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Activity of daptomycin against multi-resistant Gram-positive bacteria including enterococci and Staphylococcus aureus
A P Johnson1, S Mushtaq, M Warner
1Antibiotic Resistance Monitoring and Reference Laboratory, Health Protection Agency, Specialist and Reference Microbiology Division, Colindale, London NW9 5HT, UK. alan.johnson@hpa.org.uk
Abstract:
The activity of daptomycin was assessed against 545 isolates of Gram-positive bacteria including enterococci, coagulase-positive and -negative staphylococci, beta-haemolytic streptococci, viridans streptococci and coryneforms. The panel of isolates was biased towards those with resistance to first-line antimicrobial agents and included linezolid-resistant enterococci and Staphylococcus aureus. MICs of daptomycin were < or =1mg/l for all the staphylococci, streptococci, and coryneforms, except for two isolates of Corynebacterium aquaticum, for which MICs were 8 mg/l. Daptomycin MICs were < or =2 and < or =4 mg/l for Enterococcus faecalis and Enterococcus faecium, respectively.
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