中文摘要：

2012年山东省青岛市某蛋鸡养殖场中出现病鸡消瘦,产蛋量下降,剖检以肝脏、肺脏、肾脏、胰腺等多处内脏器官出现灰白色肿瘤病灶为特征的病例,经病理组织学检查,瘤组织呈灶性或多中心性,细胞形态较一致,通过内脏型马立克氏病的病理变化鉴别观察,并结合该病例的临床症状,初步诊断为鸡淋巴细胞性白血病,并对本病的防控措施提出了建议。

英文摘要：

There were some chickens,collected from a layers farms of Qingdao in 2012,troubled with a disease which caused declining of weight and egg laying,and the clinic anatomise showed that the surfaces of viscus such as livers,lungs,kidneys and pancreases appeared many off-white tumor lesions.The pathological histology analysis result showed that these tumor lesions were of multifocal or multicentric,and the shape of these tumor cells were consistent.Identified pathological changes when infected Marek＇s disease virus,the disease was identified to be the chicken lymphocytic leukemia,and some suggestions for the ways to prevent and control the disease were put forward.