Nondifferentiable pseudorabies vaccine disapproved.

21—64.152(163,166D) Nondifferentiable pseudorabies vaccine disapproved. The only pseudorabies vaccine or pseudorabies vaccine combination used in this state shall be a differentiable vaccine. After July 1, 1993, this vaccine must be differentiable by a licensed and approved differentiable pseudorabies test capable of determining gp1 negative swine vaccinated with a gp1 gene deleted vaccine.