Federal University of Viçosa, Department of Veterinary Medicine, Laboratory of Parasitology, Av. P.H. Rolphs-Viçosa Campus, Zip code 36570 000, Viçosa-Minas Gerais, Brazil.
Exp Parasitol. 2012 Nov;132(3):373-7. doi: 10.1016/j.exppara.2012.08.013. Epub 2012 Sep 4.
The efficacy of a fungal formulation based on the nematophagous fungus Duddingtonia flagrans was assessed in the control of cattle trichostrongyles. Twenty male Nellore calves, six-month-old, divided in two groups (fungus-treated and control without fungus) were fed on a pasture of Brachiaria decumbens naturally infected with larvae of bovine trichostrongyles. Animals of the treated group received doses of sodium alginate mycelial pellets orally (1 g/10 kg live weight, twice a week), for 12 months. Feces samples were collected for egg count (eggs per gram of feces-EPG) and coprocultures during 12 months. There was a significant reduction in EPG (56.7%) and infective larvae (L3) in coprocultures (60.5%) for animals of the treated group in relation to the control group at the end of the study. There was a significant reduction of L3 (64.5%) in herbage samples collected up to 0-20 cm from fecal pats and 73.2% in distant samples (20-40 cm) between the fungus-treated group and the control group. The treatment with sodium alginate pellets containing the nematode trapping fungus D. flagrans reduced trichostrongylid in tropical southeastern Brazil and could be an effective tool for biological control of this parasitic nematode in beef cattle.
基于食线虫真菌 Duddingtonia flagrans 的真菌制剂对牛捻转血矛线虫的控制效果进行了评估。20 头 6 月龄的雄性内罗尔小牛分为两组（真菌处理组和无真菌对照组），在受感染的 Brachiaria decumbens 牧场上饲养，感染有牛捻转血矛线虫幼虫。处理组的动物口服海藻酸钠菌 pellet（1 g/10 kg 活体重，每周两次），持续 12 个月。在 12 个月内收集粪便样本进行卵计数（每克粪便中的卵-EPG）和粪便培养。与对照组相比，研究结束时，处理组动物的 EPG（56.7%）和粪便培养中的感染性幼虫（L3）（60.5%）显著减少。在处理组和对照组之间，从粪便垫收集的 0-20cm 高的草料样本中 L3 减少了 64.5%，而 20-40cm 高的样本中 L3 减少了 73.2%。含有食线虫真菌 D. flagrans 的海藻酸钠 pellet 处理减少了巴西东南部热带地区的捻转血矛线虫，并且可能是牛肉生产中控制这种寄生线虫的有效工具。
