2019 Volume 28 Issue 3 Pages 100-104
A 12-year-old dog with anorexia, lethargy, fever, and cough was referred to our hospital. Blood tests revealed a low platelet count and high levels of C-reactive protein (CRP). The detection of Anaplasma phagocytophilum (A. phagocytophilum) DNA in the blood, the positive result for antibodies to A. phagocytophilum, and the presence of morulae within granulocytes in the peripheral blood confirmed the diagnosis of canine granulocytic anaplasmosis. Phylogenetic analysis of gltA and groEL gene revealed that the strain detected in this study and A. phagocytophilum previously reported in Japan were closely related. However this is the first report of canine granulocytic anaplasmosis in western Japan. A. phagocytophilum infection may also occur in non-epidemic regions of Japan.