In vitro and in vivo activities of KRM-1648, a newly synthesized benzoxazinorifamycin, against Mycobacterium marinum

Yamamoto, Y.; Saito, H.; Tomioka, H.; Sato, K.; Yamane, T.; Yamashita, K.; Hosoe, K.; Hidaka, T.

Zentralblatt für Bakteriologie International Journal of Medical Microbiology 277(2): 204-209


ISSN/ISBN: 0934-8840
PMID: 1520979
DOI: 10.1016/s0934-8840(11)80614-6
Accession: 040388510

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The in vitro and in vivo activities of KRM-1648, one of the newly synthesized benzoxazinorifamycins, against M. marinum were compared with those of rifampin. The MIC values of KRM-1648 determined by the agar dilution method on 7H11 medium against 10 strains of M. marinum were 32-128 times and even more below those of rifampin. In an in vivo experiment, KRM-1648 was markedly effective in terms of the incidence of gross skin lesions and the number of CFUs in the lungs and spleen. Its efficacy was much greater than that of rifampin.