According to the Friedrich Loeffler Institute,
phylogenetic analysis of the Czech isolate for HA1 reveals closest genetic similarity (99.5% at the nucleotide level) to recent viruses isolated from poultry and ‘captive hunting’ falcons in Kuwait in March 2007. These isolates group more widely with contemporary and 2006
strains from Bangladesh, Pakistan, and Azerbaijan,
but they appear to be less related to viruses isolated from both wild birds and poultry
during the outbreaks in EU Member States in 2006 and different from the viruses obtained during outbreaks in Hungary and the UK at the
beginning of 2007. Therefore, the current outbreak in Europe represents a
new introduction of virus into Europe, however the source remains unknown.,
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