The theileriosis and anaplasmosis are not common in Himalayan region of India. However, this paper reports the outbreak of theileriosis and anaplasmosis in a herd of Holstein cross bred cows maintained at Graphic Era University Dehradun, Uttarakhand, India. This was because of introduction of native Red Sindhi cows. These native cows are in apparent carrier of theileria and anaplasmosis. Even with given treatment for theileria with Butalex (Buparvaquone) 4 positive cows and 4 calves died. One of the cows pregnant for 5 month aborted. That outbreak of theileria in the elite Holstein cross bred herd is reported in Himalayan region of India.
Key words: Theileria, blood protozoon’s, milk production, theileriosis, anaplasmosis.
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