Phylogenetic presentation of medicinal plants and a chemotaxonomical rationale of antiviral, antibacterial, and antifungal action. Discusses chemical structure-activity relationship, pharmacokinetics, and oral bioavailability of antimicrobial principles Introduces the molecular mechanism of natural products on viruses, bacteria, and fungi. Contains a selection of botanical plates and useful bibliographic references A useful research tool for postgraduates, academics, and the pharmaceutical, herbal, or nutrition industries.