[Cross-reactivity in allergic fungal sinusitis. Case report].

Background: The presence of allergic mucin in allergic fungal sinusitis (AFS) is a manifestation that identifies it as a hypersensitivity process. AFS has a phenomenon of cross-reactivity to IgE-bound proteins having at least two shared epitopes.

Clinical Report: A 13-year-old male with nasal obstructive symptoms of three years of evolution.

[Prevalence of sensitization to fungi in patients with respiratory allergy].

Background: As part of the etiology of respiratory allergy we have genetics, prenatal factors and sensitivity to various airborne allergens, between these fungi are found. Relationship has been found between sensitization to fungal in skin tests and allergy pathogenesis and aggravation. There is a few literature in Mexico and in the north of the country it is lacking regarding this problem.