Abstract
Linezolid is considered for treatment of central nervous system (CNS) infections caused by multidrug-resistant Gram-positive bacteria. Therefore, the influence of cerebrospinal fluid (CSF) on the antimicrobial activity of linezolid was evaluated in vitro. Time-kill curves were conducted in CSF and Mueller-Hinton broth (MHB) using Staphylococcus aureus (ATCC 29213) and Staphylococcus epidermidis (ATCC 12228) strains. In CSF lower linezolid concentrations were needed against S. aureus (1× MIC) and S. epidermidis (0.5× MIC) to achieve bacteriostasis than in MHB (4× MIC for both strains). Good activity of linezolid in CSF supports performance of clinical trials evaluating its potential for treatment of CNS infections.
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