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Antimicrobial Agents and Chemotherapy, November 2001, p. 3253-3255, Vol. 45, No. 11
0066-4804/01/$04.00+0   DOI: 10.1128/AAC.45.11.3253-3255.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Susceptibilities of Eikenella corrodens, Prevotella intermedia, and Prevotella nigrescens Clinical Isolates to Amoxicillin and Tetracycline

N. Luong, J. Tsai, and C. Chen*

Division of Primary Oral Health Care, School of Dentistry, University of Southern California, Los Angeles, California 90089

Received 28 September 2000/Returned for modification 28 February 2001/Accepted 16 July 2001

The AB Biodisk Etest showed that 106 (100%) and 98 (92%) isolates of Eikenella corrodens were susceptible to amoxicillin and tetracycline, respectively. Twenty-three (68%) Prevotella intermedia isolates and 14 (67%) Prevotella nigrescens isolates were susceptible to amoxicillin. Seventy-nine percent of the P. intermedia isolates and 67% of the P. nigrescens isolates were susceptible to tetracycline. A higher percentage of beta -lactamase-producing isolates of P. intermedia and P. nigrescens were identified with selective agar containing amoxicillin than with nonselective agar.

* Corresponding author. Mailing address: DEN 4335, USC School of Dentistry, Division of Primary Oral Health Care, Los Angeles, CA 90089. Phone: (213) 740-1075. Fax: (213) 740-2194. E-mail: ccchen{at}hsc.usc.edu.

Antimicrobial Agents and Chemotherapy, November 2001, p. 3253-3255, Vol. 45, No. 11
0066-4804/01/$04.00+0   DOI: 10.1128/AAC.45.11.3253-3255.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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