Pereira José Roberto
APTA - São Paulo State Agribusiness Technology Agency - Paraíba Valley Regional Agribusiness Technological Regional Development Hub, PO Box 07, Postcode 12 411 010, Pindamonhangaba, SP, Brazil.
Vet Parasitol. 2009 May 26;162(1-2):116-9. doi: 10.1016/j.vetpar.2009.02.014. Epub 2009 Feb 20.
Tests were performed on artificially infested bovines, kept in field conditions, to assess the efficiency of avermectins (abamectin, doramectin and ivermectin) on Boophilus microplus (Canestrini, 1887). This assessment was carried out on 40 bovines, in the Paraíba Valley, in the State of São Paulo, Brazil. These bovines were distributed into four groups (abamectin, doramectin, ivermectin and a control group), after artificial infestation with some 4000 larvae per animal on days -21, -14, -7, -1, 7 and 14. The animals from the treated groups were subcutaneously injected with the commercial avermectins, at a dose of 200microg/kg of live weight (1mL/50kg). The best results were shown by the group treated with doramectin, both in relation to the reduction of female count (an average of 85.92% between 3rd and 28th day after treatment) and also in the reduction of oviposition among the females collected from the bovines after treatment and then kept in the laboratory (an average of 83.51%). None of the avermectins proved to be efficient in inhibiting the hatching of the larvae.
对在野外条件下饲养的人工感染牛进行了试验，以评估阿维菌素（阿巴美丁、多拉菌素和伊维菌素）对微小牛蜱（Canestrini，1887）的防治效果。该评估在巴西圣保罗州帕拉伊巴山谷的40头牛身上进行。在第-21、-14、-7、-1、7和14天给这些牛每头人工感染约4000只幼虫后，将它们分为四组（阿巴美丁组、多拉菌素组、伊维菌素组和对照组）。给治疗组的动物皮下注射商业阿维菌素，剂量为每千克活重200微克（1毫升/50千克）。多拉菌素治疗组的效果最佳，无论是在减少雌蜱数量方面（治疗后第3天至第28天平均减少85.92%），还是在减少治疗后从牛身上采集并饲养在实验室中的雌蜱产卵量方面（平均减少83.51%）。没有一种阿维菌素被证明能有效抑制幼虫孵化。
