An update on my partial RdRp #sarbecovirus tree. This is now the region 15000-16000 with many smaller sequences.
nextstrain.org/community/baba…
Once sample is collected they do a PCR, if positive they sequence the region 15300-15700, if interesting they try to sequence the whole genome
Species: Rhinolophus, 9 Hipposideridae, 2 Human, 2 Civet, 3 Pangolin, 1 Chinese badger, 2 Vesper, 1 Molossidae.

No rhinolophids in America. In other countries rhinolophids were sampled and were negative to CoV or sarbecovirus. Turkey unsampled, there are sarbecoviruses there!
Recently published:

Lebanon, Russia (Sotchi), Croatia, UK.

In the SARS 1&2 clades: the Menglun samples, Thailand,Cambodia, 12 sequences likely from Jinning (where almost all good matches to SARS-CoV come from).

The African lineage was seen only in the great lakes region.
Four clades:
🔹Europe-Africa
🔹SARS2 (Yunnan)
🔹SARS (Yunnan)
🔹HKU3-Rf1 (Hong-Kong,Hubei,Zhejiang,Jilin,Guizhou..)
🔹Unclassified: India, Japan, a small Yunnan lineage.
🔹Outlier: Taiwan, in the Europe-Africa clade (?)
About the spillover potential: overall it is likely low, see all the species sampled in relation to the PREDICT project in a rectangle containing Yunnan and its borders, most (non-Rhinolophus) samples were tested for CoV and didn't contain sarbecoviruses.

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More from @babarlelephant

29 Mar 20
La propagation de l'épidémie en France.

🔹On constate deux importations d'Italie.
🔹La seconde plus tardive en Alsace a bénéficié d'un événement de super-spreading lors de la réunion évangélique.

#phylogenetic #SARSCoV2 #covid19 @nextstrain nextstrain.org/ncov?c=gt-nuc_… Image
Pourquoi j'affirme que le sous-arbre vert est celui de Mulhouse : les dates, les lieux, l'homme de 86 ans à Thise nextstrain.org/ncov?s=France/… macommune.info/coronavirus-10…
Le fait qu'il y a deux gros foyers épidémiques bien identifiés en France : IDF et Alsace.
Read 32 tweets
15 Mar 20
Deux versions (donc deux importations) de SARS-CoV-2 se baladent en Alsace fin février : celle du sud Espagne et celle d'Allemagne-Italie-Suisse-Pays-Bas.
0.05% de différence entre deux donc peu de chance de corréler à une différence de virulence ou contagiosité. @Brevesdepresse
Si on regarde les séquences des pays voisins de la France on couvre une bonne partie de l'arbre. Il y a eu une petite dizaine d'importations épidémiques en Europe et certainement plus que deux d'entre elles circulent en France. nextstrain.org/ncov?c=country…
@InstitutPasteur a enfin publié ses séquences de début mars de Haut de France, Ile de France et Grand Est. Sans surprise elles tombent dans le gros sous-arbre européen. La France a commencé à y créer son sous-arbre et a exporté aux USA et Pays-Bas.

nextstrain.org/ncov?f_country…
Read 14 tweets

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