In Vitro Activity of an Oral Streptogramin Antimicrobial, XRP2868, against Gram-Positive Bacteria

Abstract
The comparative in vitro potency of XRP2868, a new oral semisynthetic streptogramin antibiotic, was evaluated against gram-positive bacteria. XRP2868 inhibited all staphylococci at ≤1 μg/ml and all nonpneumococcal streptococci at ≤0.25 μg/ml and was fourfold more potent than quinupristin-dalfopristin against Staphylococcus aureus and Enterococcus faecium .