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Pharmacology. 2013;91(3-4):214-8. doi: 10.1159/000348572. Epub 2013 Mar 28.

In vitro activity of doripenem plus fosfomycin against drug-resistant clinical blood isolates.

Author information

1
Department of Internal Medicine I, Division of Infectious Diseases and Tropical Medicine, Medical University of Vienna, Vienna, Austria.

Abstract

The in vitro activity of doripenem in combination with fosfomycin was evaluated against a wide range of clinical blood isolates. Bacterial isolates of methicillin-resistant Staphylococcus aureus (MRSA; n = 39), Pseudomonas aeruginosa (n = 18), multidrug-resistant Escherichia coli (n = 10), Enterobacter cloacae (n = 3) and Klebsiella pneumoniae (n = 5) were investigated. For synergism testing the checkerboard test was applied and determined by calculation of the fractional inhibitory concentration index. Checkerboard results were verified by time-kill curve tests on selected isolates. Among MRSA, E. coli and K. pneumoniae, 94.9, 80 and 100% of isolates demonstrated synergism, respectively. Selected isolates demonstrated synergism in time-kill curve tests. P. aeruginosa isolates demonstrated no interaction in all isolates. Doripenem plus fosfomycin shows high efficacy with promising results in vitro.

PMID:
23548688
DOI:
10.1159/000348572
[Indexed for MEDLINE]

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