Stachurski F, Musonge E N, Achu-kwi M D, Saliki J T
Animal and Veterinary Research Centre Wakwa, Ngaoundere, Cameroon.
Vet Parasitol. 1993 Sep;49(2-4):299-311. doi: 10.1016/0304-4017(93)90128-a.
The effect of natural tick infestation on the liveweight gain (LWG) of male Gudali zebu cattle was studied throughout a year by comparing the performances of two herds, one of which was submitted to weekly acaricidal treatment and the other was left untreated against ticks. Six species of ticks were identified on the untreated animals: Amblyomma variegatum, Boophilus decoloratus, Rhipicephalus lunulatus, Rhipicephalus turanicus, Hyalomma nitidum and Hyalomma marginatum rufipes. Most of the losses observed in the untreated herd during the rainy season were due to A. variegatum, and the loss in LWG was estimated to be 55-76 g per engorged female A. variegatum. The infestation also leads to wounds and to lesions of dermatophilosis. There was an interval between the peak infestation by A. variegatum and the appearance of weight loss owing to them. The control of ticks on the Gudali zebu in Adamawa, during the months of high infestation by A. variegatum adults, is economically profitable. On the other hand, the performances of the two herds during the dry season were similar, showing that infestation by larvae and nymphs of A. variegatum has no impact on the zebu LWG, and that tick control during that period is not profitable.
通过比较两个牛群的生长性能，对天然蜱虫感染对雄性古达利瘤牛体重增加（LWG）的影响进行了为期一年的研究。其中一个牛群每周进行杀螨处理，另一个牛群不进行蜱虫防治。在未处理的动物身上鉴定出六种蜱虫：杂色花蜱、消色牛蜱、新月扇头蜱、图兰扇头蜱、光亮璃眼蜱和边缘璃眼蜱棕足亚种。在雨季，未处理牛群中观察到的大多数损失是由杂色花蜱造成的，据估计，每只饱血的杂色花蜱会导致LWG损失55 - 76克。蜱虫感染还会导致伤口和嗜皮菌病病变。杂色花蜱的感染高峰与因蜱虫导致的体重减轻出现之间存在时间间隔。在杂色花蜱成虫感染高峰期的几个月里，对阿达马瓦地区的古达利瘤牛进行蜱虫防治在经济上是有利可图的。另一方面，两个牛群在旱季的生长性能相似，这表明杂色花蜱幼虫和若虫的感染对瘤牛的LWG没有影响，并且在该时期进行蜱虫防治无利可图。
