RESUMO
In the present study, anti-Avian influenza virus H9N2 activity of aqueous extracts [5, 10, 15, 20, 25%] of Zingiber officinalis and Allium sativum was evaluated. Embryo-toxicity was evaluated by histopathological scoring of Chorio-allantoic membrane of chick embryos. Cytotoxicity of extracts was determined by MTT assay on Vero cells. Aqueous extract of ginger had antiviral activity at 10, 15, 20 and 25% while garlic had activity at 15, 20 and 25%. Histopathological scoring of chorio-allantoic membrane for aqueous extracts [5, 10, 15, 20, 25%] of ginger [0.66+/-0.57, 1.33+/-0.57, 1.66+/-0.57, 2.66+/-0.57, 3.66+/-0.57, respectively] and garlic [1.00+/-0.00, 1.33+/-0.57, 2.00+/-0.00, 2.33+/-0.57, 3.66+/-0.57, respectively] was concentration dependant. MTT assay revealed cytotoxicity of both plants was also concentration dependent. Extracts of ginger [5, 10, 15, 20, 25%] had lower cytotoxicity [71, 59, 28, 22, 0 % cell survival, respectively] as compared to garlic [61, 36. 20, 11, 3% cell survival, respectively]. Overall results revealed that concentration of aqueous extract of ginger [10%], showing antiviral activity against H[9]N2, was less toxic to vero cells [> 50% cell survival]. It is insinuated that ginger may have anti- Avian influenza virus H9N2 potential and its active compounds needs further investigations