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Comparative genomics and molecular epidemiology of colistin-resistant Acinetobacter baumannii
This study aimed to investigate the prevalence and resistance mechanisms of colistin-resistant Acinetobacter baumannii (ColRAB) isolates in Serbia, assess their genetic relatedness to other circulating A. baumannii isolates in the neighbouring European countries, and analyse the global genomic epide...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Research Network of Computational and Structural Biotechnology
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9816908/ https://www.ncbi.nlm.nih.gov/pubmed/36659926 http://dx.doi.org/10.1016/j.csbj.2022.12.045 |
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author | Kabic, Jovana Novovic, Katarina Kekic, Dusan Trudic, Anika Opavski, Natasa Dimkic, Ivica Jovcic, Branko Gajic, Ina |
author_facet | Kabic, Jovana Novovic, Katarina Kekic, Dusan Trudic, Anika Opavski, Natasa Dimkic, Ivica Jovcic, Branko Gajic, Ina |
author_sort | Kabic, Jovana |
collection | PubMed |
description | This study aimed to investigate the prevalence and resistance mechanisms of colistin-resistant Acinetobacter baumannii (ColRAB) isolates in Serbia, assess their genetic relatedness to other circulating A. baumannii isolates in the neighbouring European countries, and analyse the global genomic epidemiology of ColRAB isolates. A total of 784 isolates of A. baumannii were recovered from hospitalised patients in Serbia between 2018 and 2021. The antimicrobial susceptibility testing was performed using disk diffusion and broth microdilution. All ColRAB isolates were subjected to DNA isolation and whole-genome sequencing (WGS). Overall, 3.94 % (n = 30) isolates were confirmed as ColRAB. Results of mutational and transcriptional analysis of genes associated with colistin resistance indicate the central role of the two-component regulating system, PmrAB, and increased expression of the pmrC gene in ColRAB. Most of the isolates (n = 29, 96.6 %) belonged to international clone II, with the most common sequence type being ST(Pas)2 (n = 23, 76.6 %). Based on the WGS analysis, ColRAB isolates belonging to the same ST isolated in various countries were grouped into the same clusters, indicating the global dissemination of several high-risk clonal lineages. Phylogenomic analysis of ColRAB isolates, together with all previously published A. baumannii genomes from South-Eastern European countries, showed that colistin resistance arose independently in several clonal lineages. Comparative genomic analysis revealed multiple genes with various roles (transcriptional regulation, transmembrane transport, outer membrane assembly, etc.), which might be associated with colistin resistance in A. baumannii. The obtained findings serve as the basis for further studies, contributing to a better understanding of colistin resistance mechanisms in A. baumannii. |
format | Online Article Text |
id | pubmed-9816908 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Research Network of Computational and Structural Biotechnology |
record_format | MEDLINE/PubMed |
spelling | pubmed-98169082023-01-18 Comparative genomics and molecular epidemiology of colistin-resistant Acinetobacter baumannii Kabic, Jovana Novovic, Katarina Kekic, Dusan Trudic, Anika Opavski, Natasa Dimkic, Ivica Jovcic, Branko Gajic, Ina Comput Struct Biotechnol J Research Article This study aimed to investigate the prevalence and resistance mechanisms of colistin-resistant Acinetobacter baumannii (ColRAB) isolates in Serbia, assess their genetic relatedness to other circulating A. baumannii isolates in the neighbouring European countries, and analyse the global genomic epidemiology of ColRAB isolates. A total of 784 isolates of A. baumannii were recovered from hospitalised patients in Serbia between 2018 and 2021. The antimicrobial susceptibility testing was performed using disk diffusion and broth microdilution. All ColRAB isolates were subjected to DNA isolation and whole-genome sequencing (WGS). Overall, 3.94 % (n = 30) isolates were confirmed as ColRAB. Results of mutational and transcriptional analysis of genes associated with colistin resistance indicate the central role of the two-component regulating system, PmrAB, and increased expression of the pmrC gene in ColRAB. Most of the isolates (n = 29, 96.6 %) belonged to international clone II, with the most common sequence type being ST(Pas)2 (n = 23, 76.6 %). Based on the WGS analysis, ColRAB isolates belonging to the same ST isolated in various countries were grouped into the same clusters, indicating the global dissemination of several high-risk clonal lineages. Phylogenomic analysis of ColRAB isolates, together with all previously published A. baumannii genomes from South-Eastern European countries, showed that colistin resistance arose independently in several clonal lineages. Comparative genomic analysis revealed multiple genes with various roles (transcriptional regulation, transmembrane transport, outer membrane assembly, etc.), which might be associated with colistin resistance in A. baumannii. The obtained findings serve as the basis for further studies, contributing to a better understanding of colistin resistance mechanisms in A. baumannii. Research Network of Computational and Structural Biotechnology 2022-12-28 /pmc/articles/PMC9816908/ /pubmed/36659926 http://dx.doi.org/10.1016/j.csbj.2022.12.045 Text en © 2022 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Research Article Kabic, Jovana Novovic, Katarina Kekic, Dusan Trudic, Anika Opavski, Natasa Dimkic, Ivica Jovcic, Branko Gajic, Ina Comparative genomics and molecular epidemiology of colistin-resistant Acinetobacter baumannii |
title | Comparative genomics and molecular epidemiology of colistin-resistant Acinetobacter baumannii |
title_full | Comparative genomics and molecular epidemiology of colistin-resistant Acinetobacter baumannii |
title_fullStr | Comparative genomics and molecular epidemiology of colistin-resistant Acinetobacter baumannii |
title_full_unstemmed | Comparative genomics and molecular epidemiology of colistin-resistant Acinetobacter baumannii |
title_short | Comparative genomics and molecular epidemiology of colistin-resistant Acinetobacter baumannii |
title_sort | comparative genomics and molecular epidemiology of colistin-resistant acinetobacter baumannii |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9816908/ https://www.ncbi.nlm.nih.gov/pubmed/36659926 http://dx.doi.org/10.1016/j.csbj.2022.12.045 |
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