(A) Phylogenetic relationships among ROP18 sequences from several strains of T. gondii as reported in GenBank, and sequences found in cats in Armenia in present study are shown with numbers (6_3_3; 5_1_6; 3_1_6; 3_1_8; 4_3_2; 4_1_8) and in red font. The phylogeny was inferred by Bayesian analysis in BEAST. Branch lengths indicate genetic distance, and posterior probabilities of nodes are represented by the size of the branches that separate from the node. Major clades labeled are supported by absolute support (PP < 0.99). (B) Neighbor-net phylogenetic network based on the rhoptry protein 18 gene from T. gondii strains. Potential reticulation between strains is denoted by the network patterns connecting strains.