Preliminary observations on the combined use of imidocarb and Babesia blood vaccine in cattle.

Imidocarb was used by three different methods to control reactions in cattle induced by a Babesia blood vaccine produced in South Africa. Simultaneous administration of 0,15 mg/kg imidocarb and Babesia bovis vaccine gave satisfactory control. When the vaccine was given seven days prior to the imidocarb treatment a dose between 0,15 mg/kg and 0,6 mg/kg imidocarb was required for effective control. A combined B. bovis and Babesia bigemina vaccine given at 21 and again 61 days after a 3 mg/kg imidocarb treatment allowed the development of an adequate premunity to both these parasites.