Clam Allergy Blood Test in Arizona

What this test measures

This test measures allergen-specific immunoglobulin E against clam proteins in a serum sample. Shellfish allergy is one of the more common food allergies in adults and can persist for life. Clams belong to the mollusk group, which is distinct from crustaceans such as shrimp and crab, although some proteins overlap between the two groups. The assay reports clam-specific antibody levels and an IgE class.

The sample is obtained through a routine blood draw at a partner laboratory and analyzed by immunoassay. Results are expressed in kilounits per liter, with total IgE and eosinophil counts sometimes included as supporting information. Tropomyosin, a muscle protein shared by many shellfish, is a frequent target of allergic antibodies, so cross-reactive patterns may be evaluated when a broader shellfish panel is ordered.

People order this test after experiencing hives, swelling, oral itching, breathing changes, or gastrointestinal symptoms following clam consumption. It may also be requested before broadening a diet that includes mollusks. The test detects sensitization and does not measure reaction severity, so a qualified healthcare provider should guide interpretation and any decisions about dietary exposure.