Phylogenetic tree based on the N-J analysis of gp60 sequences of C. meleagridis. Phylogenetic relationships of C. meleagridis subtypes identified in chicken here and parts of other known subtypes deposited in GenBank were inferred by a neighbor-joining analysis of gp60 sequences of C. meleagridis based on genetic distances by the Kimura two-parameter model. The numbers on the branches are percent bootstrapping values from 1000 replicates. The triangles filled in black and white indicate novel and known subtypes identified in this study, respectively.