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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 : Comptes rendus biologies

Contribution of microbial genomics to cholera epidemiology.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Comptes rendus biologies - 11 May 2022

Rouard C, Njamkepo E, Quilici ML, Weill FX

Link to Pubmed [PMID] – 35787619

Link to DOI – 10.5802/crbiol.77

C R Biol 2022 May; 345(1): 37-56

In 2022, the burden of cholera-an acute watery diarrheal disease caused by Vibrio cholerae serogroup O1 (or more rarely O139) bacteria, which produce cholera toxin-remains high in many African and Asian countries. In the last few years, microbial genomics has made it possible to define the bacterial populations responsible for cholera more precisely. It has been shown that the current, seventh pandemic is due to a single lineage with a reservoir in the countries of the Bay of Bengal (India and Bangladesh). There have been several transmissions of the causal agent of cholera from this region to Africa, Asia and Latin America, suggesting a human-to-human transmission of the disease. Microbial genetics can help to fight this scourge by providing insight into cholera epidemiology and through its use in disease monitoring, thereby contributing to the achievement of the World Health Organization’s goal of reducing cholera deaths by 90% by 2030.En 2022, de nombreux pays d’Afrique et d’Asie restent des foyers épidémiques de choléra, maladie diarrhéique causée par la bactérie Vibrio cholerae de sérogroupe O1 (ou plus rarement O139) produisant la toxine cholérique. La génomique microbienne a permis ces dernières années de mieux définir les populations bactériennes responsables du choléra. Il a ainsi été montré qu’il n’existait qu’une seule lignée génétique de Vibrio cholerae O1 responsable de la septième pandémie dont le réservoir se situe dans la région du golfe du Bengale (Inde et Bangladesh). Plusieurs évènements de transmission de l’agent du choléra vers l’Afrique, l’Europe ou l’Amérique latine ont été identifiés et suggèrent une transmission interhumaine de la maladie. Les données issues des travaux de génomique microbienne ainsi que son utilisation pour la surveillance globale du choléra vont permettre de mieux lutter contre ce fléau et participer à l’objectif de l’Organisation mondiale de la Santé de réduire de 90 % les décès dus à cette maladie en 2030.