Article
Pseudomonas aeruginosa ceftolozane-tazobactam resistance development requires multiple mutations leading to overexpression and structural modification of AmpC.
Antimicrobial agents and chemotherapy - 1 Jun 2014
Cabot Gabriel, Bruchmann Sebastian, Mulet Xavier, Zamorano Laura, Moyà Bartolomé, Juan Carlos, Haussler Susanne, Oliver Antonio
Abstract excerpt
We compared the dynamics and mechanisms of resistance development to ceftazidime, meropenem, ciprofloxacin, and ceftolozane-tazobactam in wild-type (PAO1) and mutator (PAOMS, ΔmutS) P. aeruginosa. The strains were incubated for 24 h with 0.5 to 64× MICs of each antibiotic in triplicate experiments. The tubes from the highest antibiotic concentration showing growth were reinoculated in fresh medium containing...
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