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Antimicrobial Agents and Chemotherapy, Dec 1996, 2884-2886, Vol 40, No. 12
GV Doern, AB Brueggemann, G Pierce, T Hogan, HP Holley Jr and A Rauch
Seven hundred twenty-three isolates of Moraxella catarrhalis obtained from
outpatients with a variety of infections in 30 medical centers in the
United States between 1 November 1994 and 30 April 1995 were characterized
in a central laboratory. The overall rate of beta- lactamase production was
95.3%. When the National Committee for Clinical Laboratory Standards MIC
interpretive breakpoints for Haemophilus influenzae were applied,
percentages of strains found to be susceptible to selected oral
antimicrobial agents were as follows: azithromycin, clarithromycin, and
erythromycin, 100%; tetracycline and chloramphenicol, 100%;
amoxicillin-clavulanate, 100%; cefixime, 99.3%; cefpodoxime, 99.0%;
cefaclor, 99.4%; loracarbef, 99.0%; cefuroxime, 98.5%; cefprozil, 94.3%;
and trimethoprim-sulfamethoxazole, 93.5%.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
Prevalence of antimicrobial resistance among 723 outpatient clinical isolates of Moraxella catarrhalis in the United States in 1994 and 1995: results of a 30-center national surveillance study
Clinical Microbiology Laboratories, University of Massachusetts, Worcester 01655, USA.
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