Abstract
P-fimbriation of Escherichia coli is an important factor in the pathogenesis of childhood pyelonephritis. The present study investigates children with single episodes of symptomatic non-febrile urinary tract infection, i.e. cystitis, with respect to clinical appearance and bacteriology, especially the frequency of P-fimbriated E. coli. The study included 75 children, 57 of whom had their first attack of urinary tract infection. E. coli was the causative agent in 88% (66/75) of the infections, and 48% (32/66) of E. coli strains were P-fimbriated. No association was found between identification of P-fimbriated E. coli at index infection and proneness to reinfection during the following six-month period. It is suggested that P-fimbriated E. coli is a virulence factor even in lower urinary tract infections, when occurring in single, symptomatic episodes.
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