Abstract:
:This investigation used the postantibiotic effect (PAE) and killing curves to provide data on the antimicrobial activity of subinhibitory (1/8x, 1/4x and 1/2x minimum inhibitory concentration; MIC) and inhibitory (1x MIC) concentrations of amikacin, gentamicin and tobramycin against Pseudomonas aeruginosa. Subinhibitory concentrations (1/4x and 1/2x MIC) of aminoglycosides demonstrated a reproducible PAE. At 1/4x MIC, the order of duration of the PAE was approximately 15 min for all aminoglycosides, while at 1/2x MIC all three aminoglycosides displayed a similar PAE of approximately 40 min. Killing-curve studies demonstrated that subinhibitory concentrations of aminoglycosides either decrease bacterial growth for several hours (1/4x and 1/2x MIC) or produce stasis of growth for several hours (1/8x MIC). Only inhibitory aminoglycoside concentrations (1x MIC) proved to be bactericidal. Subinhibitory concentrations of aminoglycosides decrease bacterial growth and produce a PAE against P. aeruginosa.
journal_name
Chemotherapyjournal_title
Chemotherapyauthors
Zhanel GG,Karlowsky JA,Hoban DJ,Davidson RJdoi
10.1159/000238842subject
Has Abstractpub_date
1991-01-01 00:00:00pages
114-21issue
2eissn
0009-3157issn
1421-9794journal_volume
37pub_type
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