Mycobacterium intracellulare肺感染症のX線像

(一次感染と二次感染)

抄録

There are two types of lung infection due to Mycobacterium intracellulare; primary and secondary infection. The first type is infection of healthy lungs with the organism, and the second is the infection at the site of tuberculous cavities from which tubercle bacilli have disappeared.
Corresponding to two types of infection mentioned above there seem two types of roentgenographic features in the lung disease due to this organism.
Roentgenographic feature of primary infection is a cavity without pericavitary inflammation or a round lesion with partial liquefaction which later becomes a cavity. A bulla-like, very thinwalled cavity is a final feature of such cavity. The lesion may occur as progressive caseous inflammation. Characteristics of the lesion are (a) great tendency to caseation and (b) lack of fibrosis.
Roentgenographic feature of secondary infection is similar not distinguished f r om that of chronic cavitary tuberculosis. The lesions appear usually as cavities in sclerotic lesions. Characteristics of the feature of the pre-existing tuberculosis are not significantly modified by later infection with M. intracellulare.