Microbiological and serological studies of farmers' lung in Finland

Abstract

Sera from few Finnish patients with clinical farmers'' lung reacted in precipitin tests with extracts of the thermophilic actinomycetes that commonly cause the disease elsewhere. Hays associated with the disease in Finland showed less evidence of spontaneous heating and contained fewer actinomycete spores than British hays. Only Thermoactinomyces vulgaris was sometimes abundant. Some species of mesophilic fungi were more abundant than in Britain and 1, Aspergillus umbrosus, reacted with most sera from farmers'' lung patients in precipitin tests. A panel of antigens, including thermophilic actinomycetes, A. umbrosus and other species of the A. glaucus group, is recommended for screening farmers'' lung sera.