“…Routine urine analysis and posterior urine culture were performed for all patients who, in the referred period, presented with symptoms that suggested UI (fever, irritability, vomit, dysuria, pollakiuria). UI was defined as the presence of suggestive clinical symptoms, characteristic routine urine analysis and positive urine culture (the following bacterial counts were considered: if suprapubic aspiration, any growth; if bladder catheterization, presence of ≥5 4 of colony forming units/mL; if mid-stream urine collection , presence of ≥10 5 of colony forming units /mL). In 100% of the children, urine culture was carried out up to 36 hours before the examination, which was negative in all cases.…”