Objective: Urinary tract infection in newborn may be the first sign of an underlying urinary system problems. If not treated on time, the risk of renal scarring and renal failure increases with advancing age. In this study, it was aimed to review the clinical and laboratory findings, causative microorganisms, urinary system anomalies and the efficacy of antibiotic treatments in newborn diagnosed with UTI.

Material and Method: This study was conducted between 01.09.2017 and 01.09.2018 in the Neonatal Intensive Care Unit of Gaziantep Cengiz Gökçek Children’s Hospital. Term and late preterm newborn those bacteria were detected in the urine culture taken by bladder catheterization were included in the study. Clinical, laboratory and radiological imaging results of the cases were evaluated retrospectively.

Results: Of these cases, 45.9% (n :28) were term and 52.5% (n :32) were late preterm babies. It was determined that the presence of maternal UTI during pregnancy was a risk factor for late preterm infants (p <0.001). The most common presenting symptom was jaundice (n :45, 75%) in both groups. The most frequently isolated microorganisms were Escherichia coli (40%) and Klebsiella pneumonia (35%). It was observed that the causative microorganisms were resistant to ampicillin as the most (n :32, 53.3%) and to meropenem as the least (n :7, 11.7%).

Conclusion: History of UTI in the mother during pregnancy, late preterm baby and having urinary system anomaly are important risk factors for UTI in the newborn. Therefore, the patients in the risk group should be followed up at regular intervals for the development of renal scarring.