Whole-genome analysis of carbapenem-resistant Acinetobacter baumannii from clinical isolates in Southern Thailand
2
Issued Date
2022-01-01
Resource Type
eISSN
20010370
Scopus ID
2-s2.0-85122946452
Journal Title
Computational and Structural Biotechnology Journal
Volume
20
Start Page
545
End Page
558
Rights Holder(s)
SCOPUS
Bibliographic Citation
Computational and Structural Biotechnology Journal Vol.20 (2022) , 545-558
Suggested Citation
Chukamnerd A., Singkhamanan K., Chongsuvivatwong V., Palittapongarnpim P., Doi Y., Pomwised R., Sakunrang C., Jeenkeawpiam K., Yingkajorn M., Chusri S., Surachat K. Whole-genome analysis of carbapenem-resistant Acinetobacter baumannii from clinical isolates in Southern Thailand. Computational and Structural Biotechnology Journal Vol.20 (2022) , 545-558. 558. doi:10.1016/j.csbj.2021.12.038 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/84405
Title
Whole-genome analysis of carbapenem-resistant Acinetobacter baumannii from clinical isolates in Southern Thailand
Other Contributor(s)
Abstract
The worldwide spread of carbapenem-resistant Acinetobacter baumannii (CRAB) has become a healthcare challenge for some decades. To understand its molecular epidemiology in Southern Thailand, we conducted whole-genome sequencing (WGS) of 221 CRAB clinical isolates. A comprehensive bioinformatics analysis was performed using several tools to assemble, annotate, and identify sequence types (STs), antimicrobial resistance (AMR) genes, mobile genetic elements (MGEs), and virulence genes. ST2 was the most prevalent ST in the CRAB isolates. For the detection of AMR genes, almost all CRAB isolates carried the blaOXA-23 gene, while certain isolates harbored the blaNDM-1 or blaIMP-14 genes. Also, various AMR genes were observed in these CRAB isolates, particularly aminoglycoside resistance genes (e.g., armA, aph(6)-Id, and aph(3″)-Ib), fosfomycin resistance gene (abaF), and tetracycline resistance genes (tet(B) and tet(39)). For plasmid replicon typing, RepAci1 and RepAci7 were the predominant replicons found in the CRAB isolates. Many genes encoding for virulence factors such as the ompA, adeF, pgaA, lpxA, and bfmR genes were also identified in all CRAB isolates. In conclusion, most CRAB isolates contained a mixture of AMR genes, MGEs, and virulence genes. This study provides significant information about the genetic determinants of CRAB clinical isolates that could assist the development of strategies for improved control and treatment of these infections.