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Antimicrobial Agents and Chemotherapy, May 2000, p. 1394-1396, Vol. 44, No. 5
0066-4804/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Vancomycin and Oxacillin Synergy for Methicillin-Resistant Staphylococci

Beth E. Domaracki, Ann M. Evans, and Richard A. Venezia*

Department of Pathology and Laboratory Medicine, Albany Medical Center, Albany, New York 12208

Received 29 July 1999/Returned for modification 26 November 1999/Accepted 17 February 2000

An increase in oxacillin activity was observed against methicillin-resistant coagulase-negative staphylococci (MRCNS) and methicillin-resistant Staphylococcus aureus (MRSA) in the presence of a sub-MIC of vancomycin. Vancomycin and oxacillin were synergistic against 14 of 21 strains of MRCNS and MRSA. A pattern of enhanced killing was also supported by time-kill studies. These results suggest that combinations of sub-MICs of vancomycin and oxacillin may have therapeutic benefits against methicillin-resistant staphylococci.


* Corresponding author. Mailing address: Department of Pathology and Laboratory Medicine, Albany Medical Center, A-22, Albany, NY 12208. Phone: (518) 262-3506. Fax: (518) 262-4337. E-mail: VENEZIR{at}MAIL.AMC.EDU.


Antimicrobial Agents and Chemotherapy, May 2000, p. 1394-1396, Vol. 44, No. 5
0066-4804/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.



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