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Int J Antimicrob Agents. 2000 Jun;15(1):25-30.

Comparison of vancomycin pharmacodynamics (1 g every 12 or 24 h) against methicillin-resistant staphylococci.

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1
Department of Pharmacy Practice, School of Pharmacy, The University of Kansas Medical Center, 3901 Rainbow Boulevard, 66160-7231, Kansas City, KS 66160-7231, USA. mlacy@kumc.edu

Abstract

This study compared the duration of serum bactericidal activity for vancomycin, 1 g every 12 or 24 h at steady state, against methicillin-resistant Staphylococcus aureus (MRSA) and coagulase-negative staphylococci (MR-CNS). All four test isolates were susceptible to vancomycin with minimal inhibitory concentration (MIC) values of either 2 or 4 mg/l. Serum bactericidal titres (SBTs) were run in duplicate and serum bactericidal activity (SBA) was defined as the time points at which all subject SBTs were greater than or equal to 1:2. For the every 12-h regimen, SBA was 10-12 h. With the every 24-h regimen, the duration of SBA was 10-16 h for MRSA and 8-10 h for MR-CNS. The pharmacodynamic data suggest that for those with good renal function a Q12h dosing interval is most appropriate for MR-CNS or staphylococcal isolates with MICs of 4.

PMID:
10856673
[Indexed for MEDLINE]
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