在地方性感染的奶牛群中，都柏林沙门氏菌的群内流行率。
Within-herd prevalence of Salmonella Dublin in endemically infected dairy herds.
机构信息
Department of Large Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark.
出版信息
Epidemiol Infect. 2013 Oct;141(10):2074-82. doi: 10.1017/S0950268812003007. Epub 2013 Jan 18.
Abstract
In this study within-herd prevalence of Salmonella Dublin was investigated in three age groups (calves, young stock, adult cows) during five herd visits at 3-month intervals of 14 endemically infected dairy herds. A total of 10162 paired faecal cultures and antibody measurements were used to calculate the age and temporal dynamics of seroprevalence and prevalence of positive faecal cultures. Faecal culture-positive prevalence was generally low. It was highest (5.4%) in calves during December to February. Seroprevalence varied from 0% to 70% between herds, but was generally more stable in young stock and adult cows than in calves. Hierarchical mixed-model results showed that seroprevalence was associated with the bacteriological status in calves and cows, but not in young stock. These results can be used to develop and validate theoretical infection dynamics models and to design effective control programmes for Salmonella Dublin in dairy herds.
摘要
在这项研究中，对 14 个地方性感染的奶牛场进行了为期 5 个月、每隔 3 个月进行一次的 3 个年龄组（犊牛、幼畜、成年牛）的内群流行率调查。共采集了 10162 对粪便培养物和抗体测量数据，以计算血清阳性率和粪便培养阳性率的年龄和时间动态。粪便培养阳性率通常较低。在 12 月至 2 月期间，犊牛的阳性率最高（5.4%）。不同牛群的血清阳性率从 0%到 70%不等，但在幼畜和成年牛中通常比在犊牛中更稳定。分层混合模型结果表明，血清阳性率与犊牛和牛的细菌学状态有关，但与幼畜无关。这些结果可用于开发和验证理论感染动态模型，并为奶牛场的都柏林沙门氏菌设计有效的控制方案。
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