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Mutant prevention concentrations of levofloxacin alone and in combination with azithromycin, ceftazidime, colistin (Polymyxin E), meropenem, piperacillin-tazobactam, and tobramycin against Pseudomonas aeruginosa.

The mutant prevention concentrations (MPCs) of levofloxacin alone and in combination with ceftazidime, colistin (polymyxin E), meropenem, piperacillin-tazobactam, and tobramycin were established against Pseudomonas aeruginosa. Antibiotic combinations using levofloxacin with any antibiotic with individual activity against P. aeruginosa resulted in synergistic lowering (an at-least-fourfold reduction) of the isolate's MPC.

Anti-Bacterial Agents↗

Activities of telithromycin (HMR 3647, RU 66647) compared to those of erythromycin, azithromycin, clarithromycin, roxithromycin, and other antimicrobial agents against unusual anaerobes.

The comparative activity of telithromycin (HMR 3647) against 419 human anaerobic isolates was determined by the agar dilution method. At concentrations of </=0.5 microgram/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.

Anti-Bacterial Agents↗

Activities of a new fluoroketolide, HMR 3787, and its (des)-fluor derivative RU 64399 compared to those of telithromycin, erythromycin A, azithromycin, clarithromycin, and clindamycin against macrolide-susceptible or -resistant Streptococcus pneumoniae and S. pyogenes.

Activities of HMR 3787 and RU 64399 were compared to those of three macrolides, telithromycin, and clindamycin against 175 Streptococcus pneumoniae isolates and 121 Streptococcus pyogenes isolates. HMR3787 and telithromycin were the most active compounds tested against pneumococci. Telithromycin and RU 64399 were equally active against macrolide-susceptible (MICs, 0.008 to 0.06 microg/ml) and -resistant S. pyogenes isolates, but HMR 3787 had lower MICs for ermB strains.

Anti-Bacterial Agents↗

Efficacy of single-dose azithromycin in treatment of acute otitis media in children after a baseline tympanocentesis.

Children with acute otitis media underwent tympanocentesis and were given a single dose of 30 mg of azithromycin/kg of body weight. At day 28, the overall clinical cure rate was 206 of 242 (85%). Clinical cure rates for patients infected with Streptococcus pneumoniae (67 of 76; 88%) and Haemophilus influenzae (28 of 44; 64%) were consistent with historical rates for the 5-day dosing regimen.

Anti-Bacterial Agents↗

Azithromycin.

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Anti-Bacterial Agents↗