Nematode parasitism in adult dairy cows in Belgium
Nematode parasitism in adult dairy cows in Belgium
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DOI：
10.1016/s0304-4017(00)00232-6
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发表时间：
2000-06-10
影响因子：
2.6
通讯作者：
Vercruysse, J
中科院分区：
文献类型：
--
作者：
Agneessens, J;Claerebout, E;Vercruysse, J
从1997年11月至1998年10月，在比利时收集了121头奶牛的皱胃、血液和粪便样本，并对线虫感染进行了检查。110只动物的皱胃中存在线虫。110头皱胃检出奥斯特线虫，65头检出毛圆线虫，14头检出血矛线虫。总体而言，回收的所有圆线虫中91%为奥斯特线虫。奥斯特线虫的几何平均总数为2750头，平均抑制率为74%。在11月至2月期间，>90%的奥斯特线虫负荷为EL 4期。大多数动物（56%）的奥斯特线虫负荷较低（100-5000），15%的动物负荷较高（> 10，000）。共培养物的阳性率为64%，回收的属为奥斯特线虫属（100%）、毛圆线虫属（42%）、食道口线虫属（32%）、血矛线虫属（29%）和古柏线虫属（16%）。季节性模式是明显的血清奥斯特线虫特异性抗体和血清胃蛋白酶原浓度，最高水平在夏季，冬季低值。在8只（7%）动物的血清中检测到胎生网尾线虫特异性抗体。(C)2000 Elsevier Science B. V.保留所有权利。
Over a period of 1 year, from November 1997 to October 1998, the abomasa, blood and faecal samples of 121 dairy cows in Belgium were collected and examined for nematode infections. Nematodes were present in the abomasa of 110 animals. Ostertagia was found in all 110, Trichostrongylus was seen in 65 and Haemonchus in 14 abomasa. Overall, 91% of all trichostrongylus recovered were Ostertagia. The geometric mean total number of Ostertagia was 2750, with an average of 74% inhibited early fourth stage larvae (ELA). Between November and February >90% of the Ostertagia worm burden were EL4 stages. The majority of the animals (56%) harboured a low Ostertagia burden (100-5000) and 15% had a high burden (>10,000). Sixty-four percent of the coprocultures were positive and the genera recovered were Ostertagia sp. (100%), Trichostrongylus sp. (42%), Oesophagostomum (32%), Haemonchus sp. (29%) and Cooperia sp. (16%). A seasonal pattern was evident for serum Ostertagia-specific antibodies and for serum pepsinogen concentration, with the highest levels during the summer, and low values during the winter. Dictyocaulus viviparus specific antibodies were detected in the serum of eight (7%) animals. (C) 2000 Elsevier Science B.V. All rights reserved.