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Clinical isolates of Nocardia brasiliensis from Japan exhibit variable susceptibility to the antibiotic imipenem

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Abstract

Clinical isolates of Nocardia brasiliensis from Japan were classified into two groups based on their susceptibility to the carbapenem antibiotic, imipenem (IPM). Of 33 strains tested, 10 belonged to an IPM susceptible group, with MIC of from 0.25 to 2 εg/ml and a MIC80 value of 1.5 εg/ml for this antibiotic. The remaining 23 strains belonged to an IPMresistant group with MIC and MIC80 values of 8–16 εg/ml and >16 εg/ml, respectively. The type strain of N. brasiliensis belonged to this resistant group. Analysis of 16S rDNA genes sequences showed that the IPM susceptible group had characteristic single nucleotide substitutions at positions 103 (T), 381 (A), and 456 (A), in contrast to the IPM resistant group. This grouping, however, was not associated with their clinical manifestation.

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Correspondence to Yuzuru Mikami.

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Kageyama, A., Hoshino, Y., Watanabe, M. et al. Clinical isolates of Nocardia brasiliensis from Japan exhibit variable susceptibility to the antibiotic imipenem. Mycopathologia 158, 275–278 (2004). https://doi.org/10.1007/s11046-005-4487-z

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  • DOI: https://doi.org/10.1007/s11046-005-4487-z

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