Littlejohns I R, Burton R W
New South Wales Department of Agriculture, Glenfield.
Aust J Biol Sci. 1988;41(4):571-8. doi: 10.1071/bi9880571.
Three surveys of cattle for bluetongue (BLU) antibody were conducted over the years 1978-1980 in coastal areas of New South Wales. In each survey the samples were identified by age. The prevalence of BLU-group antibody, demonstrated in a gel diffusion precipitin test, was highest in the north and decreased progressively to the south. Antibody prevalence increased with age. However, according to variations in prevalence by age and region, it was concluded that the activity of relevant viruses was highly variable between years and was geographically discontinuous. Evidence is presented that much of the antibody found, especially in animals less than 4 years old, failed to persist from one year to another. Factors likely to contribute to more persistent reactions in older animals are discussed. Neutralizing antibodies to bluetongue virus serotypes 1 and 21 were demonstrated and prevalence of these was associated with location and age, as was that of group-specific antibody.
1978年至1980年期间，在新南威尔士州沿海地区对牛群进行了三次蓝舌病（BLU）抗体调查。每次调查时，样本均按年龄进行分类。在凝胶扩散沉淀试验中检测到的BLU组抗体流行率在北部最高，并向南逐渐降低。抗体流行率随年龄增长而增加。然而，根据年龄和地区的流行率差异得出结论，相关病毒的活性在不同年份之间变化很大，且在地理上是不连续的。有证据表明，所发现的许多抗体，尤其是4岁以下动物体内的抗体，无法跨年持续存在。文中讨论了可能导致老年动物产生更持久反应的因素。检测到了针对蓝舌病毒血清型1和21的中和抗体，其流行率与位置和年龄有关，组特异性抗体的流行率也是如此。
