Activities (changes in log10 CFU/g) of daptomycin- or linezolid-containing regimens against Enterococcus faecalis (susceptible to vancomycin, gentamicin, rifampin, daptomycin, and linezolid) (a) and Enterococcus faecium (resistant to vancomycin and rifampin; susceptible to gentamicin, daptomycin, and linezolid) (b).