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首页> 外文期刊>Vector borne and zoonotic diseases >Bulk-Tank Milk Longitudinal Serosurvey Reveals Decreasing Schmallenberg Virus Circulation in a Confined Population of Portuguese Sheep
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Bulk-Tank Milk Longitudinal Serosurvey Reveals Decreasing Schmallenberg Virus Circulation in a Confined Population of Portuguese Sheep

机译:散装罐牛奶纵向血清毒蕈术显示在葡萄牙羊群中的狭窄人口中减少了施马伦贝格病毒循环

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Introduction: In 2011, Schmallenberg virus (SBV) was first detected in dairy cattle herds in The Netherlands and Germany having since then spread across Europe. Today studies are starting to show a decrease in new SBV infections, a circumstance that raises alerts for possible re-emergence if ideal conditions for vector development occur. To assess the potential decrease in SBV circulation, we performed a 2-year longitudinal serological investigation for SBV infection at the herd level by using bulk-tank milk of a specific sheep breed from central Portugal. Materials and Methods: Bulk-tank milk samples from 68 flocks were collected in both 2015 and 2016, and lactosera were tested for IgG anti-SBV by EIA. Results and Discussion: Results show that in 2015, 92.6% (95% confidence interval [CI]: 83.9-96.8) of the bulk-tank milk samples were positive, whereas in 2016 only 77.9% (95% CI: 66.7-86.1 of the samples from the same flocks were positive. Differences in the 2015/2016 seroprevalences showed to be statistically significant (p = 0.027). This significant decrease at the herd level seems to be in agreement with reported data from other European countries and raise alerts, since increasingly favorable conditions (higher number of susceptible animals) are now present, potentially favoring SBV epidemics if improved conditions for midge replication occur in the future.
机译:介绍:2011年,施马伦贝格病毒(SBV)首先在荷兰和德国的奶牛群中检测到,从那以后遍布欧洲。今天的研究开始表现出新的SBV感染的降低,这种情况提高了可能的重新出现警报,如果发生的载体发育的理想条件。为了评估SBV循环的潜在降低,我们通过使用葡萄牙中央葡萄牙的特定绵羊繁殖的批量罐牛奶对畜群牛奶进行了两年的纵向血清学调查。材料和方法:2015年和2016年的68个羊群中的批量罐牛奶样品在2015年和2016年中收集,并且对EIA的IgG抗SBV测试了乳乳片。结果与讨论:结果表明,2015年,92.6%(95%置信区间[CI]:83.9-96.8)批量罐牛奶样品为阳性,而2016年仅为77.9%(95%CI:66.7-86.1)来自同一群的样品是阳性的。2015/2016 Seroprevancess的差异显示出统计学意义(P = 0.027)。群体水平的这种显着下降似乎与来自其他欧洲国家的数据报告并提出了警报,由于现在存在日益有利的条件(较高数量的易感动物),如果在将来发生了改进的MIDGE复制条件,可能有利于SBV流行病。

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