Advances in the Duck Hepatitis A virus and lessons learned from those in recent years.

Duckviral hepatitis (DVH) is a highly lethal and highly transmissible viral infectious disease of ducklings caused by the Duck Hepatitis A virus (DHAV), which is characterized by clinical neurological symptoms and liver enlargement with spot-like hemorrhages. In recent years, the change in diagnosis, prevention, and control of the disease has brought great challenges due to the mutation and recombination of epidemic strains, outbreaks and epidemics of genotype 3 (DHAV-3), and the rising trend of mixed infections. Here, we review DHAV on aspects of molecular biological characteristics, epidemiology, pathologic changes, pathogenesis, diagnosis, prevention, and control of the DVH to provide a scientific basis for basic and applied research in the future.