In vitro activity of PBTZ169 against multiple Mycobacterium species [Mechanisms of Resistance]

In this study, we demonstrate that PBTZ169 exhibits significant differences in in vitro activity against multiple Mycobacterium species. The amino acid polymorphism at codon 387 of DprE1 can be used as a surrogate marker for in vitro susceptibility to PBTZ169 in mycobacteria. In addition, the amino acid substitution at codon 154 in DprE1 may be associated with acquired resistance to PBTZ169 in the M. fortuitum mutants.

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