Q. Now that I've developed an allergy to shrimp, does that imply I can't eat any shellfish? What precisely am I allergic to?
A. It's potential to be allergic solely to crustaceans, the category of shellfish that shrimp belong to, and to not all members of the opposite class, mollusks, which incorporates oysters and clams. But it surely might not be well worth the danger of consuming them to seek out out, allergy specialists warn, due to the severity of most shellfish allergy symptoms, and since allergic individuals are often allergic to each courses.
Allergic reactions to finned fish are additionally widespread however don't look like linked to shellfish allergy symptoms.
In additional than half the folks with shellfish allergy symptoms, signs don't seem till they're adults. Crustacean allergy signs are significantly extreme, with shrimp, lobster and crab the standard culprits.
All true allergy symptoms contain a response to a specific protein, known as an allergen, and several other shellfish allergens have been recognized. There are additionally some shellfish poisons that trigger signs that will resemble allergy symptoms.
Within the case of shrimp, the most important allergen is tropomyosin, which can be present in some mollusks and even in bugs and mud mites, in keeping with a assessment article within the journal Scientific and Translational Allergy.
Most shellfish allergens are proteins which can be concerned in muscle contraction.
Analysis on the molecular construction of tropomyosin might finally result in a strategy to desensitize allergic folks, scientists say.
Within the meantime, the one efficient strategy to handle such an allergy is strict avoidance of even a tiny quantity of the suspect shellfish, not simply by itself but in addition as an ingredient in ready meals and in dyes used for medical assessments. Victims are often prescribed a transportable injection machine for epinephrine, which might be lifesaving in case of a extreme anaphylactic response. query@nytimes.com
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