Anene B M, Chime A B, Jibike G I, Anika S M
Faculty of Veterinary Medicine, University of Nigeria, Nsukka.
Angew Parasitol. 1991 May;32(2):99-104.
A comparison of the symptomatology, haematology and prevalence of trypanosomiasis in Holstein Friesian and White Zebu cattle exposed to natural infections on a ranch in a rain forest zone of Nigeria is presented. 23 (44%) of the adult Friesians had trypanosome infections with a generally heavy parasitaemia. Infection was light in the Friesian calves and the Zebus with infection rates of 2 (6.9%) and 3 (15%) respectively. Trypanosoma vivax was the sole species encountered on the farm. There was a general unthrifty appearance in the adult Friesian herd as well as classical signs of trypanosomiasis. The Friesian calves and Zebus were generally in good conditions with an appearance of good health except one each of the infected animals which showed apparent symptoms of the disease. There was a marked reduction of the red cell values of the infected adult Friesian and Zebu cattle. The red cell values of the uninfected adult Friesians were equally depressed suggesting cryptic infections or that they were cured parasitologically by the recently administered trypanocide. The Friesian calves had normal red cell values for both the infected and uninfected. Leucocyte counts were generally high on the Farm and higher for the infected animals.
本文介绍了在尼日利亚雨林地区一个牧场中，自然感染锥虫病的荷斯坦弗里生牛和白瘤牛的症状学、血液学及锥虫病患病率的比较情况。23头（44%）成年弗里生牛感染了锥虫，寄生虫血症普遍较重。弗里生犊牛和瘤牛的感染较轻，感染率分别为2头（6.9%）和3头（15%）。农场中仅发现了活跃锥虫这一物种。成年弗里生牛群普遍呈现出不健康的外观以及锥虫病的典型症状。弗里生犊牛和瘤牛总体状况良好，看起来健康，只有每头受感染动物中的一头表现出明显的疾病症状。受感染的成年弗里生牛和瘤牛的红细胞值显著降低。未受感染的成年弗里生牛的红细胞值同样降低，这表明存在隐性感染，或者它们已通过最近施用的杀锥虫剂在寄生虫学上得到治愈。弗里生犊牛无论感染与否，红细胞值均正常。农场中白细胞计数总体较高，受感染动物的白细胞计数更高。
