Cherenet T, Sani R A, Speybroeck N, Panandam J M, Nadzr S, Van den Bossche P
Faculty of Veterinary Medicine, University Putra Malaysia, 43400 Serdang, Malaysia.
Vet Parasitol. 2006 Sep 10;140(3-4):251-8. doi: 10.1016/j.vetpar.2006.04.004. Epub 2006 May 3.
A study was conducted to determine the incidence of trypanosome infections in cattle in tsetse-free and tsetse-infested zones of the Amhara Region of northwest Ethiopia. A total of six sentinel herds were established and the cattle observed during a period of 8 consecutive months. The prevalence of seropositive cattle was high in both the tsetse-free and tsetse-infested zones. The average monthly incidence of trypanosome infection, determined using molecular diagnostic tools, was 20.9% and 25.7% in the tsetse-free and the tsetse-infested zones, respectively. In the tsetse-free, Trypanosoma vivax was responsible for 90.9% of the cattle trypanosome infections. In the tsetse-infested zone, Trypanosoma congolense and T. vivax contributed almost equally to the trypanosome infections in cattle. Trypanosome infection, regardless of species, resulted in anaemia as evidenced by a significant decrease in the packed cell volume of the infected animal. The outcome of this longitudinal study suggests that control of trypanosomiasis in the Amhara Region cannot be achieved by tsetse control alone. Supplemental measures to include drug therapy and biting fly control are discussed.
开展了一项研究，以确定埃塞俄比亚西北部阿姆哈拉地区无舌蝇区和有舌蝇区牛的锥虫感染发生率。总共建立了6个哨兵畜群，并对牛进行了连续8个月的观察。无舌蝇区和有舌蝇区血清阳性牛的患病率都很高。使用分子诊断工具确定，无舌蝇区和有舌蝇区锥虫感染的月平均发生率分别为20.9%和25.7%。在无舌蝇区，牛锥虫感染中有90.9%是由活泼锥虫引起的。在有舌蝇区，刚果锥虫和活泼锥虫对牛锥虫感染的贡献几乎相同。无论锥虫种类如何，锥虫感染都会导致贫血，这可通过感染动物的红细胞压积显著降低得到证明。这项纵向研究的结果表明，阿姆哈拉地区锥虫病的控制不能仅通过控制舌蝇来实现。文中还讨论了包括药物治疗和控制叮咬蝇在内的补充措施。
