The diagnosis of urinary tract infection (UTI) in children requires laboratory determination of the invasion and active multiplication of different organisms in the normally sterile urinary tract. Kass in 1956 introduced the concept of significant bacteri-uria as a common denominator of all types of UTI (1). Since then, emphasis has been made on the need to use strict criteria for the interpretation of quantitative cultures in order to prevent over-diagnosing or underdiagnosing of UTI. Unnecessary expenses, medications, irradiation from extensive radiological workup, and even urologic surgery, are some of the consequences of overdiagnosing. Progressive renal damage could be the result of not detecting in time a congenital anomaly associated with UTI. This subject will be reviewed here in an attempt to give general guidelines on the role played by bacteriology in UTI.
KeywordsUrinary Tract Infection Serratia Marcescens Recurrent Urinary Tract Infection Acute Pyelonephritis Asymptomatic Bacteriuria
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