For treatment of tick-transmitted theileriosis caused by the intracellular protozoan parasites Theileria parva (East Coast fever, Corridor disease, Zimbabwean theileriosis) and T. annulata (tropical theileriosis) in cattle. It is active against both the schizont and piroplasm stages of Theileria spp. and may be used during the incubation period of the disease, or when clinical signs are apparent.