Abbott E M, Parkins J J, Holmes P H
Res Vet Sci. 1985 Jan;38(1):6-13.
An experiment was conducted to examine the influence of dietary protein on parasite establishment and pathogenesis of Haemonchus contortus in lambs of two breeds. Finn Dorset and Scottish Blackface. The lambs were introduced to high protein (170 g crude protein (CP) kg-1 dry matter (DM) or low protein (88 g CP kg-1 DM) diets at three months old and infected one month later with 125 larvae (kg bodyweight)-1. Blood and faecal samples were collected for analysis and bodyweights recorded weekly. The lambs were killed 20 weeks after infection. A second experiment was conducted in Blackface lambs solely to determine the influence on parasite establishment of the high and low protein diets following infection with 125 larvae kg-1. These lambs were killed five or 14 weeks after infection. Results showed that in Scottish Blackface lambs dietary protein did not significantly influence the establishment of H contortus. However, in Finn Dorset lambs dietary protein may have influenced parasite establishment since lambs on the low protein diet had a higher faecal egg output four weeks after infection and more severe clinical signs than infected lambs of the same breed on a high protein diet.
开展了一项实验，以研究日粮蛋白质对两个品种羔羊（芬多赛特羊和苏格兰黑脸羊）体内捻转血矛线虫感染和发病机制的影响。羔羊在三个月大时开始采食高蛋白（170克粗蛋白（CP）/千克干物质（DM））或低蛋白（88克CP/千克DM）日粮，一个月后感染125条幼虫/千克体重。每周采集血液和粪便样本进行分析，并记录体重。感染20周后宰杀羔羊。在黑脸羊中单独开展了第二项实验，以确定感染125条幼虫/千克体重后，高蛋白和低蛋白日粮对寄生虫感染的影响。这些羔羊在感染后5周或14周宰杀。结果表明，在苏格兰黑脸羊中，日粮蛋白质对捻转血矛线虫的感染没有显著影响。然而，在芬多赛特羊中，日粮蛋白质可能影响了寄生虫感染，因为低蛋白日粮组的羔羊在感染后四周粪便虫卵产量更高，临床症状比相同品种的高蛋白日粮感染羔羊更严重。
