Coagulase-Negative Staphylococcal Bacteremia in the Changing Neonatal Intensive Care Unit Population

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Abstract
A fivefold increase in the number of cases of nosocomial coagulase-negative staphylococcal bacteremia was investigated in a neonatal intensive care unit between 1975 and 1982. This apparent outbreak was not the result of increased isolation of coagulase-negative staphylococci from blood cultures nor an increased frequency with which blood cultures were obtained. Rather, it was attributable to a dramatic increase in the overall probability that a positive blood culture would be interpreted as "bacteremia" as opposed to a contaminant by both physicians and infection control staff. Specifically, there had been a 62.3% increase in neonatal intensive care unit bed use by very-low-birth-weight (JAMA1987;258:2548-2552)