[Human ecology and tropical medicine].

Tropical medicine's growing interest in social sciences has not remedied the neglect of some biological aspects related to human species polymorphism. These are adaptability to the environment and variability in time and space. Physical anthropology, when it is enlarged to include population genetics and the influence of the non-linear mode of thinking used in ecological sciences, may provide a good approach for solving problems related to development. Adaptability to a changing environment is partly cultural and partly biological. Medical standards used in developed countries may not be adequate in tropical regions. This paper reviews different areas in which human ecology can be useful to physicians, especially the study of the interactions between pathogens, human hosts, culture, and the physical environment.