We evaluated the clinical usefulness of a PCR assay that discriminates Staphylococcus aureus from coagulase-negative staphylococci and detects methicillin resistance on blood cultures by measuring the adaptation of antimicrobial therapy based on the PCR results. Only 7 of 28 patients (25%) benefited from a modification of antibiotic therapy based on the PCR results, since empirical therapy was appropriate in a majority of cases.
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Hallin et al. (2003) studied this question.
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