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  1. Contact allergy : Another occupational risk for Tetranychus urticae.

    Article - En anglais

    Background 

    Tetranychus urticae is a phytophagous, macroscopic mite ubiquitous to warm climates, which causes occupational allergic symptoms in farm workers.

    Objective 

    This study was designed to investigate the cause and mechanisms of an otherwise « undetermined » recurrent and occupational dermatitis on the hands of farm workers and to obtain a better diagnostic profile of the urticaria that many farm workers who are allergic to T. urticae experience.

    Methods 

    Fifty-six farm workers with occupational cutaneous and/or respiratory symptoms and 10 healthy farm workers underwent in vivo and in vitro diagnostic trials by skin prick testing, serum-specific IgE determination, and three different types of epicutaneous tests.

    Results 

    Four of the 10 patients with recurrent dermatitis had a positive IgE reaction to T. urticae, and five of the 10 had a positive patch test response.

    The percentage of positive patch test responses between subjects with positive T. urticae IgE and those with negative T. urticae IgE was similar.

    The diagnostic trial allowed the diagnosis of immune-mediated contact dermatitis in seven of the 10 patients with recurrent occupational dermatitis on the hands.

    The result of the epicutaneous open test on healthy skin with no history of eczema was positive in almost all patients with IgE to T. urticae and episodes of occupational urticaria.

    Conclusions 

    Urticaria frequently occurring in farm workers allergic to T. (...)

    Mots-clés Pascal : Dermatite contact, Allergie, Urticaire, Exposition professionnelle, Tetranychus urticae, Tetranychidae, Actinedida, Acariformes, Acari, Arachnida, Arthropoda, Invertebrata, Agriculteur, Test cutané, Exploration immunologique, Diagnostic, Homme, Peau pathologie, Immunopathologie, Médecine travail, Patch test

    Mots-clés Pascal anglais : Contact dermatitis, Allergy, Urticaria, Occupational exposure, Tetranychus urticae, Tetranychidae, Actinedida, Acariformes, Acari, Arachnida, Arthropoda, Invertebrata, Farmer, Skin test, Immunological investigation, Diagnosis, Human, Skin disease, Immunopathology, Occupational medicine, Patch test

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 96-0484243

    Code Inist : 002B06C04. Création : 10/04/1997.