The present study was conducted for a period of one year from May 2015 to April 2016. A total of 937 blood samples of cattle were screened for theileriosis. Thin blood smears were prepared, air dried, fixed with methanol and stained with Giemsa stain. The microscopic examination of stained blood smears were performed and presence of intraerythrocytic piroplasms in different shapes like round, oval, signet ring, pear, comma, rod or bacilli indicating the incidence of theileriosis in cattle in and around Patna. | Epidemiological aspects of theileriosis in cattle in and around Patna, Bihar, India