Atacora Province has been for a long time a focus of human trypanosomiasis in the People's Republic of Benin. If the prevalence has appreciably decreased in the 1960s on account of the experienced methods of tracking down and a sustained supervision, it is easy to establish and to fear today the waking and even the extension of the historic focus formerly called "Foyer Atacora". Since 1974, new patients in second period of the infection are tracked down each year; they particularly come from the localities of Tanguieta and Materi. This suggests that sleeping sickness still persists in the North Country; that is the reason why it appears interesting to evaluate the present state of African human trypanosomiasis in this region of Benin; this appraisal has been tried from a clinic and serologic survey during May 1986 in the the population of four localities of this province: N'Dahonta, Porga Forêt, Porga Village and Dassari.
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