Impact of two-component regulatory systems PhoP-PhoQ and PmrA-PmrB on colistin pharmacodynamics in Pseudomonas aeruginosa

Neang S Ly, Jenny C Yang, Jurgen Bernd Bulitta, Brian Tsuji

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The in vitro pharmacodynamics of colistin against Pseudomonas aeruginosa PAO1 wild-type and isogenic knockout strains of phoP and pmrA were evaluated. Colistin killing at subinhibitory concentrations was greater against the phoP and pmrA mutants than the wild type within the first 8 h: the concentration that results in 50 of maximal effect (EC 50) of the pmrA mutant (0.413 mg/liter) was less than that of the wild type (0.718 mg/liter) (P
Original languageEnglish
Pages (from-to)3453 - 3456
Number of pages4
JournalAntimicrobial Agents and Chemotherapy
Issue number6
Publication statusPublished - 2012

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