Antiviral Effect Assay of Aqueous Extract of Echium Amoenum-L against HSV-1

Background: medicinal plants have been used for different diseases in past. there is an increasing need for substances with antiviral activity since the treatment of viral infections with the available antiviral drugs often leads to the problem of viral resistance. therefore in the present study echium amoenum l plant with ethnomedical background was screened for antiviral activity against hsv-1 in different times. materials and methods: flower part of echium amoenum l plant collected from iran was extracted with different methods to obtain crude aqueous extract. this extract was screened for its cytotoxicity against hep ii cell line by cpe assay. antiviral properties of the plant extract were determined by cytopathic effect inhibition assay.results: echium amoenum l extract exhibited significant antiviral activity at non toxic concentrations to the cell line used. findings indicated that plant extract has the most antiviral activity when it used an hour after virus inoculation.conclusion: echium amoenum l plant had not toxic effect at highest concentrations to the cell lines used and showed the most antiviral activity when it used an hour after virus inoculation. further research is needed to elucidate the active constituents of this plant which may be useful in the development of new and effective antiviral agents.