CRITERION FOR INCLUSION IN ONCHOCERCIASIS CONTROL PROGRAMS BASED ON IVERMECTIN DISTRIBUTION

Data on onchocercal lymphatic and skin lesions from 45 communities loc ated in the West African savanna were analysed to determine if the cri terion for inclusion in ivermectin mass treatment based on risk of onc hocercal blindness needs to be modified. Only 16 cases of elephantiasi s were reported among 10 108 people examined. Other lymphatic lesions were almost exclusively found in people older than 30 years living in villages at risk of onchocercal blindness. Permanent skin lesions also affected older people and were 3 times more frequent in villages at r isk of onchocercal blindness. Papular rash and pruritus affected young er people, No evidence was, therefore, found to change the criterion b ased on risk of onchocercal blindness presently in use in savanna area s.