Fig. 4

Phylogenetic trees of the nucleotide sequences of the PB2 (a), PB1 (b), PA (c), NP (d), M (e), and NS (f) gene segments. Maximum likelihood calculations were done with the IQTree software (Nguyen et al. 2015) under the best fit model according to the Bayesian criterion. Egyptian H6N2 virus is coloured red and indicated with a black dot