Theileriosis is a disease of mammals and birds caused by a [[protozoa | '''protozoal''']] pathogen which resides within the [[Lymphocytes - Introduction |lymphocytes]] and [[Macrophages|macrophages]]. | Theileriosis is a disease of mammals and birds caused by a [[protozoa | '''protozoal''']] pathogen which resides within the [[Lymphocytes - Introduction |lymphocytes]] and [[Macrophages|macrophages]]. |