In vitro activity of temocillin (BRL 17421), a novel beta-lactam antibiotic.

Abstract:

:The minimal inhibitory concentration of temocillin (BRL 17421) against 476 clinical isolates was determined by an agar dilution method. Temocillin was active against most of the Enterobacteriaceae, Haemophilus, and Neisseria strains tested. The compound showed low activity or was inactive against Bacteroides, Campylobacter, Acinetobacter, Pseudomonas, and Staphylococcus aureus strains. Within each species, individual strains showed a high degree of uniformity in their susceptibility to temocillin; the drug concentrations that inhibited the growth of 90% of organisms were the same or close to those which inhibited the growth of 50% of organisms. In contrast, the same strains showed a very wide range of susceptibility to the other antibiotics tested, including third-generation cephalosporins. Against strains of Enterobacteriaceae highly susceptible to third-generation cephalosporins, temocillin was considerably less active than cefotaxime, ceftazidime, and moxalactam, although it was more active than cefazolin and piperacillin. Against certain strains of Enterobacter and Citrobacter resistant to third-generation cephalosporins, temocillin was more active than cefotaxime and ceftazidime. An increase in the inoculum size did not alter the activity of temocillin, indicating that the compound has high stability to beta-lactamases. The minimal lethal concentration was also very similar to the minimal inhibitory concentration when an inoculum of 10(5) colony-forming units was used.

authors

Van Landuyt HW,Pyckavet M,Lambert A,Boelaert J

doi

10.1128/aac.22.4.535

subject

Has Abstract

pub_date

1982-10-01 00:00:00

pages

535-40

issue

4

eissn

0066-4804

issn

1098-6596

journal_volume

22

pub_type

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