In vitro activities of 39 antimicrobial agents for Branhamella catarrhalis and comparison of results with different quantitative susceptibility test methods.

Antimicrobial susceptibility testing of Haemophilus influenzae, Branhamella catarrhalis, and Neisseria gonorrhoeae.

Comparative in vitro activity of telithromycin against macrolide-resistant and -susceptible Streptococcus pneumoniae, Moraxella catarrhalis and Haemophilus influenzae.

OBJECTIVES The first objective was to investigate the in vitro activity of telithromycin against respiratory tract pathogens in comparison with other antimicrobial agents. The second objective was to identify the influence of the erm(B) and mef(A) genes on the susceptibility of Streptococcus pneumoniae to telithromycin. METHODS The in vitro activity of telithromycin against S. pneumoniae, Mor...

Disk diffusion susceptibility testing of Branhamella catarrhalis with ampicillin and seven other antimicrobial agents.

A total of 74 clinical isolates of Branhamella catarrhalis were characterized with respect to their ampicillin, amoxicillin-clavulanate, cephalothin, cefaclor, erythromycin, tetracycline, chloramphenicol, and trimethoprim-sulfamethoxazole MICs and zones of inhibition. Disk diffusion tests were performed according to the guidelines of the National Committee for Clinical Laboratory Standards with...

Comparison of the activity of cefixime and activities of other oral antibiotics against adult clinical isolates of Moraxella (Branhamella) catarrhalis containing BRO-1 and BRO-2 and Haemophilus influenzae.

MICs of 10 oral antibiotics were determined for 105 Moraxella catarrhalis and 96 Haemophilus influenzae isolates from adults. A two- to fourfold increase in MICs of oral cephalosporins was seen in the presence of BRO-1 but not with TEM-1 or BRO-2. The MICs of cefixime for 90% of strains of H. influenzae (0.125 microgram/ml) and M. catarrhalis (0.25 microgram/ml) were 8- to 64-fold lower than th...

Tetracycline and erythromycin resistance among clinical isolates of Branhamella catarrhalis.

We reviewed tetracycline and erythromycin disk diffusion susceptibility of 457 isolates of Branhamella catarrhalis. Four isolates were resistant to tetracycline, with MICs for two available isolates of 16 micrograms/ml. Sixteen isolates were in the moderately susceptible range for erythromycin, with an MIC for one available isolate being greater than 8 micrograms/ml. These are the first tetracy...