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Using official epidemiological informations, authors study evolution of sleeping sickness epidemiological situation in seven OCCGE countries: Benin, Ivory Coast, Upper Volta, Mali, Niger, Senegal and Togo. 745 new cases were diagnosed in 1977 and more than 600 in 1978. We observe the extinction of historic foci in Niger and Senegal, the persistance of foci in Upper Volta and Mali and the reviviscence of foci in Benin, Ivory Coast and Togo. One of the prominent points of the present endemia is the importance of people migrations, especially between Ivory Coast and Upper Volta. It would be of major interest to enter upon an epidemiological study of this problem. An outline of situation in neighbouring countries is given. The important reviviscence of certain foci must lead to increase energies for medical surveys and vector control.
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