Detection of Cell Mediated Immune Response in Chickens Immunized with Eimeria tenella Sporozoites

The Indian poultry sector has become a major contributor to the national economy as a result of the revolutionary and scientific approaches in avian health care management. Indian poultry industry contributes nearly Rs. 9.9 billion annually to the national economy (Mohana Subramanian et al., 2010). In India, broiler chicks are reared in deep litter system under farm condition which leads to frequent occurrence of the disease and face maximum economic loss due to reduced body weight gain, followed by increased feed conversion ratio (23.74%) and chemoprophylaxis (2.83%) due to coccidiosis (Bera et al., 2010), and the annual losses due to coccidiosis burden was estimated to be more than $ 800 million worldwide (Kitandu and Juranova, 2006). Coccidiosis has long been known as important in poultry, and even today, control requires significant financial expenditure (Chapman, 2003).