This book is a guide to the diseases which are being disseminated around the world to a greater extent as the national and international mobility of the human race increases. The work covers diseases transmitted through soil, air, skin and mucus, as well as AIDS and venomous bites and stings. In addition, developments in immunology and molecular biology are also covered in this edition, along with new diagnostic procedures which make use of monoclonal antibiotics, DNA probes, more specific antigens, modern imaging techniques and genetically engineered vaccines. This revised edition has been updated and contains many new photographs.