[Luce747]

I have read that brooders can remain infected for up to 10 weeks and that the environment can be treated with formaldehyde to inactivate the virus.

Little concerned as to whether this DVH can spread to the chicks or even humans??!! 

[kegs]

I found this Luce747.

I hope it helps but do bear in mind that not everything on the www is accurate so it might be worth trying to double or triple check it.

http://www.helium.com/items/2098537-duck-viral-hepatitis-causes-signs-and-prevention