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  • Title: Retrospective evaluation of therapies for Staphylococcus aureus endocarditis.
    Author: Gentry CA, Rodvold KA, Novak RM, Hershow RC, Naderer OJ.
    Journal: Pharmacotherapy; 1997; 17(5):990-7. PubMed ID: 9324187.
    Abstract:
    We retrospectively evaluated antiinfective therapy for methicillin-sensitive (MSSA) and methicillin-resistant Staphylococcus aureus (MRSA) endocarditis in 54 patients who had 57 treatment courses for the disease. Three treatments were assessed: 27 nafcillin-treated courses of MSSA endocarditis, 18 vancomycin-treated courses of MSSA endocarditis, and 11 vancomycin-treated courses of MRSA endocarditis. At baseline, patients with MSSA treated with vancomycin had more chronic conditions (p<0.01), a lower frequency of intravenous drug use (p<0.01), a lower hematocrit concentration (p<0.05), and a higher serum creatinine concentration (p<0.05) than the nafcillin group. Vancomycin-treated patients had a higher complication rate during therapy (p<0.05) and a longer duration in an intensive care unit (p<0.01) than the nafcillin group. The trend was for a higher complete response rate in the nafcillin group (74% vs 50%, p=0.12), but no difference in mortality (22% vs 28%, p=0.73). Patients with MRSA infection treated with vancomycin had higher mortality than those with MSSA who received that drug (55% vs 28%, p=0.24). Patients with vancomycin-treated MSSA endocarditis may have a poorer outcome than those who receive nafcillin, but this may be influenced by different or more severe clinical features.
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