[Identifying areas of epidemiological stratification in an onchocerciasis focus in Yanomami territory, Roraima, Brazil].

In this paper, aimed at suitable planning, analysis, and follow-up of treatment, control, and eradication in a human onchocerciasis program, were studied 27 geographic areas and examined 3,974 inhabitants. Four epidemiological areas with different prevalences were identified and stratified.