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. 2016 Oct;48(10):1211-1217.
doi: 10.1038/ng.3644. Epub 2016 Aug 22.

Distinct Salmonella Enteritidis lineages associated with enterocolitis in high-income settings and invasive disease in low-income settings

Nicholas A Feasey 1 2 3 4 , James Hadfield 2 , Karen H Keddy 5 6 , Timothy J Dallman 7 , Jan Jacobs 8 9 , Xiangyu Deng 10 11 , Paul Wigley 4 , Lars Barquist 12 , Gemma C Langridge 2 , Theresa Feltwell 2 , Simon R Harris 2 , Alison E Mather 2 , Maria Fookes 2 , Martin Aslett 2 , Chisomo Msefula 3 13 , Samuel Kariuki 14 , Calman A Maclennan 2 15 , Robert S Onsare 14 , François-Xavier Weill 16 , Simon Le Hello 16 , Anthony M Smith 5 , Michael McClelland 17 , Prerak Desai 17 , Christopher M Parry 1 18 , John Cheesbrough 19 , Neil French 4 , Josefina Campos 20 , Jose A Chabalgoity 21 , Laura Betancor 21 , Katie L Hopkins 22 , Satheesh Nair 7 , Tom J Humphrey 23 , Octavie Lunguya 24 25 , Tristan A Cogan 26 , Milagritos D Tapia 27 , Samba O Sow 28 , Sharon M Tennant 27 , Kristin Bornstein 27 , Myron M Levine 27 , Lizeth Lacharme-Lora 4 , Dean B Everett 4 , Robert A Kingsley 2 29 , Julian Parkhill 2 , Robert S Heyderman 3 30 , Gordon Dougan 2 , Melita A Gordon # 3 4 , Nicholas R Thomson # 2 18
Affiliations

Distinct Salmonella Enteritidis lineages associated with enterocolitis in high-income settings and invasive disease in low-income settings

Nicholas A Feasey et al. Nat Genet. 2016 Oct.

Erratum in

  • Erratum: Distinct Salmonella Enteritidis lineages associated with enterocolitis in high-income settings and invasive disease in low-income settings.
    Feasey NA, Hadfield J, Keddy KH, Dallman TJ, Jacobs J, Deng X, Wigley P, Barquist L, Langridge GC, Feltwell T, Harris SR, Mather AE, Fookes M, Aslett M, Msefula C, Kariuki S, Maclennan CA, Onsare RS, Weill FX, Le Hello S, Smith AM, McClelland M, Desai P, Parry CM, Cheesbrough J, French N, Campos J, Chabalgoity JA, Betancor L, Hopkins KL, Nair S, Humphrey TJ, Lunguya O, Cogan TA, Tapia MD, Sow SO, Tennant SM, Bornstein K, Levine MM, Lacharme-Lora L, Everett DB, Kingsley RA, Parkhill J, Heyderman RS, Dougan G, Gordon MA, Thomson NR. Feasey NA, et al. Nat Genet. 2017 Mar 30;49(4):651. doi: 10.1038/ng0417-651c. Nat Genet. 2017. PMID: 28358127 No abstract available.

Abstract

An epidemiological paradox surrounds Salmonella enterica serovar Enteritidis. In high-income settings, it has been responsible for an epidemic of poultry-associated, self-limiting enterocolitis, whereas in sub-Saharan Africa it is a major cause of invasive nontyphoidal Salmonella disease, associated with high case fatality. By whole-genome sequence analysis of 675 isolates of S. Enteritidis from 45 countries, we show the existence of a global epidemic clade and two new clades of S. Enteritidis that are geographically restricted to distinct regions of Africa. The African isolates display genomic degradation, a novel prophage repertoire, and an expanded multidrug resistance plasmid. S. Enteritidis is a further example of a Salmonella serotype that displays niche plasticity, with distinct clades that enable it to become a prominent cause of gastroenteritis in association with the industrial production of eggs and of multidrug-resistant, bloodstream-invasive infection in Africa.

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Conflict of interest statement

Competing financial interests: The authors declare no competing financial interests.

Figures

Figure 1
Figure 1
Maximum likelihood phylogeny of S. Enteritidis based on 675 isolates rooted to S. Gallinarum. There are 3 epidemic clades; 2 African epidemic clades and a global epidemic clade. Scale bar indicates nucleotide substitutions per site.
Figure 2
Figure 2
Differences in accessory genomes of 4 major clades. Approximate position of prophages in chromosome is depicted, although prophages are not drawn to scale
Figure 3
Figure 3
Heat map revealing changes in metabolic activity of Central/Eastern African clade isolate D7795 when compared to global epidemic isolate A1636 at 28 and 37°C. The figure also displays whether there are corresponding mutations in genes related to the affected metabolic pathway. (NSSNP=Non-synonymous single nucleotide polymorphism, HDG = Hypothetically disrupted gene)
Figure 4
Figure 4
Salmonella isolation from a chick infection model demonstrates failure of Central/Eastern African clade isolate to invade chicken spleen (4A) and liver (4B) or to colonize chicken caeca (4C) at 7 days post infection (dpi) (n=24 at this time point) compared to the global epidemic clade. Numbers are expressed as colony forming units (CFU) per gram of tissue

Comment in

References

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