Activity of Three Aminoglycosides and Two Penicillins Against Four Species of Gram-Negative Bacilli
AUTOR(ES)
Weinstein, Ralph J.
RESUMO
Three aminoglycoside antibiotics and two penicillins were compared for their in vitro activity against 60 isolates of Serratia, Pseudomonas, Proteus mirabilis, and indole-positive Proteus sp. Testing was done by the agar dilution method using Mueller-Hinton broth solidified with 1.5% agar. The activity of amikacin, aminodeoxybutirosin, and gentamicin against Proteus and Pseudomonas, as related to their peak blood levels, showed no significant differences. Amikacin was the most active against Serratia marcescens. Results using Mueller-Hinton media in broth dilution tests correlated with the agar dilution method except for Pseudomonas aeruginosa. The minimal inhibitory concentration for aminoglycosides in agar was considerably greater than the minimal inhibitory concentration in Mueller-Hinton broth, and the disparity was related to the higher divalent cation concentration of agar. BL-P1654 and carbenicillin were similar except that carbenicillin was much more active against indole-positive Proteus sp. Additionally, the ratio of bactericidal to bacteriostatic concentrations of BL-P1654 was considerably greater than for carbenicillin.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=429099Documentos Relacionados
- Comparative in vitro activity of moxalactam, cefotaxime, cefoperazone, piperacillin, and aminoglycosides against gram-negative bacilli.
- INACTIVATION OF SOME SEMISYNTHETIC PENICILLINS BY GRAM-NEGATIVE BACILLI
- Synergistic Activity of Trimethoprim and Amikacin Against Gram-Negative Bacilli
- In Vitro Activity of Carbenicillin Against Gram-negative Bacilli
- Statistical comparison of the antibacterial activities of broad-spectrum penicillins against gram-negative bacilli.