[Study of antiviral activity of different drugs against bovine herpes virus and pestivirus].

In vitro antiviral activity of 11 different drugs against the viruses of infectious bovine rhionotracheitis (IBR) and bovine viral diarrhea (BVD) was studied. The ID50 of the drugs were determined in monolayers of cell cultures MDBK and KCT: 20 mcg/ml for anandin, 25 mcg/ml for polyprenole, 50 mcg/ml for bromuridin, methisazone, aciclovir, gossypole, ribavirin and liposomal ribavirin, 100 mcg/ml for eracond, and 200 mcg/ml for phosprenil and argovit. Phosprenil was the only drug that showed virucidal activity against the IBR virus. All the drugs inhibited reproduction of the IBR virus in sensitive cell culture MDBK: 100,000-fold inhibition by bromuridin, aciclovir, ribavirin and methisazone, 1000-10000-fold inhibition by liposomal ribavirin, gossypole, anandin, polyprenole and phosprenil, 100-fold inhibition by eracond and argovit. As for the BVD virus, bromuridin, phosprenil, polyprenole, methisazone, aciclovir, gossypole, argovit, ribavirin and liposomal ribavirin also showed their activity in cell culture KCT (100-10,000-fold inhibition). The other drugs were ineffective.