TABLE 1.

Microdilution MICs (μg/ml) of 67 MRSA strains

DrugMICs for VSSA strains (n = 33)MIC range for hVISA strains (n = 2)MICs for VISA strains (n = 26)MIC range for VRSA strains (n = 6)
RangeMIC50/MIC90RangeMIC50/MIC90
Telavancin0.25-10.25/0.250.25-0.50.25-10.5/12-4
Vancomycin0.5-11/122-84/8>32
Teicoplanin0.25-20.5/12-81-324/168->32
Daptomycin0.25-10.5/0.50.5-10.5->11/>10.25-1
Linezolid2->44/42-4≤0.5-42/42-4
Telithromycin0.12->80.12/>8>80.06->8>8/>8>8
Oxacillin>4>4/>4>40.5->4>4/>4>4
Quinipristin-dalfopristin0.25-10.5/10.5≤0.12-20.5/10.5-1
Clindamycin≤0.5->4≤0.5/>4>4≤0.5->4>4/>4>4
Ciprofloxacin0.25->80.5/>8>81->8>8/>8>8
Erythromycin2->16>16/>16>160.25->16>16/>16>16
Gentamicin0.25->160.5/10.25-0.50.25->161/>160.5->16
Trimethoprim-sulfamethoxazolea≤0.5->4≤0.5/≤0.5≤0.5≤0.5->4≤0.5/>4≤0.5->4
  • a MICs reported based on trimethoprim concentration.