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Staphylococcus aureus Newman with an insertion mutation in clfB, the gene encoding clumping factor B, only marginally decreased infection rate (P>0.05) in rats with experimental endocarditis. In contrast, clfB complementation on a multicopy plasmid significantly increased infectivity (P<0.05) over the deleted mutants. Although clfB could affect endovascular infection, its importance in experimental endocarditis was limited.
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Entenza et al. (2000) studied this question.
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