Endemicity and striking manifestations of onchocerciasis in Shao, Kwara State, Nigeria.

A house-to-house screening exercise was carried out in Shao, Kwara State, Nigeria, to determine the status of onchocerciasis in the town. The results of skin snips taken from 2018 subjects revealed that, with an overall infection rate of 54.6%, the community is mesoendemic for river blindness. The prevalence and intensity of the infection were significantly higher for adults than for children, for males than for females and for farmers than for other occupational groups (P less than 0.01). The severity and frequency of occurrence of striking manifestations of onchocerciasis, including blindness, hernias, hanging groins, 'leopard skin' and scrotal elephantiasis, strongly suggest that the community had a history of long-standing onchocerciasis. The desirability for the implementation of a nation-wide control programme in Nigeria to complement the ongoing control efforts in the Volta River Basin Areas, is highlighted.