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Related Experiment Videos

Anaphylaxis after Hymenoptera sting without detectable specific IgE.

Mihaela Zidarn1, Mitja Kosnik, Igor Drinovec

  • 1University Clinic of Respiratory and Allergic Diseases, Golnik 36, 4204 Golnik, Slovenia. mihaela.zidarn@klinika-golnik.si

Acta Dermatovenerologica Alpina, Pannonica, Et Adriatica
|November 10, 2007
PubMed
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Systemic allergic reactions to bee stings may occur without detectable IgE antibodies. Venom immunotherapy can be effective, and may even induce specific IgE development.

Area of Science:

  • Allergy and Immunology
  • Clinical Medicine

Background:

  • Current guidelines recommend venom immunotherapy solely for IgE-mediated systemic reactions.
  • Diagnosis and treatment for non-IgE mediated reactions remain controversial.

Observation:

  • A patient experienced atypical systemic reactions post-bee sting with negative skin tests and specific IgE.
  • A sting provocation test revealed a positive reaction with elevated tryptase, indicating mast cell activation.

Findings:

  • Despite initial negative IgE, the patient was treated with venom immunotherapy.
  • Specific IgE antibodies for bee venom became detectable after immunotherapy initiation.

Implications:

  • This case challenges the strict reliance on IgE for diagnosing venom hypersensitivity.

Related Experiment Videos

  • Venom immunotherapy may be beneficial for patients with non-IgE mediated reactions.
  • Immunotherapy might influence the development of specific IgE in some patients.