In vitro activity of the semisynthetic glycopeptide amide MDL 63,246

The in vitro activity of the semisynthetic glycopeptide amide MDL 63,246 against 293 U.S. clinical isolates of gram-positive cocci was determined by the broth microdilution method. When compared with teicoplanin, MDL 63,246 had improved activity against Staphylococcus epidermidis (MICs that inhibited 90% strains tested [MIC90s], 0.25 versus 8 micrograms/ml, respectively). Staphylococcus haemolyticus (MIC90s, 1 versus 32 micrograms/ml, respectively), and VanA Enterococcus faecium (MIC90s, 32 versus > or = 1,024 micrograms/ml, respectively).