Phylogenetic Analysis of Hemagglutinin and Neuraminidase Genes of Highly Pathogenic Avian Influenza H5N1 Egyptian Strains Isolated from 2006 to 2008 Indicates Heterogeneity with Multiple Distinct Sublineages

Abstract excerpt

The Eurasian-lineage H5N1 highly pathogenic avian influenza (HPAI) virus caused widespread outbreaks in Egypt in 2006 and eventually become enzootic in poultry. Although outbreaks have a seasonal pattern, with most occurring during the cooler winter months, it remains unclear whether this seasonality reflects virus maintenance within Egypt or yearly introductions of the virus into the country. To evaluate the...

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