OCCUPATIONAL BIRD MITE DERMATITIS (GAMASOIDOSIS) AMONG WORKERS IN A SEED HOUSE.

Among the occupational skin diseases, bird mite dermatitis (gamasoidosis) is an infrequent and under-reported condition. A report is presented of a group of workers employed in a habitat restoration centre who developed episodes of pruritus and skin rashes associated with bird mites. The mite bites resolved approximately two weeks after each episode, without specific medical intervention and despite ongoing work activities. A workplace health-risk assessment and microscopic analysis of 'swabs' of the work environment aided the identification of bird mite as the causative agent. The source of the bird mites was infested red-winged starlings nesting in the roof of the workplace facility. Incidents of gamasoidosis as described are considered occupational dermatoses since they were acquired in the workplace and the diagnosis was based on clinical--parasitological analysis. When diagnosing gamasoidosis, the clinical history and physical examination provide useful clues, but the clinical features of skin lesions of arthropod or other insect bites are very similar. Microscopic detection of the mite is confirmatory. [ABSTRACT FROM AUTHOR]