Tropical trials: the problems of research in the tropics

Eleven scientists who, like Herbert Gilles, have spent many years in the study of tropical disease, responded to an inquiry about the most problematic aspects of conducting intervention trials in the tropics. Areas of challenge or difficulty that figured most frequently in the replies were: (1) the proper interests, involvement and perceptions of the studied community; (2) maintaining a research team's standards and motivation over long periods; (3) good study design; (4) communications; and (5) the provision of adequate remuneration and incentives to local scientists. Other problems mentioned included the need to translate results into policy, the importance of a long-term view, the correct use of controls, the attitudes of donors, and the influences of national and local politics. Careful attention must be given to these aspects in the planning and conduct of international research.