<P> Some plants contain substances which are toxic in large doses, but have therapeutic properties in appropriate dosages . </P> <Ul> <Li> Foxglove contains cardiac glycosides . </Li> <Li> Poisonous hemlock (conium) has medicinal uses . </Li> </Ul> <Li> Foxglove contains cardiac glycosides . </Li> <Li> Poisonous hemlock (conium) has medicinal uses . </Li>

Currently the most common cause of foodborne illness is