소아 요로감염에서 Escherichia coli의 빈도와 항생제 감수성에 대한 연구 |
지혜미, 곽재혁, 이준호, 박혜원 |
1포천중문의과대학교 소아과학교실 2포천중문의과대학교 소아과학교실 3포천중문의과대학교 소아과학교실 4포천중문의과대학교 소아과학교실 |
Incidence of Escherichia coli and Its Susceptibility to Antimicrobials in Childhood Urinary Tract Infection |
Hye-Mi Chi, Jae-Hyok Kwahk, Jun-Ho Lee, Hye-Won Park |
1Department of Pediatrics, College of Medicine, Pochon CHA University 2Department of Pediatrics, College of Medicine, Pochon CHA University 3Department of Pediatrics, College of Medicine, Pochon CHA University 4Department of Pediatrics, College of Medicine, Pochon CHA University |
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ABSTRACT |
PURPOSE: Empirical antimicrobial treatment is indicated before bacteriological results are available for young children with febrile UTI to minimize renal scarring. To ensure appropriate therapy, knowledge of the prevalence of causative organisms and their susceptibility patterns to antimicrobials is mandatory. We performed a retrospective analysis investigating the local prevalence and resistance patterns of uropathogens, primarily E. coli, isolated from community-acquired UTIs. METHODS: A total of 103 positive urine cultures from children with febrile UTI collected at Bundang CHA General Hospital from February 2004 to February 2005 were analyzed. Inclusion criteria were fever higher than 37.5 degrees C, significant bacteriuria with single strain growth of at least 105 colony forming units/mL urine, and leukocyturia >5/HPF. RESULTS: E. coli(89.3%) was the leading uropathogen followed by Enterococcus spp.(3.9%) Klebsiella spp.(2.9%), Citrobacter spp.(1.9%) and Enterobacter spp.(1.9%). E. coli strains revealed a low proportion of antimicrobial susceptibility to ampicillin(AMP; 27.2%) ampicillin-sulbactam(AMS; 34.8%) and trimethoprim-sulfamethoxazole(SXT; 65.2%). Susceptibility patterns to cephalosporins were as follows; cefazolin(1st generation; 91.3%), cefoxitin(2nd; 100%), ceftriaxone(3rd; 97.8%) and cefepime(4th; 97.8%). Three E. coli isolates produced extended-spectrum beta-lactamase(ESBL). CONCLUSION: Empirical treatment with AMP, AMS and SXT, which are commonly used in pediatric clinics, is not recommended for childhood UTI due to high incidence of resistance. The high level of susceptibility to cephalosporins makes these drugs reasonable alternatives. However the emergence of ESBL-producers, even though they are quite few, may have an impact on cephalosporin treatment in the future. |
Key words:
Urinary tract infection | Escherichia coli | Antimicrobial susceptibility |
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