Figure 2: Phylogenetic analysis of astrovirus detected in the outbreak, based on 449bp of the capsid region (ORF2) sequences. The phylogenetic tree was generated using the neighbor-joining method with distance calculation by Kimura-2-parameter correction implemented in the MEGA6 software. The numbers in the branches indicate the bootstrap of 1000 replicated values. HAstV: Human astrovirus. Reference strains of HAstV were registered in GenBank under the accession number indicated in the text. Outbreak samples are marked with a triangle.