Figure 4From: Synergistic effects of acyclovir and 3, 19- isopropylideneandrographolide on herpes simplex virus wild types and drug-resistant strainsCombined effects of IPAD and acyclovir on HSV DNA synthesis. Vero cells infected with HSV wild types and HSV-1 DRs were treated with IPAD and ACV in various concentrations for 72 h and analyzed by PCR using specific primers for viral (HSV DNA polymerase) and cellular (β-actin) genes. A: HSV wild types. B: HSV-1 DRs.Back to article page