Clinical Microbiology Laboratories
Anti-Bacterial Agents; Drug Resistance, Microbial; Humans; Microbial Sensitivity Tests; Moraxella (Branhamella) catarrhalis; purification; Neisseriaceae Infections; Population Surveillance; United States
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%.
Antimicrob Agents Chemother. 1996 Dec;40(12):2884-6.
Antimicrobial agents and chemotherapy
Doern, Gary V.; Brueggemann, Angela B.; Pierce, G; Hogan, Tricia; Holley, H. Preston Jr.; and Rauch, Alan, "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" (1996). Open Access Articles. 186.