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Antimicrobial Agents and Chemotherapy, October 2000, p. 2880-2882, Vol. 44, No. 10
0066-4804/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Bactericidal Activity of Quinupristin-Dalfopristin against Staphylococcus aureus: Clindamycin Susceptibility as a Surrogate Indicator

Peter C. Fuchs,* Arthur L. Barry, and Steven D. Brown

The Clinical Microbiology Institute, Wilsonville, Oregon

Received 13 March 2000/Returned for modification 7 June 2000/Accepted 26 July 2000

Of 516 Staphylococcus aureus strains tested, 97.1% were susceptible to quinupristin-dalfopristin, which was bactericidal for 22 (56%) of the 39 strains tested, comparable to vancomycin. All 17 clindamycin and macrolide-resistant strains were inhibited but not killed by quinupristin-dalfopristin, whereas all 22 clindamycin-susceptible strains (5 were macrolide resistant) were killed.


* Corresponding author. Mailing address: The Clinical Microbiology Institute, 9725 SW Commerce Circle, Suite A-1, Wilsonville, OR 97070. Phone: (503) 682-3232. Fax: (503) 682-4548. E-mail: cmi{at}hevanet.com.


Antimicrobial Agents and Chemotherapy, October 2000, p. 2880-2882, Vol. 44, No. 10
0066-4804/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.



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