Abstract:Canine blood filariasis is an important parasitic disease of canine which is caused by the parasite of dog filariasis in the right ventricle or pulmonary, the main features are circulatory disorders, dyspnea and anemia. The dog blood filaria is also called the dog heart filaria or the dog evil filaria, the dog is the final host, mosquitoes, fleas and other bloodsucking insects are intermediate hosts. When the parasite affects visceral function (such as tricuspid or pulmonary valve insufficiency), the affected dogs will have more serious clinical symptoms such as dyspnea, hydrothorax and abdomen, and edema of the lower body, acute death even occurred. The diagnosis of this disease is mainly due to the detection of microfilariae from the larvae of the dog blood filaria in peripheral blood. The treatment of this disease is based on deworming, symptomatic treatment such as blood replenishment and transfusion as auxiliary measures.