Concurrent infection with Theileria buffeli caused depression of parasitaemia in Babesia bovis and Anaplasma centrale infections in splenectomised calves but not in B bigemina infections.

In five experiments undertaken in splenectomised calves it was found that Theileria buffeli infections depressed the parasitaemias of superimposed Babesia bovis and Anaplasma centrale infections, but not B bigemina infections. The course of A centrale infections did not appear to be affected by a concurrent Eperythrozoon teganodes infection.