Stopped: poor accrual
Inpatients will be prospectively have nares screened and MRSA strains collected. All clinical MRSA strains of patients will also be prospectively collected. A sensitive strain discrimination test of spa typing will be used to determine if the strains are related. Hypotheses are 1. Strain colonization durations vary and may be very short in days to weeks. 2. Colonizing strains rarely infect 3) Both 1 and 2 may be affected by the patient's co-morbidity.
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Percent of infection strains which were also colonizer earlier
Timeframe: 3 years