Tests of dalbavancin's in vitro activity against 209 aerobic and 120 anaerobic isolates from pretreatment diabetic foot infections showed an MIC90 of <= 0.125 mu g/ml against methicillin-susceptible Staphylococcus aureus (MSSA), methicillin-resistant S. aureus (MRSA), and 120 anaerobes (Clostridium perfringens, other clostridia, Peptoniphilus asaccharolyticus, Finegoldia magna, and Anaerococcus prevotii), compared to respective MIC(90)s for MSSA and MRSA of 0.5 and 1 mu g/ml for vancomycin, 4 and 4 mu g/ml for linezolid, 0.5 and 0.5 mu g/ml for daptomycin, and 0.25 and > 8 mu g/ml for clindamycin.