Seroprevalence of infection with Mycobacterium avium subspecies paratuberculosis, bovine leukemia virus, and bovine viral diarrhea virus in maritime Canada dairy cattle.
Seroprevalence of infection with Mycobacterium avium subspecies paratuberculosis, bovine leukemia virus, and bovine viral diarrhea virus in maritime Canada dairy cattle.
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加拿大沿海奶牛中鸟分枝杆菌亚种副结核、牛白血病病毒和牛病毒性腹泻病毒感染的血清阳性率。
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
J. Wichtel
中科院分区：
文献类型：
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作者：
J. VanLeeuwen;G. Keefe;Rob Tremblay;Christine Power;J. Wichtel
本研究的目的是调查新玩法、新斯科舍省和爱德华王子岛奶牛生产限制性疾病病原体感染的血清阳性率。在每个省随机选择30个牛群，每群随机选择30头牛，进行牛白血病病毒（BLV）和副结核分枝杆菌（M.对5头6月龄以上未接种疫苗的牛进行牛病毒性腹泻病毒（BVDV）抗体检测。对于BLV，20.8%（15.8%至27.0%）的奶牛呈阳性，70.0%（60.3%至79.7%）的牛群至少有1头阳性奶牛。在BLV阳性畜群中，平均BLV患病率为30.9%（24.8%至37.2%）。支原体副结核病，2.6%（1.8%至3.9%）的奶牛为阳性，16.7%（8.8%至24.5%）的牛群至少有2个M。副结核病阳性奶牛。In M.副结核病阳性牛群中，平均M.副结核患病率为8.5%（6.9%至10.1%）。对于BVDV，46.1%（35.5%-56.7%）的牛群至少有1头BVDV阳性动物的滴度大于或等于1：64。
The purpose of this study was to survey the seroprevalence of infection with the agents of production-limiting diseases in dairy cattle in New Brunswick, Nova Scotia, and Prince Edward Island. In 30 randomly selected herds per province, 30 cattle per herd were randomly selected and tested for antibodies to bovine leukemia virus (BLV) and Mycobacterium avium subspecies paratuberculosis (M. paratuberculosis), while 5 unvaccinated cattle over 6 months of age were tested for antibodies to bovine viral diarrhea virus (BVDV). For BLV, 20.8% (15.8% to 27.0%) of cows were positive, and 70.0% (60.3% to 79.7%) of herds had at least one positive cow. In BLV-positive herds, the average BLV prevalence was 30.9% (24.8% to 37.2%). For M. paratuberculosis, 2.6% (1.8% to 3.9%) of cows were positive, and 16.7% (8.8% to 24.5%) of herds had at least 2 M. paratuberculosis-positive cows. In M. paratuberculosis-positive herds, the average M. paratuberculosis prevalence was 8.5% (6.9% to 10.1%). For BVDV, 46.1% (35.5% to 56.7%) of herds had at least 1 BVDV-positive animal with a titer greater than or equal to 1:64.