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False daptomycin-nonsusceptible MIC results by Microscan panel PC 29 relative to Etest results for Staphylococcus
Elizabeth L Palavecino1, Jacqueline M Burnell
1Department of Pathology, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA. epalave@wakehealth.edu
Abstract:
This study correlated the daptomycin MIC results obtained by Microscan and by Etest in Staphylococcus aureus and enterococci and found that the Microscan panel GP 29 had a high rate of false nonsusceptible results. Of the isolates interpreted as nonsusceptible by Microscan, 87% of Staphylococcus aureus, 90% of Enterococcus faecalis, and 88% of Enterococcus faecium isolates were interpreted as susceptible by Etest. In turn, Etest also has false nonsusceptible results compared to reference methods.
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