Xia Chuai, Yaya Zhou, Junhua Feng, Menghan Yu, Yan Wu, Lujuan Han, Yan Zhao, Hongxiu Qiao, Zhiyun Gao, Jian Li, Lixin Xie, Wenting Zhao, Changle Wang

Analysis of multidrug‐resistant determinants of clinically isolated Acinetobacter baumannii CYZ via whole genome sequencing

  • Virology
  • Immunology
  • Microbiology
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AbstractAcinetobacter baumannii is a multidrug‐resistant coccobacillus responsible for severe nosocomial infectious diseases. This study mainly focuses on investigating the antimicrobial resistance features of a clinically isolated strain (A. baumannii CYZ) using the PacBio Sequel II sequencing platform. The chromosomal size of A. baumannii CYZ is 3,960,760 bp, which contains a total of 3803 genes with a G + C content of 39.06%. Functional analysis performed using the Clusters of Orthologous Groups of Proteins (COGs), Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) databases, as well as the Comprehensive Antibiotic Resistance Database (CARD) revealed a complicated set of antimicrobial resistance determinants in the genome of A. baumannii CYZ, which were mainly classified into multidrug efflux pumps and transport systems, β‐lactamase relative and penicillin‐binding proteins, aminoglycoside modification enzymes, alternation of antibiotic target sites, lipopolysaccharide relative, and other mechanisms. A total of 35 antibiotics were tested for the antimicrobial susceptibility of A. baumannii CYZ, and the organism exhibited a stronger antimicrobial resistance ability. The phylogenetic relationship indicated that A. baumannii CYZ has high homology with A. baumannii ATCC 17978; however, the former also exhibited its specific genome characteristics. Our research results give insight into the genetic antimicrobial‐resistant features of A. baumannii CYZ as well as provide a genetic basis for the further study of the phenotype.

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