Group II Scotochromogen富田株 (SJ-7) のMycobacterium szulgaiとしての同定

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In 1958, Kozuki et al. (abstract, Kekkaku, 34: 605, 1959) reported a case of a 23 year-old female, who excreted frequently Group II scotochromogens in her sputum and showed a cavitary lesion in lungs, at the Kinki Regional Meeting of the Japanese Society for Tuberculosis. This strain was sent to our laboratory. In 1966, the strain was shown to differ significantly from other Group II mycobacteria that caused lung disease in patients and was deposited in the National Collection of Type Cultures, London (NCTC 10428) as M. tomidae (Tsukamura, M.: J. Gen. Microbiol., 45: 253, 1966). However, the name of M. tomidae was not published validly, as a possible new species contained only one strain. Recently, the present authors received the strain from Dr. P. A. Jenkins as unkown of the species, and identified it as M. szulgai. The same strain (13012) that was lyophilized for 12 years was tested again and this also was shown to be M. szulgai (Table 1). The case, ‘Tomida’, is probably the first case of lung disease due to M. szulgai in this country. The name M. tomidae was not validly published and, therefore, the name M. szulgai has the priority for the species.