The sudden dominance of blaCTX-M harbouring plasmids in Shigella spp. Circulating in Southern Vietnam.
<h4>Background</h4>Plasmid mediated antimicrobial resistance in the Enterobacteriaceae is a global problem. The rise of CTX-M class extended spectrum beta lactamases (ESBLs) has been well documented in industrialized countries. Vietnam is representative of a typical transitional middle i...
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oai:doaj.org-article:1df0278a8acb4284ab738ce753e216ed2021-12-02T20:24:26ZThe sudden dominance of blaCTX-M harbouring plasmids in Shigella spp. Circulating in Southern Vietnam.1935-27271935-273510.1371/journal.pntd.0000702https://doaj.org/article/1df0278a8acb4284ab738ce753e216ed2010-06-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/20544028/pdf/?tool=EBIhttps://doaj.org/toc/1935-2727https://doaj.org/toc/1935-2735<h4>Background</h4>Plasmid mediated antimicrobial resistance in the Enterobacteriaceae is a global problem. The rise of CTX-M class extended spectrum beta lactamases (ESBLs) has been well documented in industrialized countries. Vietnam is representative of a typical transitional middle income country where the spectrum of infectious diseases combined with the spread of drug resistance is shifting and bringing new healthcare challenges.<h4>Methodology</h4>We collected hospital admission data from the pediatric population attending the hospital for tropical diseases in Ho Chi Minh City with Shigella infections. Organisms were cultured from all enrolled patients and subjected to antimicrobial susceptibility testing. Those that were ESBL positive were subjected to further investigation. These investigations included PCR amplification for common ESBL genes, plasmid investigation, conjugation, microarray hybridization and DNA sequencing of a bla(CTX-M) encoding plasmid.<h4>Principal findings</h4>We show that two different bla(CTX-M) genes are circulating in this bacterial population in this location. Sequence of one of the ESBL plasmids shows that rather than the gene being integrated into a preexisting MDR plasmid, the bla(CTX-M) gene is located on relatively simple conjugative plasmid. The sequenced plasmid (pEG356) carried the bla(CTX-M-24) gene on an ISEcp1 element and demonstrated considerable sequence homology with other IncFI plasmids.<h4>Significance</h4>The rapid dissemination, spread of antimicrobial resistance and changing population of Shigella spp. concurrent with economic growth are pertinent to many other countries undergoing similar development. Third generation cephalosporins are commonly used empiric antibiotics in Ho Chi Minh City. We recommend that these agents should not be considered for therapy of dysentery in this setting.Nhu Thi Khanh NguyenVinh HaNga Vu Thieu TranRichard StablerDuy Thanh PhamThi Minh Vien LeH Rogier van DoornAna Cerdeño-TárragaNicholas ThomsonJames CampbellVan Minh Hoang NguyenThi Thu Nga TranMinh Van PhamThuy Thu CaoBrendan WrenJeremy FarrarStephen BakerPublic Library of Science (PLoS)articleArctic medicine. Tropical medicineRC955-962Public aspects of medicineRA1-1270ENPLoS Neglected Tropical Diseases, Vol 4, Iss 6, p e702 (2010) |
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Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
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Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 Nhu Thi Khanh Nguyen Vinh Ha Nga Vu Thieu Tran Richard Stabler Duy Thanh Pham Thi Minh Vien Le H Rogier van Doorn Ana Cerdeño-Tárraga Nicholas Thomson James Campbell Van Minh Hoang Nguyen Thi Thu Nga Tran Minh Van Pham Thuy Thu Cao Brendan Wren Jeremy Farrar Stephen Baker The sudden dominance of blaCTX-M harbouring plasmids in Shigella spp. Circulating in Southern Vietnam. |
description |
<h4>Background</h4>Plasmid mediated antimicrobial resistance in the Enterobacteriaceae is a global problem. The rise of CTX-M class extended spectrum beta lactamases (ESBLs) has been well documented in industrialized countries. Vietnam is representative of a typical transitional middle income country where the spectrum of infectious diseases combined with the spread of drug resistance is shifting and bringing new healthcare challenges.<h4>Methodology</h4>We collected hospital admission data from the pediatric population attending the hospital for tropical diseases in Ho Chi Minh City with Shigella infections. Organisms were cultured from all enrolled patients and subjected to antimicrobial susceptibility testing. Those that were ESBL positive were subjected to further investigation. These investigations included PCR amplification for common ESBL genes, plasmid investigation, conjugation, microarray hybridization and DNA sequencing of a bla(CTX-M) encoding plasmid.<h4>Principal findings</h4>We show that two different bla(CTX-M) genes are circulating in this bacterial population in this location. Sequence of one of the ESBL plasmids shows that rather than the gene being integrated into a preexisting MDR plasmid, the bla(CTX-M) gene is located on relatively simple conjugative plasmid. The sequenced plasmid (pEG356) carried the bla(CTX-M-24) gene on an ISEcp1 element and demonstrated considerable sequence homology with other IncFI plasmids.<h4>Significance</h4>The rapid dissemination, spread of antimicrobial resistance and changing population of Shigella spp. concurrent with economic growth are pertinent to many other countries undergoing similar development. Third generation cephalosporins are commonly used empiric antibiotics in Ho Chi Minh City. We recommend that these agents should not be considered for therapy of dysentery in this setting. |
format |
article |
author |
Nhu Thi Khanh Nguyen Vinh Ha Nga Vu Thieu Tran Richard Stabler Duy Thanh Pham Thi Minh Vien Le H Rogier van Doorn Ana Cerdeño-Tárraga Nicholas Thomson James Campbell Van Minh Hoang Nguyen Thi Thu Nga Tran Minh Van Pham Thuy Thu Cao Brendan Wren Jeremy Farrar Stephen Baker |
author_facet |
Nhu Thi Khanh Nguyen Vinh Ha Nga Vu Thieu Tran Richard Stabler Duy Thanh Pham Thi Minh Vien Le H Rogier van Doorn Ana Cerdeño-Tárraga Nicholas Thomson James Campbell Van Minh Hoang Nguyen Thi Thu Nga Tran Minh Van Pham Thuy Thu Cao Brendan Wren Jeremy Farrar Stephen Baker |
author_sort |
Nhu Thi Khanh Nguyen |
title |
The sudden dominance of blaCTX-M harbouring plasmids in Shigella spp. Circulating in Southern Vietnam. |
title_short |
The sudden dominance of blaCTX-M harbouring plasmids in Shigella spp. Circulating in Southern Vietnam. |
title_full |
The sudden dominance of blaCTX-M harbouring plasmids in Shigella spp. Circulating in Southern Vietnam. |
title_fullStr |
The sudden dominance of blaCTX-M harbouring plasmids in Shigella spp. Circulating in Southern Vietnam. |
title_full_unstemmed |
The sudden dominance of blaCTX-M harbouring plasmids in Shigella spp. Circulating in Southern Vietnam. |
title_sort |
sudden dominance of blactx-m harbouring plasmids in shigella spp. circulating in southern vietnam. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2010 |
url |
https://doaj.org/article/1df0278a8acb4284ab738ce753e216ed |
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