Group II Scotochromogensの分類についての知見補遺

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Previously, Tsukamura and his associates stated that all of multiple human isolates, sporadic human isolates and soil isolates of slowly growing scotochromogens belong to one species, Mycobacterium scrofulaceum (M. marianum or M. aquae might be suitable for the species name). On the other hand, Wayne et al. stated that pathogenic scotochromogens (scrofula type) and tap water scotochomogens (aquae type) may be different species. To test these two possibilities, the present study was made on the tap water scotochromogens received from Dr. Lawrence G. Wayne, Veterans Administration Hospital, San Fernando, California, in respect to 97 characters previously discribed as well as other 5 characters. In comparison of the tap water scotochromogens with “Hypothetical Mean Organisms” (HMOs) of various mycobacterial species or their subgroups, the tap water scotoc hromogens showed the highest S-value to the HMO of the sporadic human isolate-scotochromogens (according to Tsukamura, a subgroup of M. scrofulaceum). However, these showed also high S-values as high as entering the permissible low limit of some species of Group II and Group III (Tables 1 and 2). These results showed that, although the tap water scotochromogens most resembled the sporadic human isolate-scotochromogens, there remained a possibility that they can belong to other species of the Group II or Group III. It was noteworthy that the S-values for the tap water scotochromogens to the HMO of the sporadic human isolate-subgroup were only 1 per cent higher than those to the HMO of the multiple human isolate-subgroup (Table 1). The absence of clear-cut separation in a numerical comparison between the tap water scotochromogens and the other scotochromogens seem to indicate that these all are regarded as a species. The tap water scotochromogens showed similar features with other scotoch r omogens in respect to the “distinguishing characters of the Group II and Group III, excluding M. fiavescens” (Table 3). The tap water scotochromogens showed similar features with other scotochromogens in respect to the “characters useful for differentiation between subgroups of the Group II and Group III” (Table 4).
日本結核病学会の論文

Group II Scotochromogensの分類についての知見補遺

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