Emergence of optrA-mediated linezolid-resistance in human clinical Enterococcus faecalis: an alert for a shifting resistance landscape in hospitals.
OBJECTIVE The emergence of transferable linezolid resistance genes as optrA represents an increasing concern. This study characterizes the first optrA-positive E. faecalis (Efs) isolates associated with human infections in Portugal, while highlighting undetected colonization as a reservoir for dissemination within heal...