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Commensal Escherichia coli are a reservoir for the transfer of XDR plasmids into epidemic fluoroquinolone-resistant Shigella sonnei.
Thanh Duy, Pham; Thi Nguyen, To Nguyen; Vu Thuy, Duong; Chung The, Hao; Alcock, Felicity; Boinett, Christine; Dan Thanh, Ho Ngoc; Thanh Tuyen, Ha; Thwaites, Guy E; Rabaa, Maia A; Baker, Stephen.
Affiliation
  • Thanh Duy P; The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Thi Nguyen TN; The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Vu Thuy D; The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Chung The H; The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Alcock F; The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Boinett C; The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Dan Thanh HN; The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Thanh Tuyen H; The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Thwaites GE; The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Rabaa MA; Centre for Tropical Medicine, Oxford University, Oxford, UK.
  • Baker S; The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
Nat Microbiol ; 5(2): 256-264, 2020 02.
Article in En | MEDLINE | ID: mdl-31959970
Despite the sporadic detection of fluoroquinolone-resistant Shigella in Asia in the early 2000s and the subsequent global spread of ciprofloxacin-resistant (cipR) Shigella sonnei from 2010, fluoroquinolones remain the recommended therapy for shigellosis1-7. The potential for cipR S. sonnei to develop resistance to alternative second-line drugs may further limit future treatment options8. Here, we aim to understand the evolution of novel antimicrobial resistant (AMR) S. sonnei variants after introduction into Vietnam. We found that cipR S. sonnei displaced the resident ciprofloxacin-susceptible (cipS) lineage while rapidly acquiring additional resistance to multiple alternative antimicrobial classes. We identified several independent acquisitions of extensively drug-resistant/multidrug-resistant-inducing plasmids, probably facilitated by horizontal transfer from commensals in the human gut. By characterizing commensal Escherichia coli from Shigella-infected and healthy children, we identified an extensive array of AMR genes and plasmids, including an identical multidrug-resistant plasmid isolated from both S. sonnei and E. coli in the gut of a single child. We additionally found that antimicrobial usage may impact plasmid transfer between commensal E. coli and S. sonnei. These results suggest that, in a setting with high antimicrobial use and a high prevalence of AMR commensals, cipR S. sonnei may be propelled towards pan-resistance by adherence to outdated international treatment guidelines.
Subject(s)

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Shigella sonnei / R Factors / Fluoroquinolones / Drug Resistance, Multiple, Bacterial / Escherichia coli Type of study: Guideline / Observational_studies / Prognostic_studies / Risk_factors_studies Limits: Child / Humans Country/Region as subject: Asia Language: En Journal: Nat Microbiol Year: 2020 Document type: Article Affiliation country: Vietnam Country of publication: United kingdom

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Shigella sonnei / R Factors / Fluoroquinolones / Drug Resistance, Multiple, Bacterial / Escherichia coli Type of study: Guideline / Observational_studies / Prognostic_studies / Risk_factors_studies Limits: Child / Humans Country/Region as subject: Asia Language: En Journal: Nat Microbiol Year: 2020 Document type: Article Affiliation country: Vietnam Country of publication: United kingdom