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Sulbactam efficacy in experimental models caused by susceptible and intermediate Acinetobacter baumannii strains.

Abstract
Sulbactam and imipenem were compared in an experimental pneumonia model in immunocompetent mice, using a susceptible strain of Acinetobacter baumannii, and in an experimental endocarditis model in rabbits, using an intermediately susceptible strain. In the former, sulbactam was as efficacious as imipenem in terms of survival, sterility of lungs and in the bacterial clearance from lungs and blood, provided that the t > MIC for sulbactam (1.84 h) was similar to that for imipenem (2.01 h). In the endocarditis model, imipenem (t > MIC, 2.12 h) was more efficacious than sulbactam (t > MIC, 1.17 h) in bacterial clearance from vegetations. These results show the efficacy of sulbactam in infections caused by susceptible strains of A. baumannii, with an MIC up to 4 mg/L, provided that doses reach a t > MIC similar to that of imipenem. The activity of sulbactam was time dependent.
AuthorsM J Rodríguez-Hernández, L Cuberos, C Pichardo, F J Caballero, I Moreno, M E Jiménez-Mejías, A García-Curiel, J Pachón
JournalThe Journal of antimicrobial chemotherapy (J Antimicrob Chemother) Vol. 47 Issue 4 Pg. 479-82 (Apr 2001) ISSN: 0305-7453 [Print] England
PMID11266426 (Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Anti-Bacterial Agents
  • Imipenem
  • Sulbactam
Topics
  • Acinetobacter (drug effects)
  • Acinetobacter Infections (blood, drug therapy, microbiology)
  • Animals
  • Anti-Bacterial Agents (pharmacokinetics, pharmacology, therapeutic use)
  • Disease Models, Animal
  • Endocarditis (blood, drug therapy, microbiology)
  • Heart Valves (drug effects, microbiology)
  • Imipenem (pharmacokinetics, pharmacology, therapeutic use)
  • Lung (drug effects, microbiology)
  • Mice
  • Mice, Inbred C57BL
  • Microbial Sensitivity Tests
  • Pneumonia (blood, drug therapy, microbiology)
  • Rabbits
  • Sulbactam (pharmacokinetics, pharmacology, therapeutic use)
  • Survival Rate
  • Time Factors

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