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Related Experiment Videos

Monospecific allergy to swordfish

J M Kelso1, R T Jones, J W Yunginger

  • 1Department of Internal Medicine (Allergy Division), Naval Medical Center, San Diego, California, USA.

Annals of Allergy, Asthma & Immunology : Official Publication of the American College of Allergy, Asthma, & Immunology
|September 1, 1996
PubMed
Summary

A rare case of swordfish allergy highlights that individuals can be allergic to a single fish species. This monospecific allergy may be caused by a unique 25-kD swordfish allergen, distinct from common fish allergens.

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Area of Science:

  • Immunology
  • Allergology
  • Food Science

Background:

  • Fish allergy is a common and potentially life-threatening condition.
  • Most individuals with fish allergy react to multiple species.
  • This study focuses on a unique patient allergic exclusively to swordfish.

Observation:

  • The patient exhibited specific IgE antibody responses only to swordfish.
  • A typical multi-fish allergic individual showed IgE to a common 13-kD protein (Gad c 1).
  • The swordfish-allergic patient's IgE targeted a distinct 25-kD protein specific to swordfish.

Findings:

  • The patient's allergy was monospecific to swordfish, not to common fish allergens like Gad c 1.
  • IgE immunoblotting identified a unique 25-kD swordfish allergen responsible for the patient's reaction.

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  • This suggests the existence of species-specific allergens in fish.

    • Implications:

    • It is possible to have an isolated allergy to a single fish species.
    • The 25-kD swordfish allergen represents a potential species-specific allergen.
    • Understanding these specific allergens can improve diagnosis and management of fish allergies.