VVNDVVelogenic Viscerotropic Newcastle Disease Virus
References in periodicals archive ?
The incidence of VVNDV declined dramatically owing to the introduction of different types of ND vaccines in commercial poultry (Folitse et al.
1999) and he found that 1:2 ratio is the best for the purpose and conferred 80% protection when challenged with VVNDV.
At six weeks postboosting, the birds of each group were challenged by injecting the VVNDV, with 64 HA titre at 0.