Keywords reticuloendotheliosis virus;subgroup J avian leucosis virus;co-infevtion;epidemiology;synergism;immunosuppression;HI antibody;vaccine;

• 禽网状内皮组织增生病病毒;J亚群白血病病毒;共感染;流行病学;免疫抑制;协同作用;疫苗;HI抗体;