🕷️ Crawler Inspector

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Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 114 (from laksa035)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa114.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://uptownallergyasthma.com/shellfish-allergy/\')), getAhrefsUnparsedNoserviceFromURL(\'https://uptownallergyasthma.com/shellfish-allergy/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/uptownallergyasthma.com\/shellfish-allergy\/","crawl_time":1776073944,"first_indexed_time":1595875258,"http_code":200,"src_unparsed":"com,uptownallergyasthma!\/shellfish-allergy\/ s443","src_root_hash":"13799692244025409114","history_drop_reason":null,"meta_title":"Shellfish Allergy Overview, Symptoms, & Treatment in New Orleans","meta_descriptions":["Experiencing shellfish allergy symptoms? Uptown Allergy & Asthma provides testing and treatment options to help you manage and prevent allergic reactions."],"attrs_boilerpipe_text":"Suspicious of Shellfish Allergies? We Can Help\nShellfish Allergy Symptoms, Causes, and When to See a Doctor in New Orleans, LA\nAre you experiencing shellfish allergy symptoms? Learn about how common a shellfish allergy is, symptoms, foods to avoid, and how Uptown Allergy & Asthma can help with testing, diagnosing, and treatment options. Dr. Reena Mehta is a board-certified allergist that can help you identify and navigate shellfish allergies in New Orleans, LA.\n“\nDr. Mehta has a great bedside manner and is great with our daughter. She helped us navigate the most up to date treatment options for food allergies in our 9 month old and dedicated one on one attention to us that went above and beyond the norm. She is professional and kind and has a genuine care for her patients. Highly recommend!\n“\n– Parker Valergo, 2019\nSymptoms\nAllergy List\nTesting\nTreatment\nMyths & FAQs\nA shellfish allergy is a type of seafood allergy. It occurs when the body produces an immunological response to tropomyosin and other muscle proteins found in shellfish. Shrimp, crab, and lobster are crustacea, and they cause most shellfish reactions. Mollusks such as clams, mussels, oysters, and scallops can also cause shellfish allergy, but allergies to mollusks are less prevalent than allergies to crustacea.\nShellfish allergy is an immunoglobulin E (IgE) antibody-mediated allergy. This means that when you ingest shellfish, your immune system overreacts by producing IgE antibodies which bind to mast cells. Once the shellfish protein allergen binds to the IgE antibody on the mast cell, the mast cell will release histamines that trigger allergy symptoms.\nShellfish allergy is different from fish allergy. You could be allergic to shellfish but not finned fish with a backbone such as salmon, trout, halibut, cod, or tuna. In contrast to a lot of other allergies, most people develop shellfish allergies when they are adults rather than children, and shellfish allergies typically last for life.\nHow Common is Shellfish Allergy?\nYou can develop a shellfish allergy at any age and this is true even if you’ve previously eaten shellfish without issues. However, shellfish allergy appears to be more prevalent in adults than children and 60% of all individuals with shellfish allergy first became symptomatic in their adulthood. In the US, survey studies have attempted to further quantify the proportion of the population with shellfish allergy. In one study by Sicherer et al., the authors found that 1 in 50 Americans self-reported a shellfish allergy.\nShellfish allergy that is IgE-mediated can cause a variety of symptoms which usually appear within minutes to an hour of ingestion. Shellfish allergy symptoms include:\nUrticaria (hives), an itchy skin rash of raised red spots\nAngioedema, or swelling under the skin\nAnaphylaxis, which is when multiple body systems produce a significant immune response causing a rapid drop in blood pressure and possible circulatory shock that is life-threatening\nGI symptoms such as nausea, vomiting, cramping, and diarrhea\nLightheadedness and fainting\nSometimes, patients can have shellfish asthma reactions. For example, when exposed to an environment where shellfish is cooking or being processed, vapors from the shellfish may induce asthma.\nIn addition, shellfish allergy symptoms can be triggered by exercise or exertion following ingestion. However, in the absence of intense physical activity, a person might be able to eat shellfish without any reaction.\nMany foods contain shellfish products that can trigger an allergic response, some of which are especially popular here in New Orleans.\nCrustacean Shellfish Foods\nLobster bisque\nLobster roll\nCrawfish boil\nCrab dip\nCrab cakes\nCrawfish boil\nImitation crab\nSushi\nCocktail shrimp\nShrimp scampi\nShrimp chips\nPrawns\nJambalaya\nCreole or Cajun gumbo\nWhat About Imitation Crab Meat?\nImitation crab, also known as surimi or crab stick, was developed in Japan as a cheaper alternative to genuine crab. It is highly processed with Alaska Pollock being the main ingredient. However, imitation crab also contains 2% or less of natural King Crab meat and extracts of blue crab, snow crab, and lobster–making it problematic for individuals with shellfish allergy. Refined anchovy and sardine fish oil is found in imitation crab as well.\nMolluscan Foods\nCalamari and squid\nClam chowder\nScallops\nOysters\nClams\nMussels\nEscargot\nOyster sauce found in Asian cuisine\nOther Fish-Based Products\nFish oil supplements (may contain trace amounts of shellfish proteins)\nShellfish allergy tests include skin and blood tests to help aid in the diagnosis of a shellfish allergy. However, neither test is conclusive because a positive result to a certain food does not always mean you will react to that food when you ingest it. In addition, neither the size of the wheal nor the numerical value of the IgE antibodies predicts how severe your allergic reaction to shellfish will be. Negative skin and blood tests are most useful because they can help rule out a shellfish allergy.\nSkin Testing for Shellfish Allergies\nYour allergist may perform a skin-prick test to evaluate for potential shellfish allergy. Small volumes of food allergens (and controls) are pushed into your skin with a sterile needle. After 20 minutes, the skin is re-examined for any wheals, rashes, or bumps. It is important to note that skin testing for crustacean seafood (shrimp, crab, lobster, etc.) may be falsely positive due to sensitization to arthropods like dust mites, spiders, and cockroaches.\nBlood Testing for Shellfish Allergies\nA blood test can measure the amount of IgE antibody circulating in the blood in reaction to the shellfish allergen versus other types of allergens. High levels of circulating IgE can indicate allergic reaction. Blood tests results are usually available within 1 to 2 weeks.\nElimination Diet and Oral Food Challenge\nTo definitively diagnose a food allergy, your allergist may ask you to temporarily eliminate specific foods that are suspected allergens from your diet for 2 to 4 weeks. If your allergic symptoms disappear during this time, then one or more of the eliminated foods was the allergen. If shellfish allergy is suspected, your allergist may ask you to consume a small amount of shellfish allergen in a supervised, medical setting. This is done to confirm an allergy or to verify you have outgrown one.\nLifestyle Modifications\nThere are several ways to manage a shellfish allergy. Most important is avoiding shellfish itself and also any foods that contain shellfish by carefully reading nutrition labels for ingredients.\nShellfish Allergy Medications\nSome medicines can treat a shellfish allergic reaction. If you have a mild reaction to shellfish, your healthcare provider may prescribe you an antihistamine or corticosteroid to control symptoms. However, only epinephrine injection via EpiPen can treat a severe shellfish reaction like anaphylaxis.\nShellfish Allergy and Iodine\nPatients with shellfish allergies do not have a significantly increased risk of allergic reaction to iodine, which is commonly used as an intravenous contrast agent or dye for medical imaging procedures. It is true that shellfish contain iodine as a result of iodine being leached from the soil and washed into oceans. However, iodine is not the substance in shellfish that causes allergy; rather it is the tropomyosin and other muscle proteins in shellfish that do. Additionally, research shows that patients with seafood allergy (shellfish and\/or fish) are just as likely to experience a contrast reaction as a patient with some other type of food allergy or asthma. Overall, 85% of patients with seafood allergy (shellfish and\/or fish) who receive IV contrast for an imaging procedure will not have an adverse reaction to contrast.\nGlucosamine and Shellfish Allergy\nGlucosamine supplements are taken for joint health and to prevent osteoarthritis. Glucosamine is typically extracted from a material (chitin) found in the shells of crabs, shrimp, and oysters. However, shellfish allergy results from exposure to the muscle proteins in shellfish flesh, not shells. As long as there is no cross contamination and the product is of high purity, it is unlikely that the shells used in glucosamine supplements contain the shellfish protein allergens that trigger a reaction. If you’re unsure about a specific supplement, your allergist can help you determine if it’s safe to take.\nShellfish Allergy and Collagen\nFish collagen, derived from the skin, scales, muscle, and bones of fish, is found in some nutritional supplements. Fish collagen supplements do not contain shellfish protein allergens and are unlikely to cause an allergic reaction. However, some supplements contain ingredients collectively referred to as “marine collagen,” which can be sourced from a variety of seafood, both fish and shellfish. Therefore, if you have a shellfish allergy, always read the labels on supplement bottles to verify if any of the ingredients came from the skin or muscle of shellfish, and consult your allergist if you’re unsure.\nDoes fish oil contain shellfish?\nNo. Fish oil supplements commonly contain fish including mackerel, anchovy, and sardine but not shellfish.\nDoes crawfish have iodine?\nYes, crawfish are a type of crustacean shellfish and contain small amounts of iodine.\nDo scallops have iodine in them?\nYes, scallops are a type of mollusk shellfish and contain small amounts of iodine.\nIs there iodine in shellfish?\nYes, shellfish do contain small amounts of iodine. However, iodine is not the allergen in shellfish allergy.\nCan someone eat imitation crab if allergic to shellfish?\nLikely not. This is because imitation crab typically contains 2% or less of king crab meat (shellfish) and also contains natural and artificial extracts of crab and lobster.\nCan you have an allergic reaction to imitation crab?\nYes, it is possible. Imitation crab often contains both fish and shellfish ingredients.\nCan someone eat calamari if they are allergic to shellfish?