Figure 3From: Prevalence of four different subgenotypes of genotype 4 hepatitis E virus among swine in the Shanghai area of ChinaPhylogenetic tree constructed by alignment of consensus sequence of the isolates in each subgroup, using the neighbor- joining method and evaluated using the interior branch test method with Mega 4 software. Percent bootstrap support is indicated at each node. Avian HEV strain is included as outgroup.Back to article page