Problems of parasitic diseases of the digestive tract in tropical countries.
D000208:Acute Disease; D002908:Chronic Disease; D005247:Feeding Behavior; D006266:Health Education; D006373:Helminthiasis / Q000453:epidemiology; D006801:Humans; D007411:Intestinal Diseases, Parasitic / Q000150:complications / Q000453:epidemiology*; D011528:Protozoan Infections / Q000453:epidemiology; D014329:Tropical Climate; D014330:Tropical Medicine