Kampa Jaruwan, Alenius Stefan, Emanuelson Ulf, Chanlun Aran, Aiumlamai Suneerat
Department of Clinical Sciences, P.O. Box 7054, SLU, SE-75007 Uppsala, Sweden.
Vet J. 2009 Nov;182(2):223-30. doi: 10.1016/j.tvjl.2008.07.006. Epub 2008 Aug 28.
The epidemiology of bovine herpesvirus type 1 (BHV-1) and bovine viral diarrhoea virus (BVDV) was studied in a population of small dairy herds that had not been vaccinated. Bulk tank milk samples of 186 herds in Thailand were collected four times between 2002 and 2004. Serum samples from individual animals in 11 herds were also taken on three occasions. The prevalence of BHV-1 in the 186 herds was 61% in 2002, decreasing to 48% in 2004 and for BVDV was 91% in 2002, decreasing to 72% in 2004. A BVDV antigen-positive calf was found in one of the 11 herds, and animals in this herd and three other herds seroconverted to a recently described atypical BVDV strain (HoBi). This study showed a significantly decreasing prevalence for both BHV-1 and BVDV due to a self-clearance process. Further studies are needed to find out how the atypical BVDV strain entered the cattle population.
对一群未接种疫苗的小型奶牛场中的牛疱疹病毒1型（BHV - 1）和牛病毒性腹泻病毒（BVDV）的流行病学进行了研究。2002年至2004年期间，从泰国186个牛场收集了四次散装罐牛奶样本。还在11个牛场中对个体动物的血清样本进行了三次采集。2002年，186个牛场中BHV - 1的流行率为61%，到2004年降至48%；BVDV在2002年的流行率为91%，到2004年降至72%。在11个牛场中的一个发现了一头BVDV抗原阳性的小牛，该牛场以及其他三个牛场的动物血清转化为最近描述的一种非典型BVDV毒株（HoBi）。这项研究表明，由于自我清除过程，BHV - 1和BVDV的流行率均显著下降。需要进一步研究以查明非典型BVDV毒株是如何进入牛群的。
