Antiviral activity of Ivermectin against PPRV. A, confluent Vero cells were exposed with different concentrations of ivermectin and cell cytotoxcic concentrations were determined 48 hrs post drug exposure using MTT assay. B, antiviral activity of ivermectin was determined using TCID50 after drug exposure during the course of infection. C, cellular morphology at 400x magnification under microscope in control cells and drug treated cells after infection. D, effect of ivermectin on viral attachment and penetration. E, effect of ivermectin on post entry stages of viral replication (0µM, virus control without drug; 0µM+DMSO, DMSO control; 2.5µM, ivermectin 2.5µM).