Backgraund & Objectives: Asymptomatic urinary tract infection (AUTI) is common in childhood and will lead to renal scars. Since the prevalence of AUTI has not been studied in Ardabil, this study set out to determine the prevalence of AUTI among primary-school children of Ardabil.

 Methods: In this descriptive-analytical study, 470 cases were selected randomly from 40,000 primary school students. The data were collected with completing a questionnaire. The cases with symptomatic urinary infection and those with discontented parents were omitted. Midstream urine was collected and sent to laboratory for analysis and culture. Colony count ≥ 100,000 CFU / ml and higher was considered as UTI and the prevalence of this complication in the samples was studied.

 Results: Of 470 subjects, 16 ones were ruled out due to urinary symptoms or parents’ discontent, and the study continued with 454 students (238 girls and 216 boys). 19 students (4.2%) had positive culture (13 girls and 6 boys). Prevalence of AUTI was 5.5% in girls and 2.8% in boys. In this study only seven cases (36.8%) had pyuria ( WBC>5).

 Conclusion: The high prevalence of AUTI specially in girls is important. Regarding the known complications of AUTI, other researches seem to be necessary to determine the causes as well as ways to prevent and treat it.

  Background & Objectives: Urinary tract infections (UTI) are among the most common bacterial infections in humans. One of the most frequent form of UTI is asymptomatic bacteriuria. The aim of this study is to determine the prevalence of asymptomatic bacteriuria in female students of Babol Islamic Azad University.

  Methods: This research was carried out on 207 female students from Babol Islamic Azad University in 2002. The age ranges of the students were between 18-29 years. Mid-stream urine (MSU) was collected from students. Urinalysis and bacteriological identification culture of MSU were done twice on all specimens. The prevalence of asymptomatic bacteriuria was determined by dividing the total number of observed bacteriuria by the total number of samples.

  Results: Bacteriological tests of MSU revealed that 19 (9.2%) cases were positive for asymptomatic bacteriuria. The microbe most frequently causing asymptomatic bacteriuria was staphylococcus saprophyticus in 7 (36.8%) cases Escherichia coli in 6 (31.6%) cases and Klebsiella in 3 (15.8%) cases.

  Conclusion: Asymptomatic bacteriuria was highly prevalent in our study. Therefore, young women must consider general health rules about genitourinary system to avoid asymptomatic bacteriuria.