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Commentary
H5N8
Wigeons In Netherlands = Independent Introductions
Recombinomics Commentary
December 4, 2014 17:15
As noted by recent comments, the sequences are closely related to the November sequences in Europe (A/turkey/Germany-MV/R2472/2014, A/duck/England/36254/14, A/chicken/Netherlands/14015526/2014 and A/chicken/Netherlands/14015531/2014) and wild birds in Japan (A/duck/Chiba/26-372-48/2014 and A/duck/Chiba/26-372-61/2014). Although the wigeon sequences are closely related to the public sequences, they have unique markers indicating they are not linked to the above markers and represent an independent introduction.
Public sequences support independent introductions into each of the European countries, and at least 3 introductions into the Netherlands, firmly supporting wild bird sources.
Similarly, the H5N8 sequence data from Europe or wild birds in Japan suggests that the two outbreaks in Fraser Valley are also due to H5N8 from wild birds. Like the Netherlands outbreaks, the outbreaks were in unlinked farms and produce a high mortality in chickens and turkeys.
The delay in announcing the N8 in Canada or the sequence similarities with Fujian H5N8 also supports a serious spreading outbreak in Canda, which will have implications throughout the Americas.
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