Abstract:
:A highly invasive form of non-typhoidal Salmonella (iNTS) disease has recently been documented in many countries in sub-Saharan Africa. The most common Salmonella enterica serovar causing this disease is Typhimurium (Salmonella Typhimurium). We applied whole-genome sequence-based phylogenetic methods to define the population structure of sub-Saharan African invasive Salmonella Typhimurium isolates and compared these to global Salmonella Typhimurium populations. Notably, the vast majority of sub-Saharan invasive Salmonella Typhimurium isolates fell within two closely related, highly clustered phylogenetic lineages that we estimate emerged independently ∼52 and ∼35 years ago in close temporal association with the current HIV pandemic. Clonal replacement of isolates from lineage I by those from lineage II was potentially influenced by the use of chloramphenicol for the treatment of iNTS disease. Our analysis suggests that iNTS disease is in part an epidemic in sub-Saharan Africa caused by highly related Salmonella Typhimurium lineages that may have occupied new niches associated with a compromised human population and antibiotic treatment.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Okoro CK,Kingsley RA,Connor TR,Harris SR,Parry CM,Al-Mashhadani MN,Kariuki S,Msefula CL,Gordon MA,de Pinna E,Wain J,Heyderman RS,Obaro S,Alonso PL,Mandomando I,MacLennan CA,Tapia MD,Levine MM,Tennant SM,Parkhill J,doi
10.1038/ng.2423subject
Has Abstractpub_date
2012-11-01 00:00:00pages
1215-21issue
11eissn
1061-4036issn
1546-1718pii
ng.2423journal_volume
44pub_type
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