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[Skin test with aeroallergens untested in Mexico]

M P Pérez Tovar1, M Castrejón Tovar, S V Iza

  • 1QFB Laboratorios Freeman SA de CV, DF, México.

Revista Alergia Mexico (Tecamachalco, Puebla, Mexico : 1993)
|September 1, 1995
PubMed
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Certain molds not previously studied in Mexico can trigger allergic skin reactions. These fungi, including Ustilago maydis, should be considered for allergic patients, especially in farming communities.

Area of Science:

  • Mycology
  • Immunology
  • Allergology

Background:

  • Respiratory allergies are prevalent, with environmental molds being potential triggers.
  • Limited research exists on the allergenic potential of specific molds in Mexico.
  • Identifying novel mold allergens is crucial for accurate diagnosis and treatment.

Purpose of the Study:

  • To investigate the allergenic potential of five specific molds in Mexican adults.
  • To determine if these molds can elicit a positive skin test response in individuals with respiratory allergies.

Main Methods:

  • Skin prick testing using manual scarification was performed on 43 adult participants (15-45 years old).
  • The study included 34 patients with verified respiratory allergies and 9 healthy controls.

Related Experiment Videos

  • Molds tested included Ustilago maydis, Rhodotorula rubra, Puccinia graminis, Cunhigamella sp, and Zyncephalastrum sp.

    • Main Results:

    • Positive skin test reactions were observed in 26% for Ustilago maydis, 12% for Rhodotorula rubra, 12% for Puccinia graminis, 9% for Cunhigamella sp, and 6% for Zyncephalastrum sp.
    • Fisher exact test did not reveal statistically significant differences between mold reactivities.
    • A notable percentage of allergic patients showed sensitization to at least one of the tested molds.

    Conclusions:

    • The studied molds, including Ustilago maydis, can induce an immunoglobulin E (IgE)-mediated immune response.
    • These molds represent potential allergens and warrant further investigation in allergic patients, particularly those from agricultural settings.
    • Consideration of these molds in allergy testing is recommended for patients in farmer communities in Mexico.