Antiviral activity of medicinal plants extracts against foodborne norovirus

Medicinal plant extracts (MPE) have a broad antimicrobial activity, including antiviral effects. In our study, eleven dry extract of ten different medicinal plant prepared with two solvents (5%, dimethyl sulfoxide (DMSO) and 30% ethanol in 5% DMSO) in different concentrations have been examined for anti-noroviral activity. The reduction of norovirus > 1 log10 genome equivalents (GE) has been obtained with 1 mg/mL of Aronia melanocarpa leaf extract (AMLE), dried wine Prokupac (WPE) and Hypericum perforatum extract (HyPE). Some of MPE i.e. HyPE, Aronia melanocarpa fruit extract (AMFE) and Punica granatum (PPE) showed better activity when dissolved in 30% ethanol with 5% DMSO. All results of anti-noroviral activity of tested MPE which achieve lt 0.5 log10 GE are considered as not effective.