| Autor: |
Feng YC; Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung 813414, Taiwan., Liou CH; National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Hsinchu 35053, Taiwan., Ng WV; Department of Biotechnology and Laboratory Science in Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan., Chen FJ; National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Hsinchu 35053, Taiwan.; Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan., Hung CH; Institute of Biotechnology and Chemical Engineering, I-Shou University, Kaohsiung 84001, Taiwan., Liu PY; Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung 813414, Taiwan., Liao YC; Institute of Population Health Sciences, National Health Research Institutes, Miaoli 35053, Taiwan., Wu HC; National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Hsinchu 35053, Taiwan., Cheng MF; Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung 813414, Taiwan.; School of Nursing, Fooyin University, Kaohsiung 83102, Taiwan.; School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan. |
| Abstrakt: |
Third-generation cephalosporin-resistant Escherichia coli (CREC), particularly strains producing extended-spectrum β-lactamases (ESBLs), are a global concern. Our study aims to longitudinally assemble the genomic characteristics of CREC isolates from fecal samples from an index patient with recurrent CREC-related urinary tract infections and his family and swabs from his home environment 12 times between 2019 and 2021 to investigate the distribution of antibiotic resistance genes. CREC identified using the VITEK 2 were subjected to nanopore whole-genome sequencing (WGS). The WGS of 27 CREC isolates discovered in 137 specimens (1 urine, 123 feces, and 13 environmental) revealed the predominance of ST101 and ST131. Among these sequence types, bla CTX-M (44.4%, n = 12) was the predominant ESBL gene family, with bla CTX-M-14 ( n = 6) being the most common. The remaining 15 (55.6%) isolates harbored bla CMY-2 genes and were clonally diverse. All E. coli isolated from the index patient's initial urine and fecal samples belonged to O25b:H4-B2-ST131 and carried bla CTX-M-14 . The results of sequence analysis indicate plasmid-mediated household transmission of bla CMY-2 or bla CTX-M-55 . A strong genomic similarity was discovered between fecal ESBL-producing E. coli and uropathogenic strains. Furthermore, bla CMY-2 genes were widely distributed among the CREC isolated from family members and their home environment. |
