摘要
从 90年代中期起 ,国内一些肉用型种鸡场就陆续发现 ,在开产前后不断有零星死亡发生 ,主要表现在肝、脾肿大。但直到 1999年 ,我们才在国内首次分离到J亚群白血病病毒 (ALV_J)。我们从市场上临床健康商品代肉鸡及兽医院门诊死亡肉用型种鸡的随机病料分离到 2株ALV_J,还从 8个呈现肝脾增生性肿大及骨膜增生性瘤的鸡群分离到 8株ALV_J。上述毒株分别来自江苏、山东、河南和宁夏四省区的爱维因、AA和科宝品系的肉用型鸡。大多数发病鸡为开产的种母鸡或性成熟的种公鸡 ,但在商品代肉鸡中亦发现J_亚群白血病肿瘤 ,发病死亡率在 5 %～ 2 0 %。显然 ,J亚群白血病在我国各不同品系肉用型鸡中均已有不同程度流行。病毒囊膜蛋白基因比较表明 。
Epidemological studies were made on subgroup J avian leukosis in meat_type chicken flocks in China.12 avian leukosis viruses of subgroup J (ALV_J) were isolated from liver or spleen samples collected from broiler in the market in Jiangsu Province,or from suspected dead birds with enlarged livers or tumors of broiler or breeders in Shandon,Henan and Ninxia provinces during Jan.of 1999 to Apr.of 2000.The mortaliy due to ALV_J tomors were varied from 5%～20% in different flocks of various breeds.Ten cases were reported in this paper with brief description of respects in epidemiology,pathology and diagnosis.The gp85 sequence comparisons indicated that there is big diversity in their envelope protein antigenicity among Chinese isolates.
出处
《中国预防兽医学报》
CAS
CSCD
北大核心
2002年第4期292-294,共3页
Chinese Journal of Preventive Veterinary Medicine
基金
国家自然科学基金资助 (# 30 0 4 0 0 11)
