Abstract
This study will aim to evaluate the level of Babesia bovis and Babesia bigemina,infestation by Rhipicephalus (Boophilus) microplus and gene expression of interferon gamma (IFN-g in beef cattle Canchim (5/8 Charolais + 3/8 Zebu)steers grazing naturally infested by ticks. shall be used 50 cattle belonging to the flock Embrapa cattle Southeast, located in the city of São Carlos-SP, a region …