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We evaluated ceftobiprole against the well-characterized Enterococcus faecalis strain OG1RF (with and without the β-lactamase [Bla] plasmid pBEM10) in a murine urinary tract infection (UTI) model. Ceftobiprole was equally effective for Bla(+) and Bla(-) OG1 strains, while ampicillin was moderately to markedly (depending on the inoculum) less effective against Bla(+) than Bla(-) OG1 strains. These data illustrate an in vivo effect on ampicillin of Bla production by E. faecalis and the stability and efficacy of ceftobiprole in experimental UTI.
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Singh et al. (2012) studied this question.
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