Willett K C
Bull World Health Organ. 1972;47(6):747-9.
Studies of trypanosome infections in over 3 500 young and adult cattle in the Lambwe Valley of Kenya showed the presence of Trypanosoma congolense, T. vivax, and T. brucei in single or multiple infections. Some of the multiple infections were much more frequent than would have been expected on the basis of chance, but only if T. brucei was one of the infective agents. Some studies of malaria infections in man show a similar phenomenon.
对肯尼亚拉姆韦山谷3500多头成年和幼年牛的锥虫感染研究表明,存在刚果锥虫、活跃锥虫和布氏锥虫的单一感染或混合感染。一些混合感染比随机情况下预期的更为频繁,但只有当布氏锥虫是感染源之一时才会如此。一些对人类疟疾感染的研究也显示出类似现象。