\nNo. Calamari contains squid, which is a type of molluscan shellfish categorized as a cephalopod.\nIs shrimp a shellfish?\nYes, shrimp is a type of crustacean shellfish.\nIs calamari a shellfish?\nYes, calamari contains squid, whish is a type of molluscan shellfish.\nIs crab a shellfish?\nYes, crab is a type of crustacean shellfish.\nCan you be allergic to lobster but not crab?\nYes, it’s possible. However, most people with one shellfish allergy are allergic to other shellfish species within the same class. Crab and lobster are in the same class of shellfish (crustacean) and so most people are allergic to both.\nCan you be allergic to shrimp but not crab?\nYes, it’s possible. However, most people with one shellfish allergy are allergic to other shellfish species within the same class. Crab and shrimp are in the same class of shellfish (crustacean) and so most people are allergic to both.\nHow do you know if you’re allergic to lobster?\nGI discomfort or pain, wheezing or shortness of breath, throat tightness, cough, hives, swelling, itchiness, weak pulse, and dizziness after ingesting lobster are all symptoms of lobster allergy.\nHow do you know if you’re allergic to shrimp?\nGI discomfort or pain, wheezing or shortness of breath, throat tightness, cough, hives, swelling, itchiness, weak pulse, and dizziness after ingesting shrimp are symptoms of shrimp allergy.\nSee a Shellfish Allergy Doctor in New Orleans\nSuspicious of shellfish allergy or asthmatic reactions? We can help. Allergist Doctor Mehta has a reputation for developing strong relationships with her patients and being exceptionally attentive to their needs and concerns.\nBook An Appointment\nWe are currently accepting new Adult and Pediatric patients.\nWe look forward to your visit!\nCall us anytime,   M-F, 8am-5pm.\nSchedule an appointment using our online booking page. Give us a call if you can't find the appointment you're looking for.\nEmail us or use the \ncontact form below and we'll coordinate your visit.\nYou can also use this contact form for general inquiries.\nSocial Media\nPowered by OnChart Medical.\nCopyright © 2025 by OnChart - All Rights Reserved. \nPlease review our Terms of Use.","attrs_markdown":"- [(504) 605-5351](tel:5046055351)\n- [Schedule a Visit](https:\/\/uptownallergyasthma.com\/#book-appointment)\n- [Contact Us](https:\/\/uptownallergyasthma.com\/#book-appointment)\n- [Directions](https:\/\/g.page\/uptown-allergy-asthma)\n\n[![Uptown Allergy & Asthma](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/uptown-allergy-asthma-logo-horizontal-1.png)](https:\/\/uptownallergyasthma.com\/)\n\n- [Providers](https:\/\/uptownallergyasthma.com\/shellfish-allergy\/)\n  - [Dr. Reena Mehta](https:\/\/uptownallergyasthma.com\/allergist-dr-reena-mehta\/)\n    - [Testimonials](https:\/\/uptownallergyasthma.com\/allergist-dr-reena-mehta\/#testimonials)\n    - [In the News](https:\/\/uptownallergyasthma.com\/allergist-dr-reena-mehta\/#in-the-news)\n  - [Katie Marcel, FNP-C](https:\/\/uptownallergyasthma.com\/katie-marcel-fnp-c\/)\n- [Conditions](https:\/\/uptownallergyasthma.com\/#conditions)\n  - [Allergies](https:\/\/uptownallergyasthma.com\/shellfish-allergy\/)\n    - [Drug Allergies](https:\/\/uptownallergyasthma.com\/drug-allergy-testing-treatment\/#drug-allergies)\n    - [Eye Allergies](https:\/\/uptownallergyasthma.com\/eye-allergy-specialist\/#eye-allergies)\n    - [Food Allergies](https:\/\/uptownallergyasthma.com\/food-allergy-doctor\/#food-allergies)\n      - [Food Allergy Prevention](https:\/\/uptownallergyasthma.com\/food-allergy-prevention\/#preventing-food-allergies)\n    - [Insect Allergies](https:\/\/uptownallergyasthma.com\/insect-allergy-specialist\/#insect-allergies)\n      - [Fire Ant Allergies](https:\/\/uptownallergyasthma.com\/fire-ant-allergy\/#fire-ant-allergies)\n    - [Mold Allergies](https:\/\/uptownallergyasthma.com\/mold-allergy-testing-treatment\/#mold-allergy-overview)\n    - [Nail Polish Allergies](https:\/\/uptownallergyasthma.com\/nail-polish-allergy-treatment\/#nail-polish-allergies)\n    - [Nasal Allergies](https:\/\/uptownallergyasthma.com\/nasal-allergy-specialist\/#nasal-allergies)\n    - [Oral Allergy Syndrome](https:\/\/uptownallergyasthma.com\/oral-allergy-syndrome\/#oral-allergy-syndrome)\n    - [Pet Allergies](https:\/\/uptownallergyasthma.com\/pet-allergy-relief\/#pet-allergy-overview)\n    - [Seasonal Allergies](https:\/\/uptownallergyasthma.com\/allergy-season-new-orleans-la\/#seasonal-allergies)\n    - [Shellfish Allergy](https:\/\/uptownallergyasthma.com\/shellfish-allergy\/#shellfish-allergies)\n    - [Skin Allergies](https:\/\/uptownallergyasthma.com\/skin-allergy-doctor\/#skin-allergies)\n  - [Asthma](https:\/\/uptownallergyasthma.com\/asthma-specialist\/#asthma)\n  - [Immunodeficiency](https:\/\/uptownallergyasthma.com\/immunodeficiency-specialist\/#immunodeficiency)\n  - [Sinus Problems](https:\/\/uptownallergyasthma.com\/sinusitis-treatment\/#sinusitis)\n    - [Chronic Rhinosinusitis with Nasal Polyps (CRSwNP)](https:\/\/uptownallergyasthma.com\/chronic-rhinosinusitis-with-nasal-polyps-crswnp-treatment\/#crswnp-overview)\n  - [Summer Cold or Allergies?](https:\/\/uptownallergyasthma.com\/summer-cold-or-allergies\/)\n- [Services](https:\/\/uptownallergyasthma.com\/#services)\n  - [Adult Allergy Care](https:\/\/uptownallergyasthma.com\/)\n  - [Pediatric Allergy Care](https:\/\/uptownallergyasthma.com\/pediatric-allergist-new-orleans-la\/)\n  - [Testing](https:\/\/uptownallergyasthma.com\/#services)\n    - [Penicillin Allergy Testing](https:\/\/uptownallergyasthma.com\/penicillin-allergy-testing\/#penicillin-allergy-overview)\n    - [Skin Testing](https:\/\/uptownallergyasthma.com\/skin-testing-for-allergies\/#skin-testing)\n    - [Types of Allergy Testing](https:\/\/uptownallergyasthma.com\/types-of-allergy-testing\/#types-of-allergy-testing)\n  - [Treatment](https:\/\/uptownallergyasthma.com\/#treatment)\n    - [Allergy Shots](https:\/\/uptownallergyasthma.com\/allergy-shots\/#allergy-shots)\n    - [Biologic Therapy](https:\/\/uptownallergyasthma.com\/biologic-therapy\/#benefits)\n    - [Palforzia Peanut Allergy Treatment](https:\/\/uptownallergyasthma.com\/peanut-allergy-treatment-palforzia\/#peanut-allergies)\n- [Patient Resources](https:\/\/uptownallergyasthma.com\/patient-resources\/)\n  - [Patient Portal](https:\/\/health.healow.com\/UptownAllergyAsthma)\n  - [Patient Forms](https:\/\/uptownallergyasthma.com\/patient-resources\/#new-patient-forms)\n  - [Accepted Insurances](https:\/\/uptownallergyasthma.com\/accepted-insurances\/)\n  - [What to Expect](https:\/\/uptownallergyasthma.com\/patient-resources\/#what-to-expect)\n  - [Pollen Count in New Orleans](https:\/\/uptownallergyasthma.com\/pollen-count-new-orleans-la\/#todays-pollen-counts)\n\nSelect Page\n\nSuspicious of Shellfish Allergies? We Can Help\n\n# Shellfish Allergy Symptoms, Causes, and When to See a Doctor in New Orleans, LA\nAre you experiencing shellfish allergy symptoms? Learn about how common a shellfish allergy is, symptoms, foods to avoid, and how Uptown Allergy & Asthma can help with testing, diagnosing, and treatment options. Dr. Reena Mehta is a board-certified allergist that can help you identify and navigate shellfish allergies in New Orleans, LA.\n\n> **“**Dr. Mehta has a great bedside manner and is great with our daughter. She helped us navigate the most up to date treatment options for food allergies in our 9 month old and dedicated one on one attention to us that went above and beyond the norm. She is professional and kind and has a genuine care for her patients. Highly recommend\\!**“**\n\n– Parker Valergo, 2019\n\n[Schedule a Visit with Dr. Mehta](https:\/\/uptownallergyasthma.com\/shellfish-allergy\/#book-appointment)\n\n[![Dr. Mehta Uptown & Allergy Google Review Score](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/uaa-google-review-stars-badge-60-plus.png)](https:\/\/www.google.com\/search?q=utpown+allergy+and+asthma+new+orleans&oq=utpown+allergy+and+asthma+new+orleans&aqs=chrome..69i57j0.6324j0j4&sourceid=chrome&ie=UTF-8#lrd=0x8620a5f7f7e90a3f:0xad3e5834b6580b9,1,,,)\n\n![Shellfish allergy doctor Dr. Reena Mehta in New Orleans, LA](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/dr-reena-mehta-white-coat-headshot-shorter.png)\n\n![Uptown Allergy & Asthma logo horizontal](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/uptown-allergy-asthma-logo-horizontal-1.png)\n## Shellfish Allergy Overview\nSymptoms\n\nAllergy List\n\nTesting\n\nTreatment\n\nMyths & FAQs\n\nA shellfish allergy is a type of seafood allergy. It occurs when the body produces an immunological response to tropomyosin and other muscle proteins found in shellfish. Shrimp, crab, and lobster are crustacea, and they cause most shellfish reactions. Mollusks such as clams, mussels, oysters, and scallops can also cause shellfish allergy, but allergies to mollusks are less prevalent than allergies to crustacea.\n\nShellfish allergy is an immunoglobulin E (IgE) antibody-mediated allergy. This means that when you ingest shellfish, your immune system overreacts by producing IgE antibodies which bind to mast cells. Once the shellfish protein allergen binds to the IgE antibody on the mast cell, the mast cell will release histamines that trigger allergy symptoms.\n\n![Shellfish allergies in New Orleans caused by crab legs](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/shellfish-allergy-crab-legs.jpg)\n\nShellfish allergy is different from fish allergy. You could be allergic to shellfish but not finned fish with a backbone such as salmon, trout, halibut, cod, or tuna. In contrast to a lot of other allergies, most people develop shellfish allergies when they are adults rather than children, and shellfish allergies typically last for life.\n\n### How Common is Shellfish Allergy?\nYou can develop a shellfish allergy at any age and this is true even if you’ve previously eaten shellfish without issues. However, shellfish allergy appears to be more prevalent in adults than children and 60% of all individuals with shellfish allergy first became symptomatic in their adulthood. In the US, survey studies have attempted to further quantify the proportion of the population with shellfish allergy. In one study by Sicherer et al., the authors found that 1 in 50 Americans self-reported a shellfish allergy.\n## Shellfish Allergy Symptoms\nShellfish allergy that is IgE-mediated can cause a variety of symptoms which usually appear within minutes to an hour of ingestion. Shellfish allergy symptoms include:\n\n- Urticaria (hives), an itchy skin rash of raised red spots\n- Angioedema, or swelling under the skin\n- Anaphylaxis, which is when multiple body systems produce a significant immune response causing a rapid drop in blood pressure and possible circulatory shock that is life-threatening\n- GI symptoms such as nausea, vomiting, cramping, and diarrhea\n- Lightheadedness and fainting\n\nSometimes, patients can have shellfish asthma reactions. For example, when exposed to an environment where shellfish is cooking or being processed, vapors from the shellfish may induce asthma.