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Antimicrobial Agents and Chemotherapy, November 1999, p. 2801-2805, Vol. 43, No. 11
0066-4804/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Activities of Telithromycin (HMR 3647, RU 66647) Compared to Those of Erythromycin, Azithromycin, Clarithromycin, Roxithromycin, and Other Antimicrobial Agents against Unusual Anaerobes

Ellie J. C. Goldstein,1,2,* Diane M. Citron,1 C. Vreni Merriam,1 Yumi Warren,1 and Kerin Tyrrell1

The R. M. Alden Research Laboratory, Santa Monica-UCLA Medical Center, Santa Monica, California 90404,1 and the UCLA School of Medicine, Los Angeles, California 900242

Received 2 March 1999/Returned for modification 6 June 1999/Accepted 25 August 1999

The comparative activity of telithromycin (HMR 3647) against 419 human anaerobic isolates was determined by the agar dilution method. At concentrations of <= 0.5 µg/ml, telithromycin was active against Actinomyces israelii, Actinomyces odontolyticus, Bacteroides tectum, Bacteroides ureolyticus, Bacteroides gracilis (now Campylobacter gracilis), Porphyromonas spp. (including Porphyromonas gingivalis and Porphyromonas macacae), Prevotella intermedia, Prevotella heparinolytica, and almost all Peptostreptococcus species. Clostridia showed species and strain variability, often with a biphasic pattern. Fusobacterium species, except Fusobacterium russii, were relatively resistant.


* Corresponding author. Mailing address: 2021 Santa Monica Blvd., Suite 640E, Santa Monica, CA 90404. Phone: (310) 315-1511. Fax: (310) 315-3662. E-mail: EJCGMD{at}aol.com.


Antimicrobial Agents and Chemotherapy, November 1999, p. 2801-2805, Vol. 43, No. 11
0066-4804/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.



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