Fig. 3From: Sequencing of emerging canine distemper virus strain reveals new distinct genetic lineage in the United States associated with disease in wildlife and domestic canine populationsPhylogenetic tree for H gene. H gene tree also displays this new strain of CDV as a separate clade (blue) from previously identified genotypes, including the America 2 genotype (red clade). Based on H gene sequence analysis, there are at least three separate “American” clades of CDV currently circulating in the U.SBack to article page