[Study of organisms isolated from non-infected patients with pneumoconiosis]

Studies on the sputum organisms and their seasonal incidences were conducted on non-infected patients with pneumoconiosis. A total of 3318 organisms were isolated from 1427 sputum examinations, an average of 4 examinations per patient. alpha-Streptococcus, GPC, Neisseria and GNC were isolated in 74.1, 22.1, 64.8, 21.3% of the patients respectively. In addition, organisms to cause respiratory infection were isolated in the non-infected phase. S. pneumoniae, S. aureus, B. catarrhalis, H. influenzae, E. coli, K. pneumoniae and P. aeruginosa were isolated in 1.5, 5.1, 2.5, 3.3, 2.9, 6.4, 2.8% of the patients respectively. Studies of the seasonal incidences in these organisms showed that H. influenzae, B. catarrhalis and S. pneumoniae were isolated mostly in winter, S. aureus mostly in spring, E. coli and K. pneumoniae mostly in summer. On the other hand, P. aeruginosa showed no seasonal incidence. In relation to the causing organisms of respiratory infection with pneumoconiosis, it is very interesting that many organisms were isolated in the non-infected phase, and seasonal incidences were observed.