北疆绵羊慢病毒感染的血清学调查

Serologic Survey of Ovine Lentivirus Infection in Northern Xinjiang

北疆某羊场的５群成年新疆美利奴母羊，用琼脂凝胶免疫扩散试验检查其对绵羊慢病毒（ｏｖｉｎｅｌｅｎｔｉｖｉｒｕｓＯｖＬＶ）的血清抗体。１０７５只受试母羊中，８只为血清学阳性，６只为血清学可疑，平均血清学阳性率为０．８５％（０．７％～１．０％）。在８只血清学阳性母羊中，７只来自第３群而另１只来自第５群。６只母羊有对ＯｖＬＶ核心蛋白ｐ２６的血清抗体，１只有对ＯｖＬＶ包膜蛋白ｇｐ１３５的抗体，１只有对ｐ２６与ｇｐ１３５二者的抗体。由１５６只老母羊组成的第３群的血清学阳性率为４．５％，与２岁的第２群、４岁的第１，４群的血清学阳性率０和３岁的第５群的０．４％相比，结果证明血清学阳性率随年龄增长而增加。此外，还讨论了ＯｖＬＶ感染的控制。

Adult Xinjiang Merino (Xinjiang type of China Merino) ewes from a sheep farm in northern Xinjiang were tested for serum antibody to ovine lentivirus (OvLV) by using agar gel immunodiffusion (AGID) test .Of 1 075 ewes tested,8 ewes were seropositive and 6 ewes were suspicious, the average seropositive rate was 0.85%(0.7%～1.0%).Of 8 seropositive ewes, 7 ewes originated from flock No.3 and another one was from flock No.5.6 ewes had serum antibody against OvLV core protein p26 , 1 ewe had antibody to OvLV envelope glycoprotein gp135, and another one ewe had antibodies to both p26 and gp135. Flock No.3 consisting of 156 older ewes had seropositive rate of 4.5%,this result showed seropositive rate increasing with age compared to the seropositive rate of 0(in flock No.2 of 2 year olds and flock No.1,4 of 3 year olds) to 0.4%(in flock No.5 of 3 year olds).The breed susceptivity to OvLV and control of OvLV and control of OvLV infection were discussed.