Three selective chromogenic culture media (CHROMagars ESBL, CTX-M and KPC) were evaluated for their ability to support the growth of nine Klebsiella pneumoniae isolates producing OXA-48 carbapenemase in combination with other β-lactamases. CHROMagar ESBL and CHROMagar KPC were the most sensitive media, supporting growth of all isolates with a detection limit as low as < 100 CFU/ml. Five isolates failed to grow on CHROMagar CTX-M, and five were recovered on CHROMagar KPC only at counts > 106 CFU/ml. Both CHROMagar ESBL and CHROMagar KPC may be useful for enhanced isolation of K pneumoniae producing OXA-48-like carbapenemases.
- Antimicrobial Resistance
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