Tingting Cao1, Yuanyuan Liu1, Yiming Li1, Yang Wang1, Zhangqi Shen1, Bin Shao1,2, Timothy R Walsh3, Jianzhong Shen1, Shaolin Wang1. 1. Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China. 2. Beijing Center for Disease Control and Prevention, Beijing 10013, China. 3. Department of Medical Microbiology and Infectious Disease, Institute of Infection & Immunity, UHW Main Building, Heath Park Hospital, Cardiff, UK.
Abstract
OBJECTIVES: This study was designed to understand the prevalence of antibiotic-resistant bacteria in the Beijing subway environment and the potential transmission of carbapenem-resistant Enterobacteriaceae in a public transportation environment. METHODS: Carbapenem-resistant isolates were selected on brain heart infusion agar supplemented with meropenem (0.5 mg/L) and antimicrobial susceptibility testing was conducted using the broth microdilution method. WGS analyses were conducted for 11 Klebsiella pneumoniae isolates to identify resistance genes. The genetic relationships among the isolates were evaluated by MLST and PFGE. RESULTS: We identified 11 carbapenem-resistant K. pneumoniae isolates from the Beijing subway environment. WGS revealed three STs among the 11 isolates, with 9 isolates classified as ST726 and containing a blaNDM-5-carrying IncX3 plasmid. The genetic environment of blaNDM-5 was very similar to that observed in other blaNDM-5-containing clinical isolates. CONCLUSIONS: The presence of carbapenem-resistant Enterobacteriaceae in a public transportation environment is concerning and indicates that regular antimicrobial resistance surveillance is urgent and necessary.
OBJECTIVES: This study was designed to understand the prevalence of antibiotic-resistant bacteria in the Beijing subway environment and the potential transmission of carbapenem-resistant Enterobacteriaceae in a public transportation environment. METHODS: Carbapenem-resistant isolates were selected on brain heart infusion agar supplemented with meropenem (0.5 mg/L) and antimicrobial susceptibility testing was conducted using the broth microdilution method. WGS analyses were conducted for 11 Klebsiella pneumoniae isolates to identify resistance genes. The genetic relationships among the isolates were evaluated by MLST and PFGE. RESULTS: We identified 11 carbapenem-resistant K. pneumoniae isolates from the Beijing subway environment. WGS revealed three STs among the 11 isolates, with 9 isolates classified as ST726 and containing a blaNDM-5-carrying IncX3 plasmid. The genetic environment of blaNDM-5 was very similar to that observed in other blaNDM-5-containing clinical isolates. CONCLUSIONS: The presence of carbapenem-resistant Enterobacteriaceae in a public transportation environment is concerning and indicates that regular antimicrobial resistance surveillance is urgent and necessary.
Authors: Dennis Nurjadi; Martin Scherrer; Uwe Frank; Nico T Mutters; Alexandra Heininger; Isabel Späth; Vanessa M Eichel; Jonas Jabs; Katja Probst; Carsten Müller-Tidow; Juliane Brandt; Klaus Heeg; Sébastien Boutin Journal: Microbiol Spectr Date: 2021-11-24