{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,18]],"date-time":"2026-10-18T02:30:13Z","timestamp":1792290613660,"version":"4.4.0"},"reference-count":47,"publisher":"F1000 Research Ltd","license":[{"start":{"date-parts":[[2024,12,23]],"date-time":"2024-12-23T00:00:00Z","timestamp":1734912000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100010269","name":"Wellcome Trust","doi-asserted-by":"publisher","award":["217303\/Z\/19\/Z"],"award-info":[{"award-number":["217303\/Z\/19\/Z"]}],"id":[{"id":"10.13039\/100010269","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000268","name":"Biotechnology and Biological Sciences Research Council","doi-asserted-by":"publisher","award":["BB\/V011278\/1"],"award-info":[{"award-number":["BB\/V011278\/1"]}],"id":[{"id":"10.13039\/501100000268","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000865","name":"Bill and Melinda Gates Foundation","doi-asserted-by":"publisher","award":["OPP1128444"],"award-info":[{"award-number":["OPP1128444"]}],"id":[{"id":"10.13039\/100000865","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100004440","name":"Wellcome","doi-asserted-by":"publisher","award":["206454"],"award-info":[{"award-number":["206454"]}],"id":[{"id":"10.13039\/100004440","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["gatesopenresearch.org"],"crossmark-restriction":false},"short-container-title":["Gates Open Res"],"abstract":"<ns3:p>\n                    Typhoid fever is a significant public health problem endemic in Southeast Asia and Sub-Saharan Africa. Antimicrobial treatment of typhoid is however threatened by the increasing prevalence of antimicrobial resistant (AMR)\n                    <ns3:italic>S.<\/ns3:italic>\n                    Typhi, especially in the globally successful lineage (4.3.1) which has rapidly spread in East and Southern Africa. AMR elements can be found either on plasmids or in one of the three chromosomal integration sites, and there is variability of this across the lineage. Several previous studies with Malawian isolates indicated a clonal, locally spreading lineage with chromosomally integrated resistance genes. In a recent study however we noted three isolates with predicted resistance genes unusual for the region, and we here present the resolved genomes of these isolates using long- and short-read sequencing. Our work shows that these isolates are potentially imported cases, most closely related to the recently described sub-lineage 4.3.1.EA1, although they encode IncHI1 plasmids with reduced resistance gene repertoire compared to the main IncHI1 plasmids spreading in East Africa. Similar reduced plasmids were reported in a recent large-scale study in five isolates from Tanzania, highlighting the urgency for better coverage of the African continent in genome studies to better understand the dynamics of these potentially co-circulating plasmids.\n                  <\/ns3:p>","DOI":"10.12688\/gatesopenres.16311.1","type":"journal-article","created":{"date-parts":[[2024,12,23]],"date-time":"2024-12-23T05:10:09Z","timestamp":1734930609000},"page":"143","update-policy":"https:\/\/doi.org\/10.12688\/gatesopenres.crossmark-policy","source":"Crossref","is-referenced-by-count":2,"title":["An exploration of unusual antimicrobial resistance phenotypes in Salmonella Typhi from Blantyre, Malawi reveals the ongoing role of IncHI1 plasmids"],"prefix":"10.12688","volume":"8","author":[{"given":"Allan","family":"Zuza","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexander M.","family":"Wailan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Catherine","family":"Anscombe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicholas A.","family":"Feasey","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eva","family":"Heinz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2560","published-online":{"date-parts":[[2024,12,23]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","first-page":"369-381","DOI":"10.1016\/S1473-3099(18)30685-6","article-title":"The global burden of typhoid and paratyphoid fevers: a systematic analysis for the Global Burden of Disease Study 2017.","volume":"19","author":"J Stanaway","year":"2019","journal-title":"Lancet Infect. 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NAF acknowledges support by the Bill & Melinda Gates Foundation (Investment OPP1128444) and the Wellcome Programme (grant 206454). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.","order":0,"name":"grant-information","label":"Grant Information"},{"value":"This is an open access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.","order":0,"name":"copyright-info","label":"Copyright"}]}}