This fully updated third edition of a classic book, widely cited as the most important and useful volume for health engineering and disease prevention, describes infectious diseases in tropical and developing countries, and the measures that may be used effectively against them. The infections described include the diarrheal diseases, the common gut worms, guinea worm, schistosomiasis, malaria, bancroftian filariasis, and other mosquito borne infections. The environmental interventions that receive most attention are domestic water supplies and improved excreta disposal. Appropriate technology for these interventions, and also their impact on infectious diseases are documented in detail. This edition includes new sections on arsenic in groundwater supplies and arsenic removal technologies as well as new material in most chapters, including information on water supplies in developing countries and surface water drainage.