| etiological investigation of farmer's lung disease: a serological study. | to confirm the main etiological antigen of farmer's lung in dafeng county, jiangsu province, people's republic of china, precipitins in serum from 30 patients with farmer's lung were tested with several strains of antigens. reactions against two strains of t.vulgaris were shown in 46.7% and 66.7% of the patients group, which were significantly higher than in the controls, while the percentage of reactions against faenia rectivirgula and a. fumigates were low in the patients group and had no sign ... | 1991 | 1823809 |