青海省农业区主要猪病的流行病学调查

An epidemiological investigation of the main porcine diseases in the agricultural areas of Qinghai Province

采用ELISA检测方法和流行病学调查方法，于2004～2005年对青海省互助、湟中、大通、乐都、民和、西宁6县（市）的142个规模养猪场和部分养殖户进行了猪瘟、猪生殖与呼吸综合征、猪圆环病毒2型感染、伪狂犬病等流行状况的调查。结果显示，猪瘟、猪生殖与呼吸综合征、猪圆环病毒2型感染、伪狂犬病在青海省农业区普遍存在，6县（市）之间血清抗体阳性率无明显差异；母猪繁殖障碍覆盖了所有种猪场，后备母猪不发情率约为8．2％，产死胎、木乃伊、弱仔的母猪占繁殖母猪的21％左右；猪瘟仍然是引起当地猪死亡的主要原因。

An epidemiological investigation of classical swine fever, porcine reproductive and respiratory syndrome, porcine circovirus type 2 infection, and porcine pseudorabies was carried out on 142 pig farms in the agricultural areas including Huzhu, Huangzhong, Datong, Ledu and Minhe counties and Xining Prefecture of Qinghai in 2004-2005 by using ELISA and epidemiological method. In results, the above-mentioned diseases were quite common in the agricultural areas of the Province. The positive rates of serum antibodies against CSF, PRRS, PCT2I or PPR were not significantly different among the five counties and the prefecture. Sow reproductive disorders occurred in all the investigated pig farms with 8.2 % of non-estrous rate and 21% approximately of sows producing dead embryo, mummy foetus or weak piglet in all reproductive sows. The results showed that CSF was still the main infectious disease causing death of pigs in these areas.