[Epidemiological study of atypical mycobacteriosis in Okayama prefecture]

In order to understand the epidemiology of atypical mycobacteriosis, patients who were cancelled from registration in tuberculosis surveillance and those who were diagnosed as having atypical mycobacteriosis were compared. The results were as follows in: 1) The proportion of female patients was greater for atypical mycobacteriosis than for tuberculosis. 2) No case of atypical mycobacteriosis resulting from contact infection was detected. Therefore, atypical mycobacteriosis dose not appear to be transmitted by direct person-to-person contact under ordinary conditions. 3) There were fewer cases of atypical mycobacteriosis with cavities than of tuberculosis. 4) There was no correlation between the incidence of atypical mycobacteriosis was higher to tuberculosis incidence. 5) The incidence of atypical mycobacteriosis was higher in the southern part of Okayama prefecture than in the northern part.