This is an outstanding survey describing medical drugs of plant origin, such as Echinacea edications, lentinan and mistletoe lectin, which have proven to be effective as immunostimulants. At a time when ever greater importance is being placed on preventive and alternative medicine, the study provides the reader with information on the physiological mechanisms of action and range of application of phytopreparations capable of inducing immunostimulatory effects when administered prophylactically or therapeutically. "Immunomodulatory Agents from Plants" addresses scientists in the pharmaceutical industry; physicians - general practitioners, internists and oncologists - who work with traditional immunostimulants; and also pharmacists wishing to improve customer service by gaining a firmer understanding of the science underlying and the clinical facts associated with drugs presently on the market.