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  • Title: Effect of sulbactam on infections caused by imipenem-resistant Acinetobacter calcoaceticus biotype anitratus.
    Author: Urban C, Go E, Mariano N, Berger BJ, Avraham I, Rubin D, Rahal JJ.
    Journal: J Infect Dis; 1993 Feb; 167(2):448-51. PubMed ID: 8421178.
    Abstract:
    A recent outbreak of multiresistant strains of Acinetobacter calcoaceticus biotype anitratus was observed mostly, but not exclusively, in the surgical intensive care unit in our hospital. Disk diffusion and microdilution susceptibility studies demonstrated resistance to imipenem, all aminoglycosides, and all individual beta-lactam antibiotics. Only ampicillin plus sulbactam, cefoperazone plus sulbactam, and polymyxin produced zone sizes and MICs in the susceptible ranges. Determination of MICs and MBCs demonstrated that sulbactam was the antimicrobial agent responsible for the killing of these organisms. Nine of 10 patients who were infected with imipenem-resistant Acinetobacter strains and received ampicillin plus sulbactam for > 3 days improved clinically, and in many cases organisms were eradicated from the site of isolation.
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