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Sex and Age Differences of Etiologic Organisms in Urinary Tract Infection.

Journal of the Korean Pediatric Society 1987;30(10):1100-1106.
Published online October 31, 1987.
Sex and Age Differences of Etiologic Organisms in Urinary Tract Infection.
Sun Ho Lee, Seung Jae Yang, Jeh Hoon Shin, Woo Gill Lee
Department of Pediatrics, Hanyang University, College of Medicine, Seoul, Korea
소아 요로감염증 원인균의 성별 및 연령차이
이선호, 양승재, 신재훈, 이우길
한양대학교 의과대학 소아과학교실
There is suggestive evidence that natural history of urinary tract infection (UTI) in male children differs from that of the disease in female children. We have studied sex and age differences of etiologic organism in 257 patients with UTI who were admitted to the Department of Pediatrics Hanyang University Hospital from January 1978 toDecember 1985. All patient had the positive urine culture and a single colony count more than 105/ml regardless of culture 2 more organisms in a patient. The results obtained were as follows; 1. UTI was more prevalent in infant (28.4%) and early childhood (37.7%). Sex differences showed male predominance in the all age group except puberty, but it was found to have trend that incidence of UTI was increased in female and decreased in male with age. 2. The common etiologic organisms of UTI were E. coli (47.4%), Enterococci (13.3%), Staphylococci (10.7%), and Klebsiella (10.4%). 3. E. coli was the most common organism of UTI in both sexes, but it was found to have somewhat difference in prevalence, although there was no statistical significance. The more common organisms next E. coli were Gram positive organism such as Staphylococci and Enterococci (29.1%) in male, and Klebsiella (12.6%) in female. Incidence of UTI by Proteus was low in both sexes (male 4.6% vs female 3.6%). 4. Although E. coli was the most common organism in UTI, prevalence of E. coli and other organisms had age differences, that is, incidence of UTI by E. coli were 50% in infant and early childhood but 34.8% in neonate. The second common organisms were Enterococci in neonate, early childhood and puberty, Klebsiella in infant, and Staphylococci in late childhood.
Key Words: Etiologic organism, Sex and age differences, Urinary tract infection.

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