Tropical enteritis: nutritional consequences and connections with the riddle of cholera.

One of the important consequences of the infection-nutrition interaction is mediated by malabsorption associated with chronic inflammation in the intestine, enteritis. Studies made possible after development of the peroral intestinal biopsy technique in the 1950s indicated the wide prevalence of enteropathy, particularly in tropical developing countries with poor levels of sanitation. Some consider this so-called subclinical tropical malabsorption to be the base of an iceberg, whose tip is tropical sprue, a severe form of malabsorption leading to nutritional deficiency that had been reported in colonial expatriates in tropical countries for 200 y. Some of the first demonstrations of the prevalence of tropical enteritis in Asia were made in quest of the pathologic lesion of cholera, and further examination of the water and electrolyte, as well as nutrient, malabsorption in cholera led serendipitously to the discovery of the oral rehydration solution for the treatment of diarrheal disease.