ABSTRACT
Nowadays E. coli as the most common Cause of acute urinary tract infection are generally named based on serotypes of O and H. The aim of this Cross-Sectional study was to determine the prevalence of H serogroups of E. coli strains that cause community acquired UTI in children. In this study 96 children with urinary tract infections [UTI] referred to two teaching hospitals, in Jahrom, Iran during the period of August 2005- August 2006 were enrolled. Antibiogram was done by disk diffusion method and serotyping by tebe agglutination methods. A Total of 96 E. coli strains were isolated from the urine samples of children with UTI aged from one month to 14 years. Cystitis was diagnosed in 49.2% and pyelonephritis ill 50.8% of these patients. The most resistance was related to Ampicilin [80.2%] and the least to imipenem [1.1%]. The most common type of H antigen was H4 [6.1%]. This is the first report of E-coli serotying in children with UTI from the south of Iran and its relationship with antibiotic resistance and clinical presentation. Further research in athes p ts with move st e thypes is re Commended