Prevalence of Theileria orientalis in crossbred cattle of Kamrup district of Assam

Abstract

Theileriasis is a tick borne disease of cattle caused by different species of Theileria. The present study was carried out to examine the prevalence of Theileria orientalis among crossbred cattle in relation to season, age and breed in Khanapara locality of Kamrup District of Assam, India. A total of 563 crossbred cattle were screened, out of 563 crossbred cattle 275 (48.84%) cattle were positive for Theileria orientalis. The prevalence of Theileria orientalis were recorded 48.84%. The prevalence rate of Theileria orientalis were highest (53.85%) in the monsoon season followed by pre-monsoon (48.84%), winter (45.74%) and the lowest (42.27%) rate was in post-monsoon season. The highest (54.04%) prevalence was recorded among Holstein Friesian crossbred, followed by Jersey crossbred (50.26%) and the lowest (41.18%) prevalence was recorded among Sahiwal crossbred. The higher (60.19%) prevalence of Theileria orientalis was recorded among aged group of above 3 years old, and lowest (34.54%) prevalence was recorded among age group of up to 3 years old.