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  • Title: Epidemiological comparison of true methicillin-resistant and methicillin-susceptible coagulase-negative staphylococcal bacteremia at hospital admission.
    Author: Tacconelli E, D'Agata EM, Karchmer AW.
    Journal: Clin Infect Dis; 2003 Sep 01; 37(5):644-9. PubMed ID: 12942394.
    Abstract:
    We performed 2 case-control studies among 108 patients with true coagulase-negative staphylococcal (CoNS) bacteremia diagnosed within 48 h of hospital admission. Seventy-nine patients (73%) with methicillin-resistant (MR) CoNS bacteremia and 29 patients (27%) with methicillin-susceptible (MS) CoNS bacteremia were compared with 79 randomly selected control patients without CoNS bacteremia. The presence of a central venous catheter was an independent risk factor for both MR- and MS-CoNS bacteremia (P<.001). Patients with MR-CoNS bacteremia were more frequently admitted from health care facilities (P=.02), more likely to have had previous MR Staphylococcus aureus infection or colonization (P=.02), and more likely to have received antibiotics in the previous 30 days (P=.02). The probability that bacteremia was caused by an MR strain, rather than an MS strain, was 62% among patients admitted from the community and 84% among patients admitted from health care facilities. This study identified epidemiological characteristics that can be used to distinguish between MR- and MS-CoNS bacteremia and found high rates of methicillin resistance among CoNS isolates recovered from patients admitted from the community, as well as from health care facilities.
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