The distribution of dracunculiasis in Nigeria: a preliminary study.

This paper presents a preliminary assessment of the distribution and endemicity of dracunculiasis in Nigeria. The disease is found in all 19 States of the Federation and in the Federal Capital Territory of Abuja. It occurs in areas with a dry season of more than nine months as well as those with a dry season of less than four months; the seasonal distribution of rainfall influences the peak period of disease transmission and patency. Altogether, an estimated 2.5 million cases occur every year, and at least 30% of the entire rural population is at risk from the infection. The widespread distribution of dracunculiasis throughout the country indicates the need for a national control campaign and a sustained programme of international cooperation.