Analyse phylogénétique de #H7N9
Par des chercheurs chinois (18), publication du Lancet du 1/05/13 (accès gratuit)
Origin and diversity of novel avian influenza A H7N9 viruses causing human infection : phylogenetic, structural, and coalescent analyses : The Lancet
▻http://www.thelancet.com/journals/lancet/article/PIIS0140-6736(13)60938-1/fulltext
The phylogeny of the H7 gene sequences available showed three main independent lineages—ie, American, Oceanian, and Eurasian lineages. The novel H7N9 virus fell within the Eurasian lineage, and was genetically close to sequences isolated from ducks in Zhejiang Province in 2011 (Figure 1, Figure 2). The H7 phylogenetic tree also showed that varied H7 viruses were circulating in wild ducks along the east Asian flyway, which covers eastern China, South Korea, and Japan. Genetic exchange between wild birds and ducks has also been recorded (figure 2). The estimated time to most recent common ancestor of the novel H7N9 strains was roughly January, 2012 (mean Jan 4, 2012, 95% highest posterior density March 5, 2011—Oct 12, 2012).
Compte-rendu en français ici
Actualité > Virus de la grippe A(H7N9) : il a fallu au moins quatre modifications
▻http://www.futura-sciences.com/fr/news/t/medecine/d/virus-de-la-grippe-ah7n9-il-a-fallu-au-moins-quatre-modifications_4
Que l’on peut résumer par cet intertitre très condensé…
Deux canards et deux poulets, les ingrédients pour H7N9
ou sur Slate
▻http://www.slate.fr/life/71939/h7n9-h5n1
