Almería S, Gracia M J, Llorente M, Uriarte J
Unidad de Sanidad Animal, Parasitología, Servicio de Investigación Agraria (D.G.A.), Zaragoza, Spain.
Vet Parasitol. 1996 Jun;63(3-4):345-53. doi: 10.1016/0304-4017(95)00898-5.
The susceptibility of two common breeds of cattle in the Pyrenees, Brown Swiss and Pyrenean breed, to parasitism by gastrointestinal nematodes was studied. Twenty-two female calves (13 Brown Swiss and 9 Pyrenean), 3 months old with a mean weight of 112.8 +/- 18.33 and 103.3 +/- 17.11 kg respectively at the start of the study, were used. The calves began their first grazing season grazing with 200 cattle following the traditional grazing system for mountainous areas: Stabling during winter (December-April), grazing on harvesting meadows at an elevation of 900 m in the spring (May-June) and autumn (October-November), and grazing areas between 1200-2100 m during the summer (July-September). Faeces, blood samples and calves growth rate were taken at 2-week intervals throughout the grazing season. Faecal egg counts of gastrointestinal nematodes, level of serum pepsinogen, total serum protein and blood parameters were measured. The worm egg counts and Cooperia sp. counts were significantly smaller in the calves of Pyrenean breed than in Brown Swiss throughout the experiment. Numbers of eggs of the other genera of parasites found were smaller in the calves of Pyrenean breed than in calves of Brown Swiss breed, but no statistical differences were found. Blood was compared during two periods: the prepatent and patent periods. During the first period, no differences were found between the breeds for any parameter studied. However, during the patent period, Pyrenean animals had significantly greater numbers of erythrocytes, haemoglobin values and packed cell volume (PCV) values, and smaller numbers of eosinophils than animals of the Brown Swiss breed. No differences were found in the level of serum pepsinogen, total serum protein and live weight gains between the two breeds.
研究了比利牛斯山脉两种常见牛品种——瑞士褐牛和比利牛斯品种对胃肠道线虫寄生的易感性。使用了22头雌性犊牛（13头瑞士褐牛和9头比利牛斯品种），研究开始时它们3个月大，平均体重分别为112.8±18.33千克和103.3±17.11千克。这些犊牛按照山区传统放牧系统与200头牛一起开始它们的第一个放牧季节：冬季（12月至4月）圈养，春季（5月至6月）和秋季（10月至11月）在海拔900米的收割草地上放牧，夏季（7月至9月）在1200 - 2100米之间的放牧区域放牧。在整个放牧季节，每隔2周采集粪便、血液样本并测量犊牛生长率。测量了胃肠道线虫的粪便虫卵计数、血清胃蛋白酶原水平、总血清蛋白和血液参数。在整个实验过程中，比利牛斯品种犊牛的蠕虫虫卵计数和库珀属线虫计数显著低于瑞士褐牛。在比利牛斯品种犊牛中发现的其他寄生虫属的虫卵数量比瑞士褐牛品种的犊牛少，但未发现统计学差异。在两个时期对血液进行了比较：潜伏期和发病期。在第一个时期，所研究的任何参数在两个品种之间均未发现差异。然而，在发病期，比利牛斯品种的动物红细胞数量、血红蛋白值和红细胞压积（PCV）值显著高于瑞士褐牛品种的动物，嗜酸性粒细胞数量则较少。两个品种在血清胃蛋白酶原水平、总血清蛋白和体重增加方面未发现差异。