\n\n![Itchy hives caused by allergic reaction to shellfish](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/food-allergy-itchy-hives.png)\n\nIn addition, shellfish allergy symptoms can be triggered by exercise or exertion following ingestion. However, in the absence of intense physical activity, a person might be able to eat shellfish without any reaction.\n## Shellfish Allergy List\nMany foods contain shellfish products that can trigger an allergic response, some of which are especially popular here in New Orleans.\n\n### Crustacean Shellfish Foods\n\n- Lobster bisque\n- Lobster roll\n- Crawfish boil\n- Crab dip\n- Crab cakes\n- Crawfish boil\n- Imitation crab\n- Sushi\n- Cocktail shrimp\n- Shrimp scampi\n- Shrimp chips\n- Prawns\n- Jambalaya\n- Creole or Cajun gumbo\n\n![Shellfish allergies in New Orleans caused by seafood jambalaya](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/shellfish-allergy-jambalaya.jpg)\n\n### What About Imitation Crab Meat?\nImitation crab, also known as surimi or crab stick, was developed in Japan as a cheaper alternative to genuine crab. It is highly processed with Alaska Pollock being the main ingredient. However, imitation crab also contains 2% or less of natural King Crab meat and extracts of blue crab, snow crab, and lobster–making it problematic for individuals with shellfish allergy. Refined anchovy and sardine fish oil is found in imitation crab as well.\n\n### Molluscan Foods\n- Calamari and squid\n- Clam chowder\n- Scallops\n- Oysters\n- Clams\n- Mussels\n- Escargot\n- Oyster sauce found in Asian cuisine\n### Other Fish-Based Products\n- Fish oil supplements (may contain trace amounts of shellfish proteins)\n## Shellfish Allergy Tests\nShellfish allergy tests include skin and blood tests to help aid in the diagnosis of a shellfish allergy. However, neither test is conclusive because a positive result to a certain food does not always mean you will react to that food when you ingest it. In addition, neither the size of the wheal nor the numerical value of the IgE antibodies predicts how severe your allergic reaction to shellfish will be. Negative skin and blood tests are most useful because they can help rule out a shellfish allergy.\n\n### Skin Testing for Shellfish Allergies\nYour allergist may perform a skin-prick test to evaluate for potential shellfish allergy. Small volumes of food allergens (and controls) are pushed into your skin with a sterile needle. After 20 minutes, the skin is re-examined for any wheals, rashes, or bumps. It is important to note that skin testing for crustacean seafood (shrimp, crab, lobster, etc.) may be falsely positive due to sensitization to arthropods like dust mites, spiders, and cockroaches.\n\n### Blood Testing for Shellfish Allergies\nA blood test can measure the amount of IgE antibody circulating in the blood in reaction to the shellfish allergen versus other types of allergens. High levels of circulating IgE can indicate allergic reaction. Blood tests results are usually available within 1 to 2 weeks.\n\n### Elimination Diet and Oral Food Challenge\nTo definitively diagnose a food allergy, your allergist may ask you to temporarily eliminate specific foods that are suspected allergens from your diet for 2 to 4 weeks. If your allergic symptoms disappear during this time, then one or more of the eliminated foods was the allergen. If shellfish allergy is suspected, your allergist may ask you to consume a small amount of shellfish allergen in a supervised, medical setting. This is done to confirm an allergy or to verify you have outgrown one.\n## Shellfish Allergy Treatment & Management\n### Lifestyle Modifications\nThere are several ways to manage a shellfish allergy. Most important is avoiding shellfish itself and also any foods that contain shellfish by carefully reading nutrition labels for ingredients.\n\n### Shellfish Allergy Medications\nSome medicines can treat a shellfish allergic reaction. If you have a mild reaction to shellfish, your healthcare provider may prescribe you an antihistamine or corticosteroid to control symptoms. However, only epinephrine injection via EpiPen can treat a severe shellfish reaction like anaphylaxis.\n\n![Shellfish allergy medications at pharmacy in New Orleans](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/summer-cold-or-allergies.png)\n## Myths About Shellfish Allergies\n### Shellfish Allergy and Iodine\nPatients with shellfish allergies do not have a significantly increased risk of allergic reaction to iodine, which is commonly used as an intravenous contrast agent or dye for medical imaging procedures. It is true that shellfish contain iodine as a result of iodine being leached from the soil and washed into oceans. However, iodine is not the substance in shellfish that causes allergy; rather it is the tropomyosin and other muscle proteins in shellfish that do. Additionally, research shows that patients with seafood allergy (shellfish and\/or fish) are just as likely to experience a contrast reaction as a patient with some other type of food allergy or asthma. Overall, 85% of patients with seafood allergy (shellfish and\/or fish) who receive IV contrast for an imaging procedure will not have an adverse reaction to contrast.\n\n### Glucosamine and Shellfish Allergy\nGlucosamine supplements are taken for joint health and to prevent osteoarthritis. Glucosamine is typically extracted from a material (chitin) found in the shells of crabs, shrimp, and oysters. However, shellfish allergy results from exposure to the muscle proteins in shellfish flesh, not shells. As long as there is no cross contamination and the product is of high purity, it is unlikely that the shells used in glucosamine supplements contain the shellfish protein allergens that trigger a reaction. If you’re unsure about a specific supplement, your allergist can help you determine if it’s safe to take.\n\n### Shellfish Allergy and Collagen\nFish collagen, derived from the skin, scales, muscle, and bones of fish, is found in some nutritional supplements. Fish collagen supplements do not contain shellfish protein allergens and are unlikely to cause an allergic reaction. However, some supplements contain ingredients collectively referred to as “marine collagen,” which can be sourced from a variety of seafood, both fish and shellfish. Therefore, if you have a shellfish allergy, always read the labels on supplement bottles to verify if any of the ingredients came from the skin or muscle of shellfish, and consult your allergist if you’re unsure.\n## Frequently Asked Questions\n### Does fish oil contain shellfish?\nNo. Fish oil supplements commonly contain fish including mackerel, anchovy, and sardine but not shellfish.\n\n### Does crawfish have iodine?\nYes, crawfish are a type of crustacean shellfish and contain small amounts of iodine.\n\n### Do scallops have iodine in them?\nYes, scallops are a type of mollusk shellfish and contain small amounts of iodine.\n\n### Is there iodine in shellfish?\nYes, shellfish do contain small amounts of iodine. However, iodine is not the allergen in shellfish allergy.\n\n### Can someone eat imitation crab if allergic to shellfish?\nLikely not. This is because imitation crab typically contains 2% or less of king crab meat (shellfish) and also contains natural and artificial extracts of crab and lobster.\n\n### Can you have an allergic reaction to imitation crab?\nYes, it is possible. Imitation crab often contains both fish and shellfish ingredients.\n\n### Can someone eat calamari if they are allergic to shellfish?\nNo. Calamari contains squid, which is a type of molluscan shellfish categorized as a cephalopod.\n\n### Is shrimp a shellfish?\nYes, shrimp is a type of crustacean shellfish.\n\n### Is calamari a shellfish?\nYes, calamari contains squid, whish is a type of molluscan shellfish.\n\n### Is crab a shellfish?\nYes, crab is a type of crustacean shellfish.\n\n### Can you be allergic to lobster but not crab?\nYes, it’s possible. However, most people with one shellfish allergy are allergic to other shellfish species within the same class. Crab and lobster are in the same class of shellfish (crustacean) and so most people are allergic to both.\n\n### Can you be allergic to shrimp but not crab?\nYes, it’s possible. However, most people with one shellfish allergy are allergic to other shellfish species within the same class. Crab and shrimp are in the same class of shellfish (crustacean) and so most people are allergic to both.\n\n### How do you know if you’re allergic to lobster?\nGI discomfort or pain, wheezing or shortness of breath, throat tightness, cough, hives, swelling, itchiness, weak pulse, and dizziness after ingesting lobster are all symptoms of lobster allergy.\n\n### How do you know if you’re allergic to shrimp?\nGI discomfort or pain, wheezing or shortness of breath, throat tightness, cough, hives, swelling, itchiness, weak pulse, and dizziness after ingesting shrimp are symptoms of shrimp allergy.\n\n![Uptown Allergy & Asthma logo horizontal](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/uptown-allergy-asthma-logo-horizontal-1.png)\n\n## See a Shellfish Allergy Doctor in New Orleans\nSuspicious of shellfish allergy or asthmatic reactions? We can help. Allergist Doctor Mehta has a reputation for developing strong relationships with her patients and being exceptionally attentive to their needs and concerns.\n\n### Book An Appointment\nWe are currently accepting new Adult and Pediatric patients.  \n We look forward to your visit\\!\n\n[![Phone icon pink circle](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/phone-icon-circle-pink.png)](tel:5046055351)\n\n**Phone**  \n [(504) 605-5351](tel:5046055351)\n\nCall us anytime, M-F, 8am-5pm.\n\n[![Book online icon pink circle](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/book-online-icon-circle-pink.png)](https:\/\/healow.com\/apps\/provider\/reena-mehta-1207856)\n\n**Book Online**  \n [Click Here to Book Online](https:\/\/healow.com\/apps\/provider\/reena-mehta-1207856)\n\nSchedule an appointment using our online booking page. Give us a call if you can't find the appointment you're looking for.\n\n[![Email icon pink circle](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/email-icon-circle-pink.png)](mailto:info@uptownallergyasthma.com)\n\n**Email**  \n [info@uptownallergyasthma.com](mailto:info@uptownallergyasthma.com)\n\nEmail us or use the   \ncontact form below and we'll coordinate your visit.\n\nYou can also use this contact form for general inquiries.