Occupational allergy due to spider mites : Tetranychus urtica (Koch) and Panonychus citri (Koch).
Background Allergy to both house dust and storage mites is well established, but information about other species of mites is scant.
Objective One hundred and fifty patients directly exposed to an occupational environment were studied to assess whether spider mites (Tetranychidae) caused their allergic symptoms.
We also studied a group of 50 patients from an urban environment, who were not occupationally exposed to spider mites, with a strong sensitization to Dermatphagoides pteronyssimus (RAST class 4).
Methods Case history (including questions about work-related symptoms), skin tests, RAST and conjunctival provocation tests were performed in both groups using Tetranychus urticae and Panonychus citri extracts as allergens.
Cross-reactivity between spider mites and D. Pteronyssimus was determined by RAST inhibition.
Results Fifty-four of 150 rural workers were positive to Tetranychidae and in all cases there was an associated sensitization to D. pteronyssimus.
All individuals belonging to the urban group were positive to spider mites.
RAST inhibition demonstrated a significant cross-reactivity between Tetranychidae and D. pteronyssimus.
Five of fifty-four rural workers sensitized to spider mites developed symptoms only when they handled plants or fruits infested with spider mites and they became asymptomatic when exposure ceased. (...)
Mots-clés Pascal : Allergie, Tetranychus urticae, Tetranychidae, Actinedida, Acariformes, Acari, Arachnida, Arthropoda, Invertebrata, Panonychus citri, Exposition professionnelle, Prévalence, Zone rurale, Réaction croisée, Dermatophagoides pteronyssinus, Pyroglyphidae, Acaridida, Espagne, Europe, Homme, Immunopathologie, Médecine travail
Mots-clés Pascal anglais : Allergy, Tetranychus urticae, Tetranychidae, Actinedida, Acariformes, Acari, Arachnida, Arthropoda, Invertebrata, Panonychus citri, Occupational exposure, Prevalence, Rural area, Cross reaction, Dermatophagoides pteronyssinus, Pyroglyphidae, Acaridida, Spain, Europe, Human, Immunopathology, Occupational medicine
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0040297
Code Inist : 002B06C02. Création : 21/05/1997.