A clinical and immunological study on 92 workers occupationally exposed to anhydrides.
This study aimed at investigating sensitizing and hazardous effects of a new acid anhydride, pyromellitic dianhydride (PMDA), in addition to those of phthalic anhydride, maleic anhydride and trimellitic anhydride, in a group of 92 exposed workers in two German chemical plants.
Of the 92 workers, 56 reported work-related complaints with a predominance of phlegm and dyspnoea in those exposed to anhydride dust for less than 1 year.
Haemorrhagic rhinitis occurred only after a prolonged exposure of more than 15 years.
Specific IgE antibodies to anhydride-HSA conjugates could be detected in 15 exposed subjects, 12 of whom had work-related symptoms.
The IgE-positive group had significantly more impaired lung function parameters than the IgE-negative group.
The proportion of IgE-positive subjects was highest in the groups with dyspnoea (5/18), cough (6/24) and rhinitis (11/44) whereas only 1 of 11 workers with haemorrhagic rhinitis had such antibodies.
A follow-up study of 23 affected workers was performed after 10 months to assess clinical symptoms, lung function and IgE antibody levels.
This follow-up study showed the absence of obstructive ventilation patterns in three out of six subjects in addition to cessation of symptoms in most initially affected workers who were no longer exposed.
On the other hand, 14 workers under continuous exposure had comparable pathological findings on re-examination.
Mots-clés Pascal : Anhydride organique, Exposition professionnelle, Homme, Industrie chimique, Allemagne, Europe, Rhinite, IgE, Allergie, Toxicité, Fonction respiratoire, Appareil respiratoire pathologie, Médecine travail, Immunopathologie, ORL pathologie, Nez pathologie
Mots-clés Pascal anglais : Organic anhydride, Occupational exposure, Human, Chemical industry, Germany, Europe, Rhinitis, IgE, Allergy, Toxicity, Lung function, Respiratory disease, Occupational medicine, Immunopathology, ENT disease, Nose disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0592613
Code Inist : 002B03L06. Création : 01/03/1996.