Comparative in vitro activities and postantibiotic effects of the oxazolidinone compounds eperezolid (PNU-100592) and linezolid (PNU-100766) versus vancomycin against Staphylococcus aureus, coagulase-negative staphylococci, Enterococcus faecalis, and Enterococcus faecium.
The activities of the oxazolidinone antibacterial agents eperezolid (PNU-100592) and linezolid (PNU-100766) were compared with that of vancomycin against clinical isolates of methicillin-susceptible and -resistant Staphylococcus aureus (n = 200), coagulase-negative staphylococci (n = 100), and vancomycin-susceptible and -resistant Enterococcus faecalis and Enterococcus faecium (n = 50). Eperezolid and linezolid demonstrated good in vitro inhibitory activity, regardless of methicillin susceptibility for staphylococci (MIC at which 90% of the isolates are inhibited [MIC90] range, 1 to 4 microg/ml) or vancomycin susceptibility for enterococci (MIC90 range, 1 to 4 microg/ml). In time-kill studies, eperezolid and linezolid were bacteriostatic in action. A postantibiotic effect of 0.8+/-0.5 h was demonstrated for both eperezolid and linezolid against S. aureus, S. epidermidis, E. faecalis, and E. faecium.
Rybak
M J
MJ
The Anti-Infective Research Laboratory, Department of Pharmacy Services, Detroit Receiving Hospital/University Health Center, Wayne State University, Michigan 48201, USA. mrybak@dmc.org
Cappelletty
D M
DM
Moldovan
T
T
Aeschlimann
J R
JR
Kaatz
G W
GW
D000081:Acetamides / Q000494:pharmacology; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D003030:Coagulase / Q000378:metabolism; D013293:Enterococcus faecalis / Q000187:drug effects*; D016984:Enterococcus faecium / Q000187:drug effects*; D006801:Humans; D000069349:Linezolid; D008826:Microbial Sensitivity Tests; D010080:Oxazoles / Q000494:pharmacology; D023303:Oxazolidinones; D013211:Staphylococcus aureus / Q000187:drug effects*; D014640:Vancomycin / Q000494:pharmacology
D000081:Acetamides; D000900:Anti-Bacterial Agents; D003030:Coagulase; D010080:Oxazoles; D023303:Oxazolidinones; D014640:Vancomycin; C098011:eperezolid; D000069349:Linezolid