Benz G W, Ernst J V, Egerton J R
Am J Vet Res. 1984 Apr;45(4):771-2.
Eighteen calves about 3 months old were inoculated with 3,000 Dictyocaulus viviparus infective larvae. Three groups of 6 calves each were formed. Thirteen days after inoculations, 3 of the 6 group 1 control calves were given vehicle subcutaneously (SC) and the group 2 calves were given ivermectin at the dose rate of 200 micrograms/kg, SC. Thirty-five days after inoculation, the remaining 3 calves in group 1 were given vehicle SC and the group 3 calves were given ivermectin at the dose rate of 200 micrograms/kg, SC. Necropsies were performed 42 days after inoculations. A total of 474 D viviparus was recovered from the group 1 control calves, whereas none was recovered from the calves treated when the nematodes were in the 4th stage of development (group 2) or adult stage (group 3).
18头约3月龄的犊牛接种了3000条胎生网尾线虫感染性幼虫。将其分成3组，每组6头犊牛。接种后13天，第1组6头对照犊牛中的3头皮下注射赋形剂，第2组犊牛皮下注射剂量为200微克/千克的伊维菌素。接种后35天，第1组剩余的3头犊牛皮下注射赋形剂，第3组犊牛皮下注射剂量为200微克/千克的伊维菌素。接种后42天进行剖检。第1组对照犊牛共检获474条胎生网尾线虫，而在幼虫处于第4阶段（第2组）或成虫阶段（第3组）时接受治疗的犊牛中未检获任何线虫。
