CD86 and infection: The cp BVDV1b-TGAC strain enhanced MHCI, MHCII, and CD86 expression, while ncp strains of BVDV (i.e., ncp BVDV2a 1373, ncp BVDV2a 28508-5, and ncp BVDV1b TGAN) reduced the MHCI, MHCII, and CD86 expression during the course of infection.