Theileriosis is the name given to infections caused by several species of Theileria, the most important of which in Africa are Theileria annulata and Theileria parva. Their distributions in the continent are distinct, and follow that of their main field tick vectors. The annulata occurs in North Africa and the Nile River Valley, and the parva in sub-Saharan eastern, central, and southern Africa. This book reviews the work on theileriosis since 1902...