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  • Title: Correlates of therapeutic efficacy in experimental methicillin-resistant Staphylococcus aureus endocarditis.
    Author: Bayer AS, Greenberg DP, Yih J.
    Journal: Chemotherapy; 1988; 34(1):46-55. PubMed ID: 3162413.
    Abstract:
    Seventy animals with experimental aortic valve endocarditis due to methicillin-resistant Staphylococcus aureus (MRSA) were randomized to receive: no therapy; pefloxacin 40 or 80 mg/kg/day i.v.; or vancomycin 30 mg/kg/day i.v. Vancomycin caused a more rapid decrease in intravegetation MRSA counts than pefloxacin at 40 or 80 mg/kg/day (p less than 0.001, p less than 0.05, respectively, therapy day 3). The major correlate of therapeutic efficacy in this study was the significantly higher mean intravegetation levels achieved by vancomycin (16.8 +/- 6.1 micrograms/g) versus those attained by pefloxacin therapy at either 40 (1.6 +/- 0.13 micrograms/g) or 80 mg/kg/day (2.8 +/- 0.53 micrograms/g, p less than 0.005, p less than 0.025, respectively).
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