Cenci F B, Louvandini H, McManus C M, Dell'Porto A, Costa D M, Araújo S C, Minho A P, Abdalla A L
Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, Distrito Federal, CP 04508, Brasília 70910-900, Brazil.
Vet Parasitol. 2007 Mar 15;144(1-2):132-7. doi: 10.1016/j.vetpar.2006.09.021. Epub 2006 Oct 25.
The effect of tannins on endoparasite control in hair sheep was investigated using 20 entire lambs of the Santa Inês breed. At the beginning of the experiment these animals were 6-months old and weighed 22.5kg+/-4.7. The treatments used were (10 animals each): GT (animals receiving 18g of Acácia negra containing 18% of condensed tannin/animal/week) and GC (animals not receiving tannin). The experiment lasted 84 days, with animals kept on an Andropogon gayanus pasture. Faeces were collected weekly, with weighing and blood collection carried out fortnightly. At slaughter, the adult worms were harvested for identification and counting. Although the GT animals weighed more than the GC lambs at slaughter, these differences were not significant (P>0.05). In general, the values for haemoglobin, hematocrit, total protein, urea, phosphorus and calcium in the serum were within normal levels and no significant differences between groups were observed. For faecal egg count (FEC), lower values were observed throughout the experiment in the group receiving tannin, but these differences were only significant in the eighth week. There was a lower output of eggs by regression for GT compared with GC (P<0.05). The species identified, in decreasing order of worm count, were: Trichostrongylus colubriformis, Haemonchus contortus, Oesophagostomum columbianum, Cooperia sp., Strongyloides papillosus, Trichuris globulosa and Moniezia expansa. The total worm count and number of each species of worm were lower for GT compared with GC for T. colubriformis and Cooperia sp. (P<0.05). Condensed tannin (CT) from A. negra had an antiparasitic effect, thereby representing an alternative for worm control in sheep.
使用20只圣伊内斯品种的成年羔羊，研究了单宁对毛用绵羊体内寄生虫控制的影响。实验开始时，这些动物6个月大，体重为22.5千克±4.7千克。所采用的处理方式为（每组10只动物）：GT组（动物每周每只接受18克含18%缩合单宁的黑荆树）和GC组（动物不接受单宁）。实验持续84天，动物饲养在髯毛鸭茅牧场上。每周收集粪便，每两周进行称重和采血。屠宰时，采集成虫进行鉴定和计数。尽管屠宰时GT组动物的体重高于GC组羔羊，但这些差异不显著（P>0.05）。总体而言，血清中的血红蛋白、血细胞比容、总蛋白、尿素、磷和钙的值均在正常水平，两组之间未观察到显著差异。对于粪便虫卵计数（FEC），在整个实验过程中，接受单宁组的值较低，但这些差异仅在第八周显著。与GC组相比，GT组通过回归分析得出的虫卵产出较低（P<0.05）。鉴定出的种类按虫数递减顺序为：蛇形毛圆线虫、捻转血矛线虫、哥伦比亚食道口线虫、库珀属线虫、乳头类圆线虫、球形毛首线虫和扩展莫尼茨绦虫。与GC组相比，GT组的蛇形毛圆线虫和库珀属线虫的总虫数及每种虫的数量较低（P<0.05）。黑荆树中的缩合单宁（CT）具有抗寄生虫作用，因此是绵羊蠕虫控制的一种替代方法。
