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  • Title: Numerical analysis of the taxonomy of Nocardiae and Rhodococci.
    Author: Tsukamura M.
    Journal: Microbiol Immunol; 1982; 26(12):1101-19. PubMed ID: 6763136.
    Abstract:
    The genera Nocardia and Rhodococcus were clearly differentiated in the present study. Eleven characteristics were shown to be useful for differentiation between these two genera. Nocardia asteroides sunsu stricto previously defined by Tsukamura was divided into two taxa. One contained the type strain and was considered to retain the name Nocardia asteroides in a new sense. Another was named in the present study as Nocardia nova sp. nov. Tsukamura. The type strain of this species is ATCC 33726. The following seven characters were useful for differentiating N. nova from newly defined N. asteroides: 1) arylsulfatase activity after 14 days; 2) catalase activity (semiquantitative); 3) beta-esterase activity; 4) pyrazinamidase activity; 5) utilization of citrate as a sole source of carbon; 6) utilization of 2,3-butylene glycol as a sole carbon source; and 7) resistance to 5-fluorouracil (20 micrograms/ml). The name Nocardia farcinica for Tsukamura's Kyoto-I group should be rejected. This taxon has been named Nocardia paratuberculosis sp. nov. Tsukamura. The type strain is ATCC 23826. Three new species of the genus Rhodococcus were proposed: Rhodococcus aichiensis sp. nov. Tsukamura (type strain, ATCC 33611); Rhodococcus chubuensis sp. nov. Tsukamura (type strain, ATCC 33609); Rhodococcus obuensis sp. nov. Tsukamura (type strain, ATCC 33610).
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