Crude extracts obtained from leaves of Cedrela fubiJlora (CT) (Meliaceae family) show antiviral and virucidal effects against several viruses. Herpes simplex, pseudorabies and vesicular stomatitis viruses were extremely susceptible and a reduction of 3-5 log in infectivity occurred after 15 min of direct incubation with the plant extract. By contrast, poliovirus and the Tacaribe arenavirus are inhibited intracellularly. The inhibitory action is dose dependent and no cytotoxic effects were detected on Vero cells after 2 days of CT treatment.
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