Fig. 4.

Phylogenetic analysis of VP7 gene nucleotide sequences of the human rotavirus group A strains from the outbreak. A neighbour-joining phylogenetic tree was constructed using MEGA to represent phylogenetic relationships in 23 rotavirus strains. Eight G2 and two G3 strains from the outbreak and 13 reference strains, the sequences of which were retrieved from the GenBank database, were included in the analysis. The bootstrap confidence levels were obtained for 1000 replicates. Sequence nomenclature shows the GenBank accession number, followed by strain designation, G type and country of origin. Rotavirus strains of this study are indicated by the prefix GR followed by sample ID.