Clinical evidence: Urinary tract infection in children

This review of the effects of treatment for urinary tract infection in children and of preventive interventions is one of over 60 chapters in the first issue of Clinical Evidence , published by the BMJ Publishing Group. #### Key messages Definition: Urinary tract infection is defined by the presence of a pure bacterial growth >105 colony forming units/ml. Lower counts of bacteria may be clinically important, especially in boys and in specimens obtained by urinary catheter. Any growth of typical urinary pathogens is considered clinically important if obtained by suprapubic aspiration. In practice, three age ranges are usually considered on the basis of differential …