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© Institut Pasteur/Antoinette Ryter
Salmonella spp. Bactéries à Gram négatif, aérobies ou anaérobies facultatifs à transmission orofécale. Les salmonelles majeures (sérotype typhi et sérotype paratyphi) sont responsables des fièvres typhoïde et paratyphoïde chez l'homme uniquement ; les salmonelles mineures (sérotype typhimurium et sérotype enteritidis) sont impliquées dans 30 à 60 % des gastroentérites et toxiinfections d'origine alimentaire. Image colorisée.
Publication : Nature Genetics

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

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Nature Genetics - 22 Aug 2016

Feasey NA, Hadfield J, Keddy KH, Dallman TJ, Jacobs J, Deng X, Wigley P, Barquist 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

Link to Pubmed [PMID] – 27548315

Nat. Genet. 2016 Aug;

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.

http://www.ncbi.nlm.nih.gov/pubmed/27548315