Catfish Antibody Test in Arizona

What this test measures

Fish allergy involves an immune response to proteins found in fish muscle and sometimes in other tissues. Catfish is a commonly eaten freshwater fish and can be a trigger in sensitive people. Reactions typically begin within minutes to a couple of hours after exposure, and they can be more severe than reactions to some other foods. Some people react to a single species, while others react across several types of fish.

The test measures allergen-specific IgE against catfish in serum using a laboratory immunoassay. It reports whether antibodies are present and may give a quantitative level or reactivity class. The main fish allergen, parvalbumin, is found in many species, so results are often reviewed with other fish tests to see whether sensitivity is broad or limited to particular fish.

A positive result shows sensitization to catfish proteins. It does not predict how severe a reaction will be, and not everyone sensitized reacts on every exposure. Because fish allergy can be serious, a qualified healthcare provider should interpret the finding and advise on any needed precautions.