[Urinary tract infection in children].

Urinary tract infection in children. The care of a child suspected of urinary infection (UI) goes through 4 stages. The diagnosis of UI is based on the presence of bacteriuria > 105 / mL, the collection of urine through a bas is unreliable and source of false positives. Localization diagnosis (acute pyelonephritis or cystitis) is based on clinical and biological signs (leukocytosis and inflammation). Etiological diagnosis is based on renal ultrasonography looking for obstructive uropathy, stones and bladder dysfunction; the search for a vesico-ureteral reflux with retrograd cystography is not systematic at first infection. The treatment of acute pyelonephritis is initiated usually intravenously for a period of 3 or 4 days. Oral antibiotics is then possible.