Epidemiologic Studies of Lung Disease Due to Mycobacteria Other than Mycobacterium tuberculosis in Japan

The incidence of lung disease due to mycobacteria other than Mycobacterium tuberculosis (atypical mycobacteria) in Japan was estimated to be 0.9-1.9 per 10⁵ population per year in 1971-1979. Although the incidence of lung tuberculosis is steadily decreasing, the incidence of lung disease due to atyp...

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Bibliographic Details
Published in:Reviews of infectious diseases 1981-09, Vol.3 (5), p.997-1007
Main Authors: Tsukamura, M, Shimoide, H, Kita, N, Kawakami, K, Ito, T, Nakajima, N, Kondo, H, Yamamoto, Y, Matsuda, N, Tamura, M, Yoshimoto, K, Shirota, N, Kuse, A
Format: Article
Language:English
Subjects:
Atypical mycobacteria
Epidemiology
Fungal infections
Fungal lung diseases
Humans
Infections
Japan
Lung diseases
Lungs
Mycobacterium
Mycobacterium avium-intracellulare
Mycobacterium fortuitum
Mycobacterium Infections, Nontuberculous - epidemiology
Mycobacterium kansasii
Mycobacterium tuberculosis
Nontuberculous Mycobacteria - isolation & purification
Pulmonary tuberculosis
Session V: Epidemiology
Tuberculosis, Pulmonary - epidemiology
Tuberculosis, Pulmonary - etiology
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Summary:The incidence of lung disease due to mycobacteria other than Mycobacterium tuberculosis (atypical mycobacteria) in Japan was estimated to be 0.9-1.9 per 10⁵ population per year in 1971-1979. Although the incidence of lung tuberculosis is steadily decreasing, the incidence of lung disease due to atypical mycobacteria has remained at almost the same level. The number of patients newly infected per year in recent years was calculated to be ∼2,000. The ratio of the number of patients with lung disease due to atypical mycobacteria to the number of patients with lung disease due to all species of mycobacteria was highest in hospitals on the southwest coast of the Pacific. The atypical mycobacteria that caused disease most frequently belonged to the Mycobacterium avium-intracellulare complex. Of the 537 cases of disease due to atypical mycobacteria, 491 (89.6%) were due to these organisms; 43 (8.0%), to Mycobacterium kansasii; and 7 (1.3%), to Mycobacterium fortuitum. The disease due to M. kansasii appeared most frequently in hospitals in the Tokyo and Kanagawa prefectures. Patients with lung tuberculosis had a high risk of lung infection due to M. avium-intracellulare. The incidence of such disease in tuberculous patients was estimated to be 18.7 per 10⁵ population per year, a rate that is ∼10 times that found in the general population.
ISSN:0162-0886