[Experimental trypanosomiasis caused by Trypanosoma brucei brucei in domestic cattle. Antigenic diversity and trypanotolerance].

The antigenic repertoire expressed in four trypanosensitive Zebu cattle after cyclic infection by a late variant of the repertoire DiTAR 1 was studied using agglutinating antibodies. The repertoire expressed appeared similar to that found previously following syringe infection or cyclic infection by an early variant in trypanosensitive and trypanoresistant bovids. The late variant used to infect the Glossina, however, appeared earlier, immediately after the dominant variants. These results also confirm that the sensitivity of certain bovids to trypanosomiasis is not due to the expression of different antigenic variants.