\n\n### Contact\n> Phone\n> \n> [(504) 605-5351](tel:5046055351)\n\n> Fax  \n>  (877) 637-9467\n\n> Email  \n>  [info@uptownallergyasthma.com](mailto:info@uptownallergyasthma.com)\n\n### Location\nUptown New Orleans\n\n[2620 Jena St, New Orleans, LA 70115](https:\/\/g.page\/uptown-allergy-asthma)\n\n### Site Navigation\n- [Home](https:\/\/uptownallergyasthma.com\/)\n- [About Us](https:\/\/uptownallergyasthma.com\/allergist-dr-reena-mehta\/)\n- [Patient Resources](https:\/\/uptownallergyasthma.com\/patient-resources\/)\n### Patient Education\n- [Conditions](https:\/\/uptownallergyasthma.com\/#conditions)\n- [Testing](https:\/\/uptownallergyasthma.com\/#services)\n- [Treatment](https:\/\/uptownallergyasthma.com\/#treatment)\n\n![Uptown Allergy & Asthma logo horizontal pink](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/2019\/02\/uptown-allergy-asthma-logo-horizontal-pink.png)\n\n### Social Media\n- [Follow](https:\/\/www.facebook.com\/Uptown-Allergy-Asthma-386781715214442\/?modal=admin_todo_tour \"Follow on Facebook\")\n- [Follow](https:\/\/www.instagram.com\/reena_mehta_md\/ \"Follow on Instagram\")\n- [Follow](https:\/\/www.youtube.com\/channel\/UClpBN_pCSAYAlbqcCoDgoiA \"Follow on Youtube\")\n- [Follow](https:\/\/twitter.com\/ReenaMehtaMD \"Follow on X\")\n- [Follow](https:\/\/www.linkedin.com\/in\/reena-mehta-md-07b437167\/ \"Follow on LinkedIn\")\n\nPowered by OnChart Medical.\n\n![OnChart logo white](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/2019\/02\/onchart-logo-white-1-300x163.png)\n\nCopyright © 2025 by OnChart - All Rights Reserved. Please review our Terms of Use.","attrs_readable_markdown":"Suspicious of Shellfish Allergies? We Can Help\n\nShellfish Allergy Symptoms, Causes, and When to See a Doctor in New Orleans, LA\n\nAre you experiencing shellfish allergy symptoms? Learn about how common a shellfish allergy is, symptoms, foods to avoid, and how Uptown Allergy & Asthma can help with testing, diagnosing, and treatment options. Dr. Reena Mehta is a board-certified allergist that can help you identify and navigate shellfish allergies in New Orleans, LA.\n\n> **“**Dr. Mehta has a great bedside manner and is great with our daughter. She helped us navigate the most up to date treatment options for food allergies in our 9 month old and dedicated one on one attention to us that went above and beyond the norm. She is professional and kind and has a genuine care for her patients. Highly recommend\\!**“**\n\n– Parker Valergo, 2019\n\n[![Dr. Mehta Uptown & Allergy Google Review Score](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/uaa-google-review-stars-badge-60-plus.png)](https:\/\/www.google.com\/search?q=utpown+allergy+and+asthma+new+orleans&oq=utpown+allergy+and+asthma+new+orleans&aqs=chrome..69i57j0.6324j0j4&sourceid=chrome&ie=UTF-8#lrd=0x8620a5f7f7e90a3f:0xad3e5834b6580b9,1,,,)\n\n![Shellfish allergy doctor Dr. Reena Mehta in New Orleans, LA](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/dr-reena-mehta-white-coat-headshot-shorter.png)\n\n![Uptown Allergy & Asthma logo horizontal](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/uptown-allergy-asthma-logo-horizontal-1.png)\n\nSymptoms\n\nAllergy List\n\nTesting\n\nTreatment\n\nMyths & FAQs\n\nA shellfish allergy is a type of seafood allergy. It occurs when the body produces an immunological response to tropomyosin and other muscle proteins found in shellfish. Shrimp, crab, and lobster are crustacea, and they cause most shellfish reactions. Mollusks such as clams, mussels, oysters, and scallops can also cause shellfish allergy, but allergies to mollusks are less prevalent than allergies to crustacea.\n\nShellfish allergy is an immunoglobulin E (IgE) antibody-mediated allergy. This means that when you ingest shellfish, your immune system overreacts by producing IgE antibodies which bind to mast cells. Once the shellfish protein allergen binds to the IgE antibody on the mast cell, the mast cell will release histamines that trigger allergy symptoms.\n\n![Shellfish allergies in New Orleans caused by crab legs](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/shellfish-allergy-crab-legs.jpg)\n\nShellfish allergy is different from fish allergy. You could be allergic to shellfish but not finned fish with a backbone such as salmon, trout, halibut, cod, or tuna. In contrast to a lot of other allergies, most people develop shellfish allergies when they are adults rather than children, and shellfish allergies typically last for life.\n\nHow Common is Shellfish Allergy?\n\nYou can develop a shellfish allergy at any age and this is true even if you’ve previously eaten shellfish without issues. However, shellfish allergy appears to be more prevalent in adults than children and 60% of all individuals with shellfish allergy first became symptomatic in their adulthood. In the US, survey studies have attempted to further quantify the proportion of the population with shellfish allergy. In one study by Sicherer et al., the authors found that 1 in 50 Americans self-reported a shellfish allergy.\n\nShellfish allergy that is IgE-mediated can cause a variety of symptoms which usually appear within minutes to an hour of ingestion. Shellfish allergy symptoms include:\n\n- Urticaria (hives), an itchy skin rash of raised red spots\n- Angioedema, or swelling under the skin\n- Anaphylaxis, which is when multiple body systems produce a significant immune response causing a rapid drop in blood pressure and possible circulatory shock that is life-threatening\n- GI symptoms such as nausea, vomiting, cramping, and diarrhea\n- Lightheadedness and fainting\n\nSometimes, patients can have shellfish asthma reactions. For example, when exposed to an environment where shellfish is cooking or being processed, vapors from the shellfish may induce asthma.\n\n![Itchy hives caused by allergic reaction to shellfish](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/food-allergy-itchy-hives.png)\n\nIn addition, shellfish allergy symptoms can be triggered by exercise or exertion following ingestion. However, in the absence of intense physical activity, a person might be able to eat shellfish without any reaction.\n\nMany foods contain shellfish products that can trigger an allergic response, some of which are especially popular here in New Orleans.\n\nCrustacean Shellfish Foods\n\n- Lobster bisque\n- Lobster roll\n- Crawfish boil\n- Crab dip\n- Crab cakes\n- Crawfish boil\n- Imitation crab\n- Sushi\n- Cocktail shrimp\n- Shrimp scampi\n- Shrimp chips\n- Prawns\n- Jambalaya\n- Creole or Cajun gumbo\n\n![Shellfish allergies in New Orleans caused by seafood jambalaya](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/shellfish-allergy-jambalaya.jpg)\n\nWhat About Imitation Crab Meat?\n\nImitation crab, also known as surimi or crab stick, was developed in Japan as a cheaper alternative to genuine crab. It is highly processed with Alaska Pollock being the main ingredient. However, imitation crab also contains 2% or less of natural King Crab meat and extracts of blue crab, snow crab, and lobster–making it problematic for individuals with shellfish allergy. Refined anchovy and sardine fish oil is found in imitation crab as well.\n\nMolluscan Foods\n\n- Calamari and squid\n- Clam chowder\n- Scallops\n- Oysters\n- Clams\n- Mussels\n- Escargot\n- Oyster sauce found in Asian cuisine\n\nOther Fish-Based Products\n\n- Fish oil supplements (may contain trace amounts of shellfish proteins)\n\nShellfish allergy tests include skin and blood tests to help aid in the diagnosis of a shellfish allergy. However, neither test is conclusive because a positive result to a certain food does not always mean you will react to that food when you ingest it. In addition, neither the size of the wheal nor the numerical value of the IgE antibodies predicts how severe your allergic reaction to shellfish will be. Negative skin and blood tests are most useful because they can help rule out a shellfish allergy.\n\nSkin Testing for Shellfish Allergies\n\nYour allergist may perform a skin-prick test to evaluate for potential shellfish allergy. Small volumes of food allergens (and controls) are pushed into your skin with a sterile needle. After 20 minutes, the skin is re-examined for any wheals, rashes, or bumps. It is important to note that skin testing for crustacean seafood (shrimp, crab, lobster, etc.) may be falsely positive due to sensitization to arthropods like dust mites, spiders, and cockroaches.\n\nBlood Testing for Shellfish Allergies\n\nA blood test can measure the amount of IgE antibody circulating in the blood in reaction to the shellfish allergen versus other types of allergens. High levels of circulating IgE can indicate allergic reaction. Blood tests results are usually available within 1 to 2 weeks.\n\nElimination Diet and Oral Food Challenge\n\nTo definitively diagnose a food allergy, your allergist may ask you to temporarily eliminate specific foods that are suspected allergens from your diet for 2 to 4 weeks. If your allergic symptoms disappear during this time, then one or more of the eliminated foods was the allergen. If shellfish allergy is suspected, your allergist may ask you to consume a small amount of shellfish allergen in a supervised, medical setting. This is done to confirm an allergy or to verify you have outgrown one.\n\nLifestyle Modifications\n\nThere are several ways to manage a shellfish allergy. Most important is avoiding shellfish itself and also any foods that contain shellfish by carefully reading nutrition labels for ingredients.\n\nShellfish Allergy Medications\n\nSome medicines can treat a shellfish allergic reaction. If you have a mild reaction to shellfish, your healthcare provider may prescribe you an antihistamine or corticosteroid to control symptoms. However, only epinephrine injection via EpiPen can treat a severe shellfish reaction like anaphylaxis.\n\n![Shellfish allergy medications at pharmacy in New Orleans](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/summer-cold-or-allergies.png)\n\nShellfish Allergy and Iodine\n\nPatients with shellfish allergies do not have a significantly increased risk of allergic reaction to iodine, which is commonly used as an intravenous contrast agent or dye for medical imaging procedures. It is true that shellfish contain iodine as a result of iodine being leached from the soil and washed into oceans. However, iodine is not the substance in shellfish that causes allergy; rather it is the tropomyosin and other muscle proteins in shellfish that do. Additionally, research shows that patients with seafood allergy (shellfish and\/or fish) are just as likely to experience a contrast reaction as a patient with some other type of food allergy or asthma. Overall, 85% of patients with seafood allergy (shellfish and\/or fish) who receive IV contrast for an imaging procedure will not have an adverse reaction to contrast.\n\nGlucosamine and Shellfish Allergy\n\nGlucosamine supplements are taken for joint health and to prevent osteoarthritis. Glucosamine is typically extracted from a material (chitin) found in the shells of crabs, shrimp, and oysters. However, shellfish allergy results from exposure to the muscle proteins in shellfish flesh, not shells. As long as there is no cross contamination and the product is of high purity, it is unlikely that the shells used in glucosamine supplements contain the shellfish protein allergens that trigger a reaction. If you’re unsure about a specific supplement, your allergist can help you determine if it’s safe to take.