Abstract
Urinary tract infection is one of the most common problems of both pediatric and adult practice. It may either be overt (symptomatic) or covert (asymptomatic). Overt infections may either be self-evident or present with signs and symptoms more typical of other common diseases. Covert infections are discovered either by serendipity or by screening of asymptomatic populations. A working knowledge of populations at risk greatly facilitates diagnostic effort and planning for intelligent screening methods.