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Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin,...
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Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing...
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Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial...
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Murine Model of Allergen Induced Asthma
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Pet avoidance in allergy cases: Is it possible to implement it?

Jorge Sánchez1, Susana Díez2, Ricardo Cardona2

  • 1Fundación para el Desarrollo de las Ciencias Médicas y Biológicas, Cartagena, Colombia.

Biomedica : Revista Del Instituto Nacional De Salud
|February 6, 2016
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Summary

Pet avoidance is often recommended for allergic patients but is difficult to achieve due to emotional bonds and indirect exposure. Most patients with pet allergies do not follow avoidance recommendations, making them impractical.

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Area of Science:

  • Allergy and Immunology
  • Environmental Health
  • Dermatology

Background:

  • Pet avoidance is a common recommendation for allergic patients.
  • Emotional attachment to pets and controversial effectiveness challenge avoidance strategies.

Purpose of the Study:

  • To assess the feasibility and efficacy of pet avoidance measures in sensitized individuals.
  • Investigate patient adherence to pet allergen avoidance recommendations.

Main Methods:

  • 288 patients with allergic conditions underwent skin prick testing for common pet allergens.
  • Assessed direct (pets at home) and indirect animal exposure levels.
  • Evaluated adherence to avoidance recommendations (e.g., pet removal, indirect exposure reduction) over follow-up appointments.

Main Results:

  • High sensitization rates observed for cats (9%), dogs (48%), and birds (14%).
  • Significant direct (30%) and indirect (46%) exposure to pets was reported.
  • Of 50 sensitized patients with pets at home, most refused removal due to emotional attachment; only two complied.

Conclusions:

  • High pet exposure contributes to sensitization prevalence.
  • Emotional ties to pets and widespread indirect exposure hinder the practical implementation of avoidance strategies.
  • Current pet avoidance recommendations are often unachievable for sensitized patients.