Clinical features of febrile urinary tract infection caused by extended-spectrum beta-lactamase-producing Escherichia coli in children

Takuma Ohnishi, Yoshinori Mishima, Shohei Takizawa, Kentaro Tsutsumi, Atsuko Amemiya, Nao Akiyama, Yukiko Kanna, Shinya Asato, Mizue Tomita, Masako Ikemiyagi, Nobuaki Shikoro, Maki Nakazawa, Nobuyoshi Kurihara, Isamu Kamimaki

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4 Citations (Scopus)


The global prevalence of infections caused by extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli has been increasing. In children, ESBL-producing E. coli manifest mostly as febrile urinary tract infections (fUTIs). This study aimed to elucidate the clinical features of fUTI resulting from ESBL-producing E. coli in Japanese patients. The clinical features of children with E. coli-related fUTI were retrospectively examined. These children underwent treatment at the National Hospital Organization Saitama Hospital, Japan, between May 2010 and April 2018. Urine specimens were obtained by either bladder catheterization or the clean-catch method. All children having positive urine cultures (≥104 colony-forming unit/mL for catheter specimens and ≥105 colony forming unit/mL for clean-catch specimens) and a fever of ≥38°C were considered to have fUTI. During the study period, 171 patients were diagnosed with E. coli-related fUTI. Among these, 17 (9.9%) fUTI cases were caused by ESBL-producing E. coli. A significant difference was noted in the median age of the populations having ESBL-producing E. coli and non-ESBL-producing E. coli infections (2 and 5 months, respectively); other characteristics were not significantly different between the two patient groups. ESBL-producing E. coli infections markedly increased in our hospital between 2013 and 2018. In the present study, young age was the only risk factor for fUTI caused by ESBL-producing E. coli identified in Japanese children. (DOI: 10.2302/kjm.2019-0005-OA; Keio J Med 69 (2): 43–47, June 2020).

Original languageEnglish
Pages (from-to)43-47
Number of pages5
JournalKeio Journal of Medicine
Issue number2
Publication statusPublished - 2020
Externally publishedYes


  • Extended-spectrum beta-lactamase-producing Escherichia coli
  • Febrile urinary tract infection
  • Risk factor

ASJC Scopus subject areas

  • General Medicine


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