Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, Tennessee, USA.
Department of Biomedical and Diagnostic Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, Tennessee, USA.
J Vet Intern Med. 2021 Jul;35(4):2075-2080. doi: 10.1111/jvim.16191. Epub 2021 Jun 1.
Salmonella enterica serovar Dublin (S. Dublin) was diagnosed in a dairy herd after signs of acute gastroenteritis and sepsis. Two hundred eighty-three Holstein cattle were sampled resulting in 700 observations, and serology for S. Dublin was performed. Holstein cattle sampled were divided by origin and arrival date to determine on-farm exposure. Prevalence estimates were calculated and compared with control measures implemented on the dairy during the outbreak. One group of cows, presumed to be the original carrier animals, had the highest overall seroprevalence (76.5%). Seroprevalence decreased throughout the study, coinciding with testing and management changes. This report documents biosecurity measures that identified S. Dublin after the purchase of subclinical carrier cattle and the steps taken to successfully control herd transmission.
都柏林沙门氏菌血清型（S. Dublin）在出现急性肠胃炎和败血病症状后，于一个奶牛场被确诊。对 283 头荷斯坦奶牛进行了采样，共获得 700 个观察结果，并对都柏林沙门氏菌进行了血清学检测。根据来源和到达日期对采样的荷斯坦奶牛进行了分组，以确定农场内的暴露情况。对暴发期间在奶牛场实施的防控措施进行了比较，计算了流行率估计值。一群奶牛被认为是最初的携带动物，其总体血清阳性率最高（76.5%）。血清阳性率在整个研究过程中逐渐下降，与检测和管理的变化相一致。本报告记录了在购买亚临床携带牛后采取的生物安全措施，这些措施确定了都柏林沙门氏菌的存在，并采取了措施成功控制了牛群的传播。
