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Association between giardiasis and allergy

M C Di Prisco1, I Hagel, N R Lynch

  • 1Institute of Biomedicine, Central University of Venezuela, Caracas.

Annals of Allergy, Asthma & Immunology : Official Publication of the American College of Allergy, Asthma, & Immunology
|October 6, 1998
PubMed
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Infection with Giardia lamblia (intestinal protozoan) is linked to a higher prevalence of allergy symptoms in children. Giardiasis may increase sensitization to food allergens due to intestinal damage.

Area of Science:

  • Immunology
  • Infectious Diseases
  • Pediatrics

Background:

  • Previous research suggests a link between Giardia lamblia infection and allergic disease.
  • Giardiasis and allergic conditions are both prevalent in certain pediatric populations.

Purpose of the Study:

  • To investigate the association between Giardia lamblia infection and allergic disease in Venezuelan children.
  • To assess immunoglobulin E (IgE) levels in children with and without Giardia infection.

Main Methods:

  • Feces examination for Giardia lamblia detection.
  • Measurement of total serum IgE levels.
  • Measurement of specific serum IgE antibodies against food allergens and Dermatophagoides pteronyssinus.

Main Results:

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  • Children with Giardia lamblia infection had a higher rate of allergy symptoms (70%) compared to uninfected children (43%).
  • Giardia-infected children exhibited significantly higher total serum IgE levels (1194 IU/mL vs. 822 IU/mL).
  • Specific IgE antibodies to food allergens were elevated in Giardia-infected children.

Conclusions:

  • A clear relationship exists between giardiasis and allergy in children.
  • Giardia infection might enhance sensitization to food antigens by increasing intestinal permeability.
  • The study highlights a potential mechanism linking parasitic infections to allergic sensitization.