\n\nShellfish Allergy and Collagen\n\nFish collagen, derived from the skin, scales, muscle, and bones of fish, is found in some nutritional supplements. Fish collagen supplements do not contain shellfish protein allergens and are unlikely to cause an allergic reaction. However, some supplements contain ingredients collectively referred to as “marine collagen,” which can be sourced from a variety of seafood, both fish and shellfish. Therefore, if you have a shellfish allergy, always read the labels on supplement bottles to verify if any of the ingredients came from the skin or muscle of shellfish, and consult your allergist if you’re unsure.\n\nDoes fish oil contain shellfish?\n\nNo. Fish oil supplements commonly contain fish including mackerel, anchovy, and sardine but not shellfish.\n\nDoes crawfish have iodine?\n\nYes, crawfish are a type of crustacean shellfish and contain small amounts of iodine.\n\nDo scallops have iodine in them?\n\nYes, scallops are a type of mollusk shellfish and contain small amounts of iodine.\n\nIs there iodine in shellfish?\n\nYes, shellfish do contain small amounts of iodine. However, iodine is not the allergen in shellfish allergy.\n\nCan someone eat imitation crab if allergic to shellfish?\n\nLikely not. This is because imitation crab typically contains 2% or less of king crab meat (shellfish) and also contains natural and artificial extracts of crab and lobster.\n\nCan you have an allergic reaction to imitation crab?\n\nYes, it is possible. Imitation crab often contains both fish and shellfish ingredients.\n\nCan someone eat calamari if they are allergic to shellfish?\n\nNo. Calamari contains squid, which is a type of molluscan shellfish categorized as a cephalopod.\n\nIs shrimp a shellfish?\n\nYes, shrimp is a type of crustacean shellfish.\n\nIs calamari a shellfish?\n\nYes, calamari contains squid, whish is a type of molluscan shellfish.\n\nIs crab a shellfish?\n\nYes, crab is a type of crustacean shellfish.\n\nCan you be allergic to lobster but not crab?\n\nYes, it’s possible. However, most people with one shellfish allergy are allergic to other shellfish species within the same class. Crab and lobster are in the same class of shellfish (crustacean) and so most people are allergic to both.\n\nCan you be allergic to shrimp but not crab?\n\nYes, it’s possible. However, most people with one shellfish allergy are allergic to other shellfish species within the same class. Crab and shrimp are in the same class of shellfish (crustacean) and so most people are allergic to both.\n\nHow do you know if you’re allergic to lobster?\n\nGI discomfort or pain, wheezing or shortness of breath, throat tightness, cough, hives, swelling, itchiness, weak pulse, and dizziness after ingesting lobster are all symptoms of lobster allergy.\n\nHow do you know if you’re allergic to shrimp?\n\nGI discomfort or pain, wheezing or shortness of breath, throat tightness, cough, hives, swelling, itchiness, weak pulse, and dizziness after ingesting shrimp are symptoms of shrimp allergy.\n\n![Uptown Allergy & Asthma logo horizontal](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/uptown-allergy-asthma-logo-horizontal-1.png)\n\nSee a Shellfish Allergy Doctor in New Orleans\n\nSuspicious of shellfish allergy or asthmatic reactions? We can help. Allergist Doctor Mehta has a reputation for developing strong relationships with her patients and being exceptionally attentive to their needs and concerns.\n\n### Book An Appointment\nWe are currently accepting new Adult and Pediatric patients.  \n We look forward to your visit\\!\n\n[![Phone icon pink circle](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/phone-icon-circle-pink.png)](tel:5046055351)\n\nCall us anytime, M-F, 8am-5pm.\n\n[![Book online icon pink circle](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/book-online-icon-circle-pink.png)](https:\/\/healow.com\/apps\/provider\/reena-mehta-1207856)\n\nSchedule an appointment using our online booking page. Give us a call if you can't find the appointment you're looking for.\n\n[![Email icon pink circle](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/email-icon-circle-pink.png)](mailto:info@uptownallergyasthma.com)\n\nEmail us or use the   \ncontact form below and we'll coordinate your visit.\n\nYou can also use this contact form for general inquiries.\n\n![Uptown Allergy & Asthma logo horizontal pink](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/2019\/02\/uptown-allergy-asthma-logo-horizontal-pink.png)\n\nSocial Media\n\nPowered by OnChart Medical.\n\n![OnChart logo white](https:\/\/uptownallergyasthma.com\/wp-content\/uploads\/2019\/02\/onchart-logo-white-1-300x163.png)\n\nCopyright © 2025 by OnChart - All Rights Reserved. Please review our Terms of Use.","meta_canonical":null}

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Boilerpipe Text	Suspicious of Shellfish Allergies? We Can Help Shellfish Allergy Symptoms, Causes, and When to See a Doctor in New Orleans, LA Are you experiencing shellfish allergy symptoms? Learn about how common a shellfish allergy is, symptoms, foods to avoid, and how Uptown Allergy & Asthma can help with testing, diagnosing, and treatment options. Dr. Reena Mehta is a board-certified allergist that can help you identify and navigate shellfish allergies in New Orleans, LA. “ Dr. Mehta has a great bedside manner and is great with our daughter. She helped us navigate the most up to date treatment options for food allergies in our 9 month old and dedicated one on one attention to us that went above and beyond the norm. She is professional and kind and has a genuine care for her patients. Highly recommend! “ – Parker Valergo, 2019 Symptoms Allergy List Testing Treatment Myths & FAQs A shellfish allergy is a type of seafood allergy. It occurs when the body produces an immunological response to tropomyosin and other muscle proteins found in shellfish. Shrimp, crab, and lobster are crustacea, and they cause most shellfish reactions. Mollusks such as clams, mussels, oysters, and scallops can also cause shellfish allergy, but allergies to mollusks are less prevalent than allergies to crustacea. Shellfish allergy is an immunoglobulin E (IgE) antibody-mediated allergy. This means that when you ingest shellfish, your immune system overreacts by producing IgE antibodies which bind to mast cells. Once the shellfish protein allergen binds to the IgE antibody on the mast cell, the mast cell will release histamines that trigger allergy symptoms. Shellfish allergy is different from fish allergy. You could be allergic to shellfish but not finned fish with a backbone such as salmon, trout, halibut, cod, or tuna. In contrast to a lot of other allergies, most people develop shellfish allergies when they are adults rather than children, and shellfish allergies typically last for life. How Common is Shellfish Allergy? You can develop a shellfish allergy at any age and this is true even if you’ve previously eaten shellfish without issues. However, shellfish allergy appears to be more prevalent in adults than children and 60% of all individuals with shellfish allergy first became symptomatic in their adulthood. In the US, survey studies have attempted to further quantify the proportion of the population with shellfish allergy. In one study by Sicherer et al., the authors found that 1 in 50 Americans self-reported a shellfish allergy. Shellfish allergy that is IgE-mediated can cause a variety of symptoms which usually appear within minutes to an hour of ingestion. Shellfish allergy symptoms include: Urticaria (hives), an itchy skin rash of raised red spots Angioedema, or swelling under the skin Anaphylaxis, which is when multiple body systems produce a significant immune response causing a rapid drop in blood pressure and possible circulatory shock that is life-threatening GI symptoms such as nausea, vomiting, cramping, and diarrhea Lightheadedness and fainting Sometimes, patients can have shellfish asthma reactions. For example, when exposed to an environment where shellfish is cooking or being processed, vapors from the shellfish may induce asthma. In addition, shellfish allergy symptoms can be triggered by exercise or exertion following ingestion. However, in the absence of intense physical activity, a person might be able to eat shellfish without any reaction. Many foods contain shellfish products that can trigger an allergic response, some of which are especially popular here in New Orleans. Crustacean Shellfish Foods Lobster bisque Lobster roll Crawfish boil Crab dip Crab cakes Crawfish boil Imitation crab Sushi Cocktail shrimp Shrimp scampi Shrimp chips Prawns Jambalaya Creole or Cajun gumbo What About Imitation Crab Meat? Imitation crab, also known as surimi or crab stick, was developed in Japan as a cheaper alternative to genuine crab. It is highly processed with Alaska Pollock being the main ingredient. However, imitation crab also contains 2% or less of natural King Crab meat and extracts of blue crab, snow crab, and lobster–making it problematic for individuals with shellfish allergy. Refined anchovy and sardine fish oil is found in imitation crab as well. Molluscan Foods Calamari and squid Clam chowder Scallops Oysters Clams Mussels Escargot Oyster sauce found in Asian cuisine Other Fish-Based Products Fish oil supplements (may contain trace amounts of shellfish proteins) Shellfish allergy tests include skin and blood tests to help aid in the diagnosis of a shellfish allergy. However, neither test is conclusive because a positive result to a certain food does not always mean you will react to that food when you ingest it. In addition, neither the size of the wheal nor the numerical value of the IgE antibodies predicts how severe your allergic reaction to shellfish will be. Negative skin and blood tests are most useful because they can help rule out a shellfish allergy. Skin Testing for Shellfish Allergies Your allergist may perform a skin-prick test to evaluate for potential shellfish allergy. Small volumes of food allergens (and controls) are pushed into your skin with a sterile needle. After 20 minutes, the skin is re-examined for any wheals, rashes, or bumps. It is important to note that skin testing for crustacean seafood (shrimp, crab, lobster, etc.) may be falsely positive due to sensitization to arthropods like dust mites, spiders, and cockroaches. Blood Testing for Shellfish Allergies A blood test can measure the amount of IgE antibody circulating in the blood in reaction to the shellfish allergen versus other types of allergens. High levels of circulating IgE can indicate allergic reaction. Blood tests results are usually available within 1 to 2 weeks. Elimination Diet and Oral Food Challenge To definitively diagnose a food allergy, your allergist may ask you to temporarily eliminate specific foods that are suspected allergens from your diet for 2 to 4 weeks. If your allergic symptoms disappear during this