Abstract:
: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use and a high prevalence of AMR commensals, cipR S. sonnei may be propelled towards pan-resistance by adherence to outdated international treatment guidelines.
journal_name
Nat Microbioljournal_title
Nature microbiologyauthors
Thanh Duy P,Thi Nguyen TN,Vu Thuy D,Chung The H,Alcock F,Boinett C,Dan Thanh HN,Thanh Tuyen H,Thwaites GE,Rabaa MA,Baker Sdoi
10.1038/s41564-019-0645-9subject
Has Abstractpub_date
2020-02-01 00:00:00pages
256-264issue
2issn
2058-5276pii
10.1038/s41564-019-0645-9journal_volume
5pub_type
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