Case Report of blaNDM-7-Harboring IncX3 Plasmid in ST196 Klebsiella quasipneumoniae in China

Abstract

Klebsiella quasipneumoniae isolate SBH035 was recovered from a patient in Jiangsu Province, China. The isolate showed resistance to ampicillin, cefazolin, cefotaxime, meropenem, ceftazidime–avibactam, and fosfomycin. The carbapenemase-encoding gene blaNDM-7 was identified, and whole genome sequencing analysis indicated that blaNDM-7 was located in an IncX3 plasmid with a conserved structure of IS26-ΔcutA-tat-trpF-bleMBL-blaNDM-7-ISAba125-IS3000-ΔTn2. To date, this is the first identification of a blaNDM-7-harboring IncX3 plasmid in ST196 K. quasipneumoniae from a patient in China. Greater attention to controlling the dissemination of IncX3 plasmids is needed owing to potential horizontal transfer via mobile genetic elements.