The Orma Boran—ten years of field observations

Abstract

In 1913 Balfour reported Bos indicus cattle in the Koalib area of Sudan which he claimed were immune to trypanosomiasis (Balfour, 1913). Since that date trypanotolerance has been reported in other Bos indicus breeds in Sudan, Zaire, Uganda and Kenya (see Dolan, 1987 for references). Yet, despite these reports in the literature, little effort has been made to investigate the nature or extent of differential susceptibility to trypanosomiasis amongst