Numerous economic, sociocultural, and health problems continue to impede the optimal progress of many millions of people in the developing countries in tropical and other geographic regions of the world. Thus, tropical medicine has many aspects including parasitology, bacteriology, and virology, environmental sanitation and hygiene, nutrition, pharmacology, immunology, agriculture, eco nomics, political science, anthropology, sociology, and behavioral sciences. Like the mythical Proteus, the individual dealing with tropical medicine must assume many roles. There is a growing recognition of...