What genus is associated with the virus that causes VND?

The virus that causes Virulent Newcastle Disease (VND) is primarily associated with the genus Avulavirus. This genus is part of the family Paramyxoviridae, which includes various viruses that infect birds. The specific strain of Avulavirus responsible for Newcastle Disease is known for its high pathogenicity in domesticated and wild birds, making it a significant concern in poultry health management.

Understanding Avulavirus is crucial for recognizing symptoms, epidemiology, and control measures pertaining to VND. The other options listed refer to different virus families or genera: Orthomyxovirus is associated with influenza viruses, Paramyxovirus includes a broader range of viruses beyond just birds, and Avipoxvirus typically refers to viruses causing pox diseases in birds. Therefore, Avulavirus is the correct and specific genus related to the virus causing VND.