time, then one or more of the eliminated foods was the allergen. If shellfish allergy is suspected, your allergist may ask you to consume a small amount of shellfish allergen in a supervised, medical setting. This is done to confirm an allergy or to verify you have outgrown one. Lifestyle Modifications There are several ways to manage a shellfish allergy. Most important is avoiding shellfish itself and also any foods that contain shellfish by carefully reading nutrition labels for ingredients. Shellfish Allergy Medications Some medicines can treat a shellfish allergic reaction. If you have a mild reaction to shellfish, your healthcare provider may prescribe you an antihistamine or corticosteroid to control symptoms. However, only epinephrine injection via EpiPen can treat a severe shellfish reaction like anaphylaxis. Shellfish Allergy and Iodine Patients with shellfish allergies do not have a significantly increased risk of allergic reaction to iodine, which is commonly used as an intravenous contrast agent or dye for medical imaging procedures. It is true that shellfish contain iodine as a result of iodine being leached from the soil and washed into oceans. However, iodine is not the substance in shellfish that causes allergy; rather it is the tropomyosin and other muscle proteins in shellfish that do. Additionally, research shows that patients with seafood allergy (shellfish and/or fish) are just as likely to experience a contrast reaction as a patient with some other type of food allergy or asthma. Overall, 85% of patients with seafood allergy (shellfish and/or fish) who receive IV contrast for an imaging procedure will not have an adverse reaction to contrast. Glucosamine and Shellfish Allergy Glucosamine supplements are taken for joint health and to prevent osteoarthritis. Glucosamine is typically extracted from a material (chitin) found in the shells of crabs, shrimp, and oysters. However, shellfish allergy results from exposure to the muscle proteins in shellfish flesh, not shells. As long as there is no cross contamination and the product is of high purity, it is unlikely that the shells used in glucosamine supplements contain the shellfish protein allergens that trigger a reaction. If you’re unsure about a specific supplement, your allergist can help you determine if it’s safe to take. Shellfish Allergy and Collagen Fish collagen, derived from the skin, scales, muscle, and bones of fish, is found in some nutritional supplements. Fish collagen supplements do not contain shellfish protein allergens and are unlikely to cause an allergic reaction. However, some supplements contain ingredients collectively referred to as “marine collagen,” which can be sourced from a variety of seafood, both fish and shellfish. Therefore, if you have a shellfish allergy, always read the labels on supplement bottles to verify if any of the ingredients came from the skin or muscle of shellfish, and consult your allergist if you’re unsure. Does fish oil contain shellfish? No. Fish oil supplements commonly contain fish including mackerel, anchovy, and sardine but not shellfish. Does crawfish have iodine? Yes, crawfish are a type of crustacean shellfish and contain small amounts of iodine. Do scallops have iodine in them? Yes, scallops are a type of mollusk shellfish and contain small amounts of iodine. Is there iodine in shellfish? Yes, shellfish do contain small amounts of iodine. However, iodine is not the allergen in shellfish allergy. Can someone eat imitation crab if allergic to shellfish? Likely not. This is because imitation crab typically contains 2% or less of king crab meat (shellfish) and also contains natural and artificial extracts of crab and lobster. Can you have an allergic reaction to imitation crab? Yes, it is possible. Imitation crab often contains both fish and shellfish ingredients. Can someone eat calamari if they are allergic to shellfish? No. Calamari contains squid, which is a type of molluscan shellfish categorized as a cephalopod. Is shrimp a shellfish? Yes, shrimp is a type of crustacean shellfish. Is calamari a shellfish? Yes, calamari contains squid, whish is a type of molluscan shellfish. Is crab a shellfish? Yes, crab is a type of crustacean shellfish. Can you be allergic to lobster but not crab? Yes, it’s possible. However, most people with one shellfish allergy are allergic to other shellfish species within the same class. Crab and lobster are in the same class of shellfish (crustacean) and so most people are allergic to both. Can you be allergic to shrimp but not crab? Yes, it’s possible. However, most people with one shellfish allergy are allergic to other shellfish species within the same class. Crab and shrimp are in the same class of shellfish (crustacean) and so most people are allergic to both. How do you know if you’re allergic to lobster? GI discomfort or pain, wheezing or shortness of breath, throat tightness, cough, hives, swelling, itchiness, weak pulse, and dizziness after ingesting lobster are all symptoms of lobster allergy. How do you know if you’re allergic to shrimp? GI discomfort or pain, wheezing or shortness of breath, throat tightness, cough, hives, swelling, itchiness, weak pulse, and dizziness after ingesting shrimp are symptoms of shrimp allergy. See a Shellfish Allergy Doctor in New Orleans Suspicious of shellfish allergy or asthmatic reactions? We can help. Allergist Doctor Mehta has a reputation for developing strong relationships with her patients and being exceptionally attentive to their needs and concerns. Book An Appointment We are currently accepting new Adult and Pediatric patients. We look forward to your visit! Call us anytime, M-F, 8am-5pm. Schedule an appointment using our online booking page. Give us a call if you can't find the appointment you're looking for. Email us or use the contact form below and we'll coordinate your visit. You can also use this contact form for general inquiries. Social Media Powered by OnChart Medical. Copyright © 2025 by OnChart - All Rights Reserved. Please review our Terms of Use.
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We Can Help # Shellfish Allergy Symptoms, Causes, and When to See a Doctor in New Orleans, LA Are you experiencing shellfish allergy symptoms? Learn about how common a shellfish allergy is, symptoms, foods to avoid, and how Uptown Allergy & Asthma can help with testing, diagnosing, and treatment options. Dr. Reena Mehta is a board-certified allergist that can help you identify and navigate shellfish allergies in New Orleans, LA. > “Dr. Mehta has a great bedside manner and is great with our daughter. She helped us navigate the most up to date treatment options for food allergies in our 9 month old and dedicated one on one attention to us that went above and beyond the norm. She is professional and kind and has a genuine care for her patients. Highly recommend\!“ – Parker Valergo, 2019 [Schedule a Visit with Dr. Mehta](https://uptownallergyasthma.com/shellfish-allergy/#book-appointment) [![Dr. Mehta Uptown & Allergy Google Review Score](https://uptownallergyasthma.com/wp-content/uploads/uaa-google-review-stars-badge-60-plus.png)](https://www.google.com/search?q=utpown+allergy+and+asthma+new+orleans&oq=utpown+allergy+and+asthma+new+orleans&aqs=chrome..69i57j0.6324j0j4&sourceid=chrome&ie=UTF-8#lrd=0x8620a5f7f7e90a3f:0xad3e5834b6580b9,1,,,) ![Shellfish allergy doctor Dr. Reena Mehta in New Orleans, LA](https://uptownallergyasthma.com/wp-content/uploads/dr-reena-mehta-white-coat-headshot-shorter.png) ![Uptown Allergy & Asthma logo horizontal](https://uptownallergyasthma.com/wp-content/uploads/uptown-allergy-asthma-logo-horizontal-1.png) ## Shellfish Allergy Overview Symptoms Allergy List Testing Treatment Myths & FAQs A shellfish allergy is a type of seafood allergy. It occurs when the body produces an immunological response to tropomyosin and other muscle proteins found in shellfish. Shrimp, crab, and lobster are crustacea, and they cause most shellfish reactions. Mollusks such as clams, mussels, oysters, and scallops can also cause shellfish allergy, but allergies to mollusks are less prevalent than allergies to crustacea. Shellfish allergy is an immunoglobulin E (IgE) antibody-mediated allergy. This means that when you ingest shellfish, your immune system overreacts by producing IgE antibodies which bind to mast cells. Once the shellfish protein allergen binds to the IgE antibody on the mast cell, the mast cell will release histamines that trigger allergy symptoms. ![Shellfish allergies in New Orleans caused by crab legs](https://uptownallergyasthma.com/wp-content/uploads/shellfish-allergy-crab-legs.jpg) Shellfish allergy is different from fish allergy. You could be allergic to shellfish but not finned fish with a backbone such as salmon, trout, halibut, cod, or tuna. In contrast to a lot of other allergies, most people develop shellfish allergies when they are adults rather than children, and shellfish allergies typically last for life. ### How Common is Shellfish Allergy? You can develop a shellfish allergy at any age and this is true even if you’ve previously eaten shellfish without issues. However, shellfish allergy appears to be more prevalent in adults than children and 60% of all individuals with shellfish allergy first became symptomatic in their adulthood. In the US, survey studies have attempted to further quantify the proportion of the population with shellfish allergy. In one study by Sicherer et al., the authors found that 1 in 50 Americans self-reported a shellfish allergy. ## Shellfish Allergy Symptoms Shellfish allergy that is IgE-mediated can cause a variety of symptoms which usually appear within minutes to an hour of ingestion. Shellfish allergy symptoms include: - Urticaria (hives), an itchy skin rash of raised red spots - Angioedema, or swelling under the skin - Anaphylaxis, which is when multiple body systems produce a significant immune response causing a rapid drop in blood pressure and possible circulatory shock that is life-threatening - GI symptoms such as nausea, vomiting, cramping, and diarrhea - Lightheadedness and fainting Sometimes, patients can have shellfish asthma reactions. For example, when exposed to an environment where shellfish is cooking or being processed, vapors from the shellfish may induce asthma. ![Itchy hives caused by allergic reaction to shellfish](https://uptownallergyasthma.com/wp-content/uploads/food-allergy-itchy-hives.png) In addition, shellfish allergy symptoms can be triggered by exercise or exertion following ingestion. However, in the absence of intense physical activity, a person might be able to eat shellfish without any reaction. ## Shellfish Allergy List Many foods contain shellfish products that can trigger an allergic response, some of which are especially popular here in New Orleans. ### Crustacean Shellfish Foods - Lobster bisque - Lobster roll - Crawfish boil - Crab dip - Crab cakes - Crawfish boil - Imitation crab - Sushi - Cocktail shrimp - Shrimp scampi - Shrimp chips - Prawns - Jambalaya - Creole or Cajun gumbo ![Shellfish allergies in New Orleans caused by seafood jambalaya](https://uptownallergyasthma.com/wp-content/uploads/shellfish-allergy-jambalaya.jpg) ### What About Imitation Crab Meat? Imitation crab, also known as surimi or crab stick, was developed in Japan as a cheaper alternative to genuine crab. It is highly processed with Alaska Pollock being the main ingredient. However, imitation crab also contains 2% or less of natural King Crab meat and extracts of blue crab, snow crab, and lobster–making it problematic for individuals with shellfish allergy. Refined anchovy and sardine fish oil is found in imitation crab as well. ### Molluscan Foods - Calamari and squid - Clam chowder - Scallops - Oysters - Clams - Mussels - Escargot - Oyster sauce found in Asian cuisine ### Other Fish-Based Products - Fish oil supplements (may contain trace amounts of shellfish proteins) ## Shellfish Allergy Tests Shellfish allergy tests include skin and blood tests to help aid in the diagnosis of a shellfish allergy. However, neither test is conclusive because a positive result to a certain food does not always mean you will react to that food when you ingest it. In addition, neither the size of the wheal nor the numerical value of the IgE antibodies predicts how severe your allergic reaction to shellfish will be. Negative skin and blood tests are most useful because they can help rule out a shellfish allergy. ### Skin Testing for Shellfish Allergies Your allergist may perform a skin-prick test to evaluate for potential shellfish allergy. Small volumes of food allergens (and controls) are pushed into your skin with a sterile needle. After 20 minutes, the skin is re-examined for any wheals, rashes, or bumps. It is important to note that skin testing for crustacean seafood (shrimp, crab, lobster, etc.) may be falsely positive due to sensitization to arthropods like dust mites, spiders, and cockroaches. ### Blood Testing for Shellfish Allergies A blood test can measure the amount of IgE antibody circulating in the blood in reaction to the shellfish allergen versus other types of allergens. High levels of circulating IgE can indicate allergic reaction. Blood tests results are usually available within 1 to 2 weeks. ### Elimination Diet and Oral Food Challenge To definitively diagnose a food allergy, your allergist may ask you to temporarily eliminate specific foods that are suspected allergens from your diet for 2 to 4 weeks. If your allergic symptoms disappear during this time, then one or more of the eliminated foods was the allergen. If shellfish allergy is suspected, your allergist may ask you to consume a small amount of shellfish allergen in a supervised, medical setting. This is done to confirm an allergy or to verify you have outgrown one. ## Shellfish Allergy Treatment & Management ### Lifestyle Modifications There are several ways to manage a shellfish allergy. Most important is avoiding shellfish itself and also any foods that contain shellfish by carefully reading nutrition labels for ingredients. ### Shellfish Allergy Medications Some medicines can treat a shellfish allergic reaction. If you have a mild reaction to shellfish, your healthcare provider may prescribe you an antihistamine or corticosteroid to control symptoms. However, only epinephrine injection via EpiPen can treat a severe shellfish reaction like anaphylaxis. ![Shellfish allergy medications at pharmacy in New Orleans](https://uptownallergyasthma.com/wp-content/uploads/summer-cold-or-allergies.png) ## Myths About Shellfish Allergies ### Shellfish Allergy and Iodine Patients with shellfish allergies do not have a significantly increased risk of allergic reaction to iodine, which is commonly used as an intravenous contrast agent or dye for medical imaging procedures. It is true that shellfish contain iodine as a result of iodine being leached from the soil and washed into oceans. However, iodine is not the substance in shellfish that causes allergy; rather it is the tropomyosin and other muscle proteins in shellfish that do. Additionally, research shows that patients with seafood allergy (shellfish and/or fish) are just as likely to experience a contrast reaction as a patient with some other type of food allergy or asthma. Overall, 85% of patients with seafood allergy (shellfish and/or fish) who receive IV contrast for an imaging procedure will not have an adverse reaction to contrast. ### Glucosamine and Shellfish Allergy Glucosamine supplements are taken for joint health and to prevent osteoarthritis. Glucosamine is typically extracted from a material (chitin) found in the shells of crabs, shrimp, and oysters. However, shellfish allergy results from exposure to the muscle proteins in shellfish flesh, not shells. As long as there is no cross contamination and the product is of high purity, it is unlikely that the shells used in glucosamine supplements contain the shellfish protein allergens that trigger a reaction. If you’re unsure about a specific supplement, your allergist can help you determine if it’s safe to take. ### Shellfish Allergy and Collagen Fish collagen, derived from the skin, scales, muscle, and bones of fish, is found in some nutritional supplements. Fish collagen supplements do not contain shellfish protein allergens and are unlikely to cause an allergic reaction. However, some supplements contain ingredients collectively referred to as “marine collagen,” which can be sourced from a variety of seafood, both fish and shellfish. Therefore, if you have a shellfish allergy, always read the labels on supplement bottles to verify if any of the ingredients came from the skin or muscle of shellfish, and consult your allergist if you’re unsure. ## Frequently Asked Questions ### Does fish oil contain shellfish? No. Fish oil supplements commonly contain fish including mackerel, anchovy, and sardine but not shellfish. ### Does crawfish have iodine? Yes, crawfish are a type of crustacean shellfish and contain small amounts of iodine. ### Do scallops have iodine in them? Yes, scallops are a type of mollusk shellfish and contain small amounts of iodine. ### Is there iodine in shellfish? Yes, shellfish do contain small amounts of iodine. However, iodine is not the allergen in shellfish allergy. ### Can someone eat imitation crab if allergic to shellfish? Likely not. This is because imitation crab typically contains 2% or less of king crab meat (shellfish) and also contains natural and artificial extracts of crab and lobster. ### Can you have an allergic reaction to imitation crab? Yes, it is possible. Imitation crab often contains both fish and shellfish ingredients. ### Can someone eat calamari if they are allergic to shellfish? No. Calamari contains squid, which is a type of molluscan shellfish categorized as a cephalopod. ### Is shrimp a shellfish? Yes, shrimp is a type of crustacean shellfish. ### Is calamari a shellfish? Yes, calamari contains squid, whish is a type of molluscan shellfish. ### Is crab a shellfish? Yes, crab is a type of crustacean shellfish. ### Can you be allergic to lobster but not crab? Yes, it’s possible. However, most people with one shellfish allergy are allergic to other shellfish species within the same class. Crab and lobster are in the same class of shellfish (crustacean) and so most people are allergic to both. ### Can you be allergic to shrimp but not crab? Yes, it’s possible. However, most people with one shellfish allergy are allergic to other shellfish species within the same class. Crab and shrimp are in the same class of shellfish (crustacean) and so most people are allergic to both. ### How do you know if you’re allergic to lobster? GI discomfort or pain, wheezing or shortness of breath, throat tightness, cough, hives, swelling, itchiness, weak pulse, and dizziness after ingesting lobster are all symptoms of lobster allergy. ### How do you know if you’re allergic to shrimp? GI discomfort or pain, wheezing or shortness of breath, throat tightness, cough, hives, swelling, itchiness, weak pulse, and dizziness after ingesting shrimp are symptoms of shrimp allergy. ![Uptown Allergy & Asthma logo horizontal](https://uptownallergyasthma.com/wp-content/uploads/uptown-allergy-asthma-logo-horizontal-1.png) ## See a Shellfish Allergy Doctor in New Orleans Suspicious of shellfish allergy or asthmatic reactions? We can help. Allergist Doctor Mehta has a reputation for developing strong relationships with her patients and being exceptionally attentive to their needs and concerns. ### Book An Appointment We are currently accepting new Adult and Pediatric patients. We look forward to your visit\! 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Readable Markdown	Suspicious of Shellfish Allergies? We Can Help Shellfish Allergy Symptoms, Causes, and When to See a Doctor in New Orleans, LA Are you experiencing shellfish allergy symptoms? Learn about how common a shellfish allergy is, symptoms, foods to avoid, and how Uptown Allergy & Asthma can help with testing, diagnosing, and treatment options. Dr. Reena Mehta is a board-certified allergist that can help you identify and navigate shellfish allergies in New Orleans, LA. > “Dr. Mehta has a great bedside manner and is great with our daughter. She helped us navigate the most up to date treatment options for food allergies in our 9 month old and dedicated one on one attention to us that went above and beyond the norm. She is professional and kind and has a genuine care for her patients. Highly recommend\!