Bovine theileriosis (Tie-lir-ee-OH-suhs) is a tick-borne disease caused by a protozoan blood parasite, Theileriosis orientalis. (Malaria is another disease caused by a protozoan blood parasite, but it is mosquito-borne.) It is often referred to as bovine anemia due to the chronic anemia that it can cause in cattle, and it affects many different species of cattle, buffalo and small ruminants …
