Abstract
An Anaplasma species closely related to Anaplasma phagocytophilum detected in sika deer in Hokkaido, Japan was molecularly analyzed using 16S rRNA, citrate synthase (gltA), and heat-shock operon (groEL) gene sequences. Genome walking was performed to determine its complete gltA and groEL sequences (1233bp and 1650bp, respectively). Percent identities to the closest A. phagocytophilum sequences from the US and European strains were 98.6–98.8%, 76.5%, and 80.3–80.8% for 16S rRNA, gltA, and groEL genes, respectively. For deduced amino acid sequences, percent identities to the closest A. phagocytophilum sequences were 66.7% and 97.6% for gltA and groEL genes, respectively. Phylogenetic analyses revealed divergence from any known A. phagocytophilum strain. The lower identities and the divergent phylogenetic position of the Anaplasma sp. detected from sika deer in Japan with established A. phagocytophilum strains provide evidence of its potential novelty.
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