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[First urinary infection in infants aged less than 3 months. Diagnostic and therapeutic aspects from 44 cases].

While studying retrospectively 44 cases in infants less than 3 months with urinary tract infection, clinical, bacteriological and radiological aspects have been analyzed. Clinical symptomatology were chiefly fever and digestive symptoms (anorexia, vomiting) associated with poor weight gain. Among the causative bacteria, E. coli was the most frequent (88%) with ampicillin resistance in 26% of them. Diagnosis difficulties associated with urine collection with a bag, frequently contaminated, have to be emphasized. It is therefore necessary, except in case of emergency to repeat urine collection before treatment. Among 35 infants investigated radiologically, the urinary tract was abnormal in 46% (48% boys and 40% girls). The localization of the abnormality was upper in 16% and lower (reflux) in 43%. Ampicillin alone or associated with an aminoglycoside was the most common treatment (33 cases). Urine sterilization has always been obtained.