MRSA Research Today is a free monthly online journal that collates and summarizes the latest research about MRSA, including details on methicillin-resistant staphylococcus aureus, hospitals, infection, antibiotic resistance, superbugs.

Unexpected antimicrobial effect of statins.

Jerwood S, Cohen J

Department of Microbiology and Infectious Diseases, Royal Sussex County Hospital, Eastern Road, Brighton BN2 5BE, UK.

OBJECTIVES: Epidemiological studies of statins have suggested a link between statin therapy and a decreased risk of sepsis. It has been proposed that the mechanism underlying this apparent protective effect of statins relates to their known immunomodulatory and anti-inflammatory effects. The aim of this study was to explore the antimicrobial effect of statins. METHODS: Simvastatin (Merck) and fluvastatin (Novartis) were both tested against six of each of methicillin-susceptible and -resistant Staphylococcus aureus (MSSA + MRSA), and vancomycin-sensitive and -resistant enterococci (VSE + VRE) using a microtitre dilution method. The test was repeated five times for both statins against all 24 isolates. Vancomycin, linezolid and propranolol were used as controls, as appropriate. RESULTS AND DISCUSSION: Simvastatin showed a significant antimicrobial effect against MSSA (mean MIC 29.2 mg/L) and to a lesser extent against MRSA (mean MIC 74.9 mg/L). Fluvastatin had a significantly less marked antimicrobial effect. Propranolol showed no antimicrobial effect. Simvastatin has a considerable antimicrobial effect in vitro and further testing of it is warranted.

Published 21 January 2008 in J Antimicrob Chemother, 61(2): 362-4.
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