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  1. Immediate allergic and nonallergic reactions to Christmas and Easter cacti.

    Article - En anglais

    Background 

    Occupational exposure to Christmas cacti has been reported as a cause of type I allergy.

    Therefore, the prevalence of immediate-type mucosal and skin reactions related to cactus exposure was studied in 103 employees in a cactus nursery.

    Methods 

    The study was based on a questionnaire followed by clinical examination, skin prick tests (SPT) with standard inhalant allergens and cacti, and a histamine-release test (HRT/Refix) using fresh cactus extracts as elicitor.

    Results 

    The questionnaire was answered by 84 (82%) of the nursery employees, and 63 (61%) were interviewed and skin prick tested ; 58 of these were tested with HRT/Refix.

    Furthermore, 22 healthy controls were included and tested in vivo and in vitro.

    Cactus-related contact urticaria and/or rhinoconjunctivitis were reported by 37% of the cactus workers.

    Based on a combination of positive history, positive SPT, and positive HRT/Refix to cactus, 8% of the cactus workers were allergic to cacti.

    No noncactus workers or controls were allergic to cacti by these criteria.

    Testing with fresh cactus material elicited positive SPT and negative HRT/Refix in 27 nursery workers and controls, of whom 12 had immediate-type skin and mucosal symptoms.

    Conclusions 

    Christmas and Easter cacti seemed to be able to induce contact urticaria and rhinoconjunctivitis on both an immunologic and a nonimmunologic basis.

    Personal atopy was associated with positive reactions to cacti.

    Mots-clés Pascal : Dermatite contact, Urticaire, Atopie, Rhinite, Allergie, Etiologie, Conjonctivite, Hypersensibilité immédiate, Exposition professionnelle, Plante, Homme, Peau pathologie, Médecine travail, Cactaceae, Dicotyledones, Angiospermae, Spermatophyta, ORL pathologie, Nez pathologie, Immunopathologie, Oeil pathologie, Conjonctive pathologie, Schlumbergera

    Mots-clés Pascal anglais : Contact dermatitis, Urticaria, Atopy, Rhinitis, Allergy, Etiology, Conjunctivitis, Immediate hypersensitivity, Occupational exposure, Plant, Human, Skin disease, Occupational medicine, Cactaceae, Dicotyledones, Angiospermae, Spermatophyta, ENT disease, Nose disease, Immunopathology, Eye disease, Conjunctiva disease

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

    Cote : 99-0276487

    Code Inist : 002B06C05. Création : 16/11/1999.