1. Introduction

One of the frequent causes of hospitalization among infants (3-4%) is urinary tract infection (UTI). It is characteristic that urinary anomalies are very often (15-20%) responsible for the occurrence of UTI. Early infection diagnostics may result in recognition of suitable treatment for or surgical correction of such anomalies. This is essential in preventing consequential conditions, auch as renal failure.

2. Aim

The aim of our study was to evaluate:

1. The frequency of UTI in newborns and infants with identified urinary anomalies.

2. The occurrence of UTI in female and male cases.

3. Materials and methods

Retrospective analysis was carried out on the medical documentation of 184 patients aged up to 1 year (105 male, 79 female) with identified or suspected urinary anomalies. The patients were hospitalized in the Department of Newborn Pathology and in the Department of Paediatric Diabetology and Congenital Defects of the Medical University of Warsaw in the years 2000 to 2002.

4. Results:

Diagnosis	No. of patients	%	No. female	No. male	Patients with UTI
					No.	%	% F	% M
1. Identified urinary anomalies:	62	33.7	28	34	25	40.3	35.7	44.1
1. Vesicoureteral reflux	45	24.4	22	23	16	35.5	27.3	43.5
1. Hydronephrosis	9	4.9	4	5	4	44.4	50.0	60.0
2. Suspected urinary anomalies:	122	66.3	51	71	66	54.1	64.7	46.5
1. Anomalies excluded	74	40.2	36	38	37	50.0	61.1	39.5
1. Diagnosis not completed	48	26.1	15	33	29	60.4	73.3	54.5
Total	184	100	79	105	91	49.4	54.4	45.7