Co-infection of vvMDV with multiple subgroups of avian leukosis viruses in indigenous chicken flocks in China.

In China， although the ALV eradication program and the MD vaccination strategy greatly reduce the disease burdens caused by the infection of ALV and MDV， the frequent emergence of novel ALV-K or vvMDV in the vaccinated chicken flock challenges the current control strategies for both diseases.

Co-infection，MDV，Molecular analysis，Multiple