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新城疫病毒野毒株的分离及其致病新特点
Isolation of Virulent Wild Strain of NDV and Its New Pathogenic Characteristics
【摘要】 1998年 4月份 ,本厂收检 2 0日龄患病肉仔鸡 8只。发病群临症主要表现为扭颈、后退、长病程 (2周以上 )、高死亡率 (90 %~ 10 0 % )及内脏无眼观病变。迫杀取病料以SPF鸡胚分离出新城疫病毒 (NDV)。经致病性检验证明分离物为NDV野外强毒株 (该强毒株可被常规抗NDV血清中和 )。说明目前已经出现了仅表现单一神经症状而内脏又无眼观病变、长病程且高死亡率的“新型ND”。
【Abstract】 In April 1998,8 sick broilers of 20_day_old are tested in my factory.Symptom of sick avian flock are turn neck,step back,the longer sick period(>2week)and high mortality(>90%~100%),and there are no macroscopic lesion can be seen on the internal organs.Sick broilers are killed,then their specimens are taken.NDV have been isolated by SPF CE from the specimens. The NDV are proved to be virulent field strain by virulence test (the virulent field strain can be neutralized by common positive serum of anti_NDV).It shows that new type ND(NTND)have appeared at present, and the NTND display only pure nerve symptom, the longer sick period,high mortality and that there are no marcoscopic lesion can be seen on the internal organs.
【Key words】 Virulent field strain of NDV; Virus Isolation; Nerve symptom; New type of ND(NTND);
- 【文献出处】 中国预防兽医学报 ,CHINESE JOURNAL OF PREVENTIVE VETERINARY MEDICINE , 编辑部邮箱 ,2000年03期
- 【分类号】S852.65
- 【被引频次】16
- 【下载频次】46