Immunization against East Coast fever (Theileria parva infection of cattle) by infection and treatment: chemoprophylaxis with N-pyrrolidinomethyl tetracycline.

Cattle were immunized against East Coast fever by the inoculation of a tick-derived stabilate of Theileria parva infective particles and the intramuscular injection, at daily intervals, of n-pyrrolidinomethyl tetracycline at a dose level of 5 mg/kg. Four doses of the tetracycline, starting on the day of inoculation of the infective stabilate, minimised the ECF reactions in the cattle during immunization. Immunity to homologous T. parva stabilate challenge was demonstrated in 27 out of 27 cattle infected and treated in this manner.