Figure 1. Impact of the availability of a molecular typing facility on overall nosocomial infections/1,000 patient days at Northwestern Memorial Hospital. The mean rate during FY93 to FY 94 was 6.49, designated by a heavy horizontal bar. Throughout FY 95 through FY 99, the mean nosocomial infection rate was 5.60/1,000 patient days, represented by the second (lower) heavy horizontal bar.
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