Within-herd prevalence of Salmonella Dublin in endemically infected dairy herds 期刊名称： Epidemiology & Infection
作者： NIELSEN,L. R.一字网名
这件事我做对了作文年份： 2013年三年期定期存款利率
期号： 第10期
平行线公理关键词： Antibody; cattle; faecal culture; prevalence; Salmonella Dublin
摘要：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 ud to calculate the age and temporal dynamics of roprevalence 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 you
职工ng stock and adult cows than in calves. Hierarchical mixed-model results showed that roprevalence was associated with the bacteriological status in calves and cows, but not in young stock. The results can be ud to develop
胃肠感冒的症状
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