Enhanced activity of the combination of penicillin G and gentamicin against penicillin-resistant viridans group streptococci

Author:

Cercenado E1,Díaz M D1,Sánchez-Carrillo C1,Vicente T1,Bernaldo de Quirós J C1

Affiliation:

1. Servicio de Microbiología, Hospital General Universitario Gregorio Marañón, Madrid, Spain.

Abstract

We evaluated the effects of the combination of penicillin G and gentamicin against 10 penicillin-resistant bacteremic isolates of viridans group streptococci for which the MICs of penicillin were 4 to 64 micrograms/ml. In time-kill studies, the combination resulted in more killing of eight isolates for which the MICs of penicillin were from 8 to 64 micrograms/ml than any of the antimicrobial agents tested alone. In general, clearly enhanced antimicrobial activity was observed with the combination.

Publisher

American Society for Microbiology

Subject

Infectious Diseases,Pharmacology (medical),Pharmacology

Reference15 articles.

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3. Resistance to penicillin-streptomycin synergy among clinical isolates of viridans group streptococci;Farber B. F.;Antimicrob. Agents Chemother.,1983

4. Prevalence of penicillin-resistant viridans group streptococci in healthy children and in patients with malignant haematological disorders;Guiot H. F. L.;Eur. J. Clin. Microbiol. Infect. Dis.,1994

5. Concomitant high-level vancomycin and penicillin resistance in clinical isolates of enterococci;Handwerger S.;Clin. Infect. Dis.,1992

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