Roelants G E, Tamboura I, Sidiki D B, Bassinga A, Pinder M
Acta Trop. 1983 Jun;40(2):99-104.
Ten animals from a reputedly trypanosensitive bovine breed, the Zebu, and ten from a reputedly trypanotolerant breed, the Baoulé, were exposed to natural trypanosome challenge in an area of high Glossina density. The ten Zebus and five of the Baoulés died within 6 to 11 weeks with heavy parasitaemia and severe anaemia. The five other Baoulés showed little or no parasitaemia, no anaemia and were all in good condition after weeks of exposure: Seven animals of a herd of Baoulé/Ndama crosses indigenous to the same area were followed concurrently and showed very rare or no patent parasitaemia. Clearly, only some individuals within a "trypanotolerant breed" are able to withstand natural fly challenge. Selection of trypanotolerant animals has to be done on an individual basis and not on the biometrical characteristics of the breed.
从一个据称对锥虫敏感的牛品种泽布牛中选取了10头动物，从一个据称对锥虫耐受的品种巴乌莱牛中选取了10头动物，在舌蝇密度高的地区让它们接受自然锥虫感染挑战。10头泽布牛和5头巴乌莱牛在6至11周内死亡，伴有严重的寄生虫血症和严重贫血。另外5头巴乌莱牛几乎没有或没有寄生虫血症，没有贫血，在暴露数周后状况良好：对同一地区本地的一群巴乌莱/恩达马杂交牛中的7头动物进行了同步跟踪，发现它们的显性寄生虫血症非常罕见或没有。显然，“对锥虫耐受的品种”中只有一些个体能够承受自然的蝇类感染挑战。对锥虫耐受动物的选择必须基于个体，而不是基于品种的生物特征。
