The concurrent infection of tick borne haemoprotozoan diseases like B.canis, E.canis and H.canis were commonly recorded in breed dogs. There is paucity in recording the combined haemoprotozoan infection with neoplasms in the native breeds of Tamil Nadu. The current investigation was documented to study the clinico-pathological changes, diagnosis and treatment of the concomitant infection of Hepatozoon canis and Babesia canis along with transmissible venereal tumor in a native dog.Methods: This

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... linical investigation was carried out during April' 2019 for about a month. A male Chippiparai dog was presented to the Veterinary Clinical Complex, VCRI, Tirunelveli with history of mass and bleeding from the genital area. The impression cytology from the mass and the whole blood and serum samples were collected for the laboratory diagnosis.Result: The hematological examination showed marked anaemia and the blood smear revealed the presence of H.canis gamonts in neutrophils and B.canis piroplasm in red bloods cells. The serum biochemical values showed the elevation of alanine aminotransferase, alkaline phosphatase, blood urea nitrogen, creatinine and reduction of total protein, albumin. The impression cytology revealed the presence of uniform sheets discrete round cells with punctuate vacuolation in the cytoplasm, confirmed the sexually transmitted venereal tumor.