“ – Parker Valergo, 2019 [![Dr. Mehta Uptown & Allergy Google Review Score](https://uptownallergyasthma.com/wp-content/uploads/uaa-google-review-stars-badge-60-plus.png)](https://www.google.com/search?q=utpown+allergy+and+asthma+new+orleans&oq=utpown+allergy+and+asthma+new+orleans&aqs=chrome..69i57j0.6324j0j4&sourceid=chrome&ie=UTF-8#lrd=0x8620a5f7f7e90a3f:0xad3e5834b6580b9,1,,,) ![Shellfish allergy doctor Dr. Reena Mehta in New Orleans, LA](https://uptownallergyasthma.com/wp-content/uploads/dr-reena-mehta-white-coat-headshot-shorter.png) ![Uptown Allergy & Asthma logo horizontal](https://uptownallergyasthma.com/wp-content/uploads/uptown-allergy-asthma-logo-horizontal-1.png) Symptoms Allergy List Testing Treatment Myths & FAQs A shellfish allergy is a type of seafood allergy. It occurs when the body produces an immunological response to tropomyosin and other muscle proteins found in shellfish. Shrimp, crab, and lobster are crustacea, and they cause most shellfish reactions. Mollusks such as clams, mussels, oysters, and scallops can also cause shellfish allergy, but allergies to mollusks are less prevalent than allergies to crustacea. Shellfish allergy is an immunoglobulin E (IgE) antibody-mediated allergy. This means that when you ingest shellfish, your immune system overreacts by producing IgE antibodies which bind to mast cells. Once the shellfish protein allergen binds to the IgE antibody on the mast cell, the mast cell will release histamines that trigger allergy symptoms. ![Shellfish allergies in New Orleans caused by crab legs](https://uptownallergyasthma.com/wp-content/uploads/shellfish-allergy-crab-legs.jpg) Shellfish allergy is different from fish allergy. You could be allergic to shellfish but not finned fish with a backbone such as salmon, trout, halibut, cod, or tuna. In contrast to a lot of other allergies, most people develop shellfish allergies when they are adults rather than children, and shellfish allergies typically last for life. How Common is Shellfish Allergy? You can develop a shellfish allergy at any age and this is true even if you’ve previously eaten shellfish without issues. However, shellfish allergy appears to be more prevalent in adults than children and 60% of all individuals with shellfish allergy first became symptomatic in their adulthood. In the US, survey studies have attempted to further quantify the proportion of the population with shellfish allergy. In one study by Sicherer et al., the authors found that 1 in 50 Americans self-reported a shellfish allergy. Shellfish allergy that is IgE-mediated can cause a variety of symptoms which usually appear within minutes to an hour of ingestion. Shellfish allergy symptoms include: - Urticaria (hives), an itchy skin rash of raised red spots - Angioedema, or swelling under the skin - Anaphylaxis, which is when multiple body systems produce a significant immune response causing a rapid drop in blood pressure and possible circulatory shock that is life-threatening - GI symptoms such as nausea, vomiting, cramping, and diarrhea - Lightheadedness and fainting Sometimes, patients can have shellfish asthma reactions. For example, when exposed to an environment where shellfish is cooking or being processed, vapors from the shellfish may induce asthma. ![Itchy hives caused by allergic reaction to shellfish](https://uptownallergyasthma.com/wp-content/uploads/food-allergy-itchy-hives.png) In addition, shellfish allergy symptoms can be triggered by exercise or exertion following ingestion. However, in the absence of intense physical activity, a person might be able to eat shellfish without any reaction. Many foods contain shellfish products that can trigger an allergic response, some of which are especially popular here in New Orleans. Crustacean Shellfish Foods - Lobster bisque - Lobster roll - Crawfish boil - Crab dip - Crab cakes - Crawfish boil - Imitation crab - Sushi - Cocktail shrimp - Shrimp scampi - Shrimp chips - Prawns - Jambalaya - Creole or Cajun gumbo ![Shellfish allergies in New Orleans caused by seafood jambalaya](https://uptownallergyasthma.com/wp-content/uploads/shellfish-allergy-jambalaya.jpg) What About Imitation Crab Meat? Imitation crab, also known as surimi or crab stick, was developed in Japan as a cheaper alternative to genuine crab. It is highly processed with Alaska Pollock being the main ingredient. However, imitation crab also contains 2% or less of natural King Crab meat and extracts of blue crab, snow crab, and lobster–making it problematic for individuals with shellfish allergy. Refined anchovy and sardine fish oil is found in imitation crab as well. Molluscan Foods - Calamari and squid - Clam chowder - Scallops - Oysters - Clams - Mussels - Escargot - Oyster sauce found in Asian cuisine Other Fish-Based Products - Fish oil supplements (may contain trace amounts of shellfish proteins) Shellfish allergy tests include skin and blood tests to help aid in the diagnosis of a shellfish allergy. However, neither test is conclusive because a positive result to a certain food does not always mean you will react to that food when you ingest it. In addition, neither the size of the wheal nor the numerical value of the IgE antibodies predicts how severe your allergic reaction to shellfish will be. Negative skin and blood tests are most useful because they can help rule out a shellfish allergy. Skin Testing for Shellfish Allergies Your allergist may perform a skin-prick test to evaluate for potential shellfish allergy. Small volumes of food allergens (and controls) are pushed into your skin with a sterile needle. After 20 minutes, the skin is re-examined for any wheals, rashes, or bumps. It is important to note that skin testing for crustacean seafood (shrimp, crab, lobster, etc.) may be falsely positive due to sensitization to arthropods like dust mites, spiders, and cockroaches. Blood Testing for Shellfish Allergies A blood test can measure the amount of IgE antibody circulating in the blood in reaction to the shellfish allergen versus other types of allergens. High levels of circulating IgE can indicate allergic reaction. Blood tests results are usually available within 1 to 2 weeks. Elimination Diet and Oral Food Challenge To definitively diagnose a food allergy, your allergist may ask you to temporarily eliminate specific foods that are suspected allergens from your diet for 2 to 4 weeks. If your allergic symptoms disappear during this time, then one or more of the eliminated foods was the allergen. If shellfish allergy is suspected, your allergist may ask you to consume a small amount of shellfish allergen in a supervised, medical setting. This is done to confirm an allergy or to verify you have outgrown one. Lifestyle Modifications There are several ways to manage a shellfish allergy. Most important is avoiding shellfish itself and also any foods that contain shellfish by carefully reading nutrition labels for ingredients. Shellfish Allergy Medications Some medicines can treat a shellfish allergic reaction. If you have a mild reaction to shellfish, your healthcare provider may prescribe you an antihistamine or corticosteroid to control symptoms. However, only epinephrine injection via EpiPen can treat a severe shellfish reaction like anaphylaxis. ![Shellfish allergy medications at pharmacy in New Orleans](https://uptownallergyasthma.com/wp-content/uploads/summer-cold-or-allergies.png) Shellfish Allergy and Iodine Patients with shellfish allergies do not have a significantly increased risk of allergic reaction to iodine, which is commonly used as an intravenous contrast agent or dye for medical imaging procedures. It is true that shellfish contain iodine as a result of iodine being leached from the soil and washed into oceans. However, iodine is not the substance in shellfish that causes allergy; rather it is the tropomyosin and other muscle proteins in shellfish that do. Additionally, research shows that patients with seafood allergy (shellfish and/or fish) are just as likely to experience a contrast reaction as a patient with some other type of food allergy or asthma. Overall, 85% of patients with seafood allergy (shellfish and/or fish) who receive IV contrast for an imaging procedure will not have an adverse reaction to contrast. Glucosamine and Shellfish Allergy Glucosamine supplements are taken for joint health and to prevent osteoarthritis. Glucosamine is typically extracted from a material (chitin) found in the shells of crabs, shrimp, and oysters. However, shellfish allergy results from exposure to the muscle proteins in shellfish flesh, not shells. As long as there is no cross contamination and the product is of high purity, it is unlikely that the shells used in glucosamine supplements contain the shellfish protein allergens that trigger a reaction. If you’re unsure about a specific supplement, your allergist can help you determine if it’s safe to take. Shellfish Allergy and Collagen Fish collagen, derived from the skin, scales, muscle, and bones of fish, is found in some nutritional supplements. Fish collagen supplements do not contain shellfish protein allergens and are unlikely to cause an allergic reaction. However, some supplements contain ingredients collectively referred to as “marine collagen,” which can be sourced from a variety of seafood, both fish and shellfish. Therefore, if you have a shellfish allergy, always read the labels on supplement bottles to verify if any of the ingredients came from the skin or muscle of shellfish, and consult your allergist if you’re unsure. Does fish oil contain shellfish? No. Fish oil supplements commonly contain fish including mackerel, anchovy, and sardine but not shellfish. Does crawfish have iodine? Yes, crawfish are a type of crustacean shellfish and contain small amounts of iodine. Do scallops have iodine in them? Yes, scallops are a type of mollusk shellfish and contain small amounts of iodine. Is there iodine in shellfish? Yes, shellfish do contain small amounts of iodine. However, iodine is not the allergen in shellfish allergy. Can someone eat imitation crab if allergic to shellfish? Likely not. This is because imitation crab typically contains 2% or less of king crab meat (shellfish) and also contains natural and artificial extracts of crab and lobster. Can you have an allergic reaction to imitation crab? Yes, it is possible. Imitation crab often contains both fish and shellfish ingredients. Can someone eat calamari if they are allergic to shellfish? No. Calamari contains squid, which is a type of molluscan shellfish categorized as a cephalopod. Is shrimp a shellfish? Yes, shrimp is a type of crustacean shellfish. Is calamari a shellfish? Yes, calamari contains squid, whish is a type of molluscan shellfish. Is crab a shellfish? Yes, crab is a type of crustacean shellfish. Can you be allergic to lobster but not crab? Yes, it’s possible. However, most people with one shellfish allergy are allergic to other shellfish species within the same class. Crab and lobster are in the same class of shellfish (crustacean) and so most people are allergic to both. Can you be allergic to shrimp but not crab? Yes, it’s possible. However, most people with one shellfish allergy are allergic to other shellfish species within the same class. Crab and shrimp are in the same class of shellfish (crustacean) and so most people are allergic to both. How do you know if you’re allergic to lobster? GI discomfort or pain, wheezing or shortness of breath, throat tightness, cough, hives, swelling, itchiness, weak pulse, and dizziness after ingesting lobster are all symptoms of lobster allergy. How do you know if you’re allergic to shrimp? GI discomfort or pain, wheezing or shortness of breath, throat tightness, cough, hives, swelling, itchiness, weak pulse, and dizziness after ingesting shrimp are symptoms of shrimp allergy. ![Uptown Allergy & Asthma logo horizontal](https://uptownallergyasthma.com/wp-content/uploads/uptown-allergy-asthma-logo-horizontal-1.png) See a Shellfish Allergy Doctor in New Orleans Suspicious of shellfish allergy or asthmatic reactions? We can help. Allergist Doctor Mehta has a reputation for developing strong relationships with her patients and being exceptionally attentive to their needs and concerns. ### Book An Appointment We are currently accepting new Adult and Pediatric patients. We look forward to your visit\! [![Phone icon pink circle](https://uptownallergyasthma.com/wp-content/uploads/phone-icon-circle-pink.png)](tel:5046055351) Call us anytime, M-F, 8am-5pm. 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