Occurrence of antimicrobial resistance bacteria in the Yodo River basin, Japan and determination of beta-lactamases producing bacteria

Ecotoxicology and Environmental Safety
Naoyuki YamashitaHiroaki Tanaka

Abstract

Antimicrobial resistant bacteria are widespread in aquatic environments. The aim of the present study was to obtain information on the occurrence of bacteria with antimicrobial resistance and their multiple antimicrobial resistance (MAR) patterns in a river basin in Japan. In addition, the occurrence of fecal bacteria producing extended-spectrum beta-lactamases (ESBLs) and metallo-beta-lactamase (MBL) in the aquatic environment was determined. Among the Escherichia coli isolates recovered from river samples upstream, 55% isolates were resistant to at least one antimicrobial and 18% were MAR. Among the E. coli isolates recovered from wastewater treatment plant (WWTP) effluent samples, 74% isolates were resistant to at least one antimicrobial and 46% were MAR. These findings suggest that the presence of WWTP effluent will increase the degree of contamination with MAR in the aquatic environment. Among the ampicillin-resistant isolates recovered from river samples, 21% isolates were judged as ESBL-producing and none (0%) was judged as MBL-producing. Among the ampicillin-resistant isolates recovered from WWTP effluent samples, 21% were judged as ESBL-producing and 1% was judged as MBL-producing. As for the hospital wastewater sample...Continue Reading

Citations

Apr 4, 2019·Microbial Drug Resistance : MDR : Mechanisms, Epidemiology, and Disease·Huiyun ZouLennart E Nilsson
Oct 30, 2020·International Journal of Environmental Research and Public Health·Kristína LépesováLucia Bírošová
Jul 14, 2019·The Science of the Total Environment·Yoshihiro SuzukiSatoshi Ishii
Jun 11, 2021·The Journal of Veterinary Medical Science·Justice Opare OdoiTetsuo Asai

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