Staphylococcus aureus bacteriuria

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Abstract
Episodes (127) of S. aureus bacteriuria were reviewed retrospectively in 2 hospitals to establish the rate of occurrence, clinical importance and associated predisposing factors. S. aureus was an infrequent urinary isolate and accounted for only about 1% of all positive urine cultures. Although almost all cases in a Veterans Hospital occurred in elderly men, episodes in a community hospital were observed in women and children as well. Patients usually had pyuria (71%), but only 39% had urinary symptoms or fever. Among predisposing factors, serious underlying diseases were uncommon, but urinary tract manipulations or abnormalities were present in nearly 2/3 of the patients. Fifty-five percent of cases were nosocomial and 73% of these were associated with urinary catheterization or other invasive urinary tract procedures. Most patients (61%) were not treated for their bacteriuria and there was a secondary bacteremia rate of 5.5% in the Veterans Hospital. Although infrequently encountered, the presence of S. aureus in urine should be treated with at least as much concern as more frequently encountered bacteria.

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