Wambura P N, Gwakisa P S, Silayo R S, Rugaimukamu E A
Department of Veterinary Microbiology and Parasitology, Sokoine University of Agriculture, Morogoro, Tanzania.
Vet Parasitol. 1998 May;77(1):63-70. doi: 10.1016/s0304-4017(97)00229-x.
The relative resistance to tick infestation of zebu (Bos indicus) in comparison to crossbred (B. indicus x B. taurus) cattle was investigated. B. indicus breeds, all belonging to Tanganyika shorthorn zebu were Meru, Mbullu and Iringa red. Crossbreds were Meru x Friesian and Iringa red x Friesian. Parameters to distinguish between 'tick resistant' and 'tick susceptible' cattle were tick counts on naturally exposed animals, serum complement levels and delayed skin hypersensitivity response to phytohaemagglutinin. Results have shown that pure zebu cattle are less infested with ticks when compared to zebu-taurine crosses under identical field conditions. Zebu cattle also had significantly higher serum complement level than crossbred cattle. While serum complement and tick burden were negatively associated (r = -0.27, P < 0.001), the cutaneous response to phytohaemagglutinin did not vary with tick infestation. The influence of cattle breed on tick infestation and serum complement level is demonstrated.
研究了瘤牛（Bos indicus）与杂交牛（B. indicus x B. taurus）相比对蜱虫侵袭的相对抗性。所有属于坦噶尼喀短角瘤牛的瘤牛品种有梅鲁牛、姆布卢牛和伊林加红牛。杂交品种为梅鲁牛×弗里斯兰牛和伊林加红牛×弗里斯兰牛。区分“抗蜱”和“易蜱”牛的参数包括自然暴露动物身上的蜱虫计数、血清补体水平以及对植物血凝素的迟发性皮肤超敏反应。结果表明，在相同田间条件下，与瘤牛 - 黄牛杂交牛相比，纯种瘤牛的蜱虫感染较少。瘤牛的血清补体水平也显著高于杂交牛。虽然血清补体与蜱虫负担呈负相关（r = -0.27，P < 0.001），但对植物血凝素的皮肤反应并未随蜱虫感染而变化。证明了牛品种对蜱虫感染和血清补体水平的影响。
