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Related Experiment Videos

Anaphylaxis to insect venom.

Holger Mosbech1

  • 1Allergy Unit 4222, National University Hospital, Blegdamsvej 9, DK 2100 Copenhagen, Denmark.

Novartis Foundation Symposium
|March 18, 2004
PubMed
Summary

Systemic reactions to insect stings affect about 1% of adults, causing symptoms like urticaria and angioedema. While venom immunotherapy is effective, its optimal duration for treating insect sting allergies remains under investigation.

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Area of Science:

  • Allergy and Immunology
  • Toxicology
  • Epidemiology

Background:

  • Systemic reactions to insect stings occur in approximately 1% of adults, with urticaria and angioedema being common manifestations.
  • Insect venom contains various components, including peptides, low molecular weight substances (e.g., histamine), and high molecular weight allergens with enzyme activity.
  • Differentiating allergic reactions from vasovagal or psychogenic responses based solely on clinical history can be challenging.

Purpose of the Study:

  • To review the prevalence, clinical presentation, diagnosis, and management of systemic reactions to insect stings.
  • To discuss the role of skin testing and venom-specific IgE in diagnosing insect sting allergy.
  • To evaluate the effectiveness of venom immunotherapy and identify areas of ongoing research, such as treatment duration.

Main Methods:

  • Literature review of studies on insect sting reactions, venom composition, diagnostic methods, and immunotherapy.
  • Analysis of epidemiological data on the prevalence and mortality associated with insect stings.
  • Synthesis of current understanding regarding the mechanisms of allergic and non-allergic reactions to insect venom.

Main Results:

  • Systemic sting reactions affect about 1% of adults, with a low mortality rate (0.1-0.5 per million).
  • Diagnostic tests like skin tests and venom-specific IgE can indicate allergy, but false positives are common in the general population.
  • Approximately 50% of individuals who experience a systemic reaction will react again to a future sting.

Conclusions:

  • Accurate diagnosis of insect sting allergy is crucial, often requiring a combination of clinical history and objective testing.
  • Venom immunotherapy is an effective treatment for systemic insect sting reactions.
  • Further research is needed to determine the optimal duration for venom immunotherapy to ensure long-term protection while minimizing treatment burden.

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