[Epidemiological feature of malaria in the Ivory Coast and Upper Volta area]

Several steps of the malarial epidemiological chain depend upon the environment. In West Africa, environment had no constant patterns neither in space and nor even in time. Its major discontinuities introduce disparities, at various levels, in the conditions met by the parasite for its transmission. In return, these conditions induced disparities in the immunological resistance of people. The malarial epidemiological feature is the result of the discontinuities of the environment in the Ivory Coast and Upper Volta area of the resulting epidemiological disparities. It accounts for the various possible aspects of the disease among the human populations. Malarial epidemiological feature is not only useful to understand the present situation but it is a guide of great value for any action adjusted to the needs of this area. It is also a good way to appreciate the risks resulting of the evolutions, either spontaneous or voluntary, of the natural or human environment.