A Pilot Study on Farmer's lung…An Examination of Precipitating Antibody Positive Group to Thermophilic actinomyces

Five hundred and fifty-six persons associated with dairy farming were surveyed by means of a questionnaire for evidence of farmer's lung. Two hundred and eighty-four of them were evaluated with serological study. Any typical symptom of farmer's lung was not found but precipitating antibody to Thermoactinomyces vulgaris was identified in sera from fifty-five (19.4%). The subjects of the antibody positive group have more frequently cough with phlegm than negative group.