| studies on the dynamics of transmission of onchocerciasis in a sudan-savanna area of north cameroon i. prevailing simulium vectors, their biting rates and age-composition at different distances from their breeding sites. | along the main water courses in the sparsely populated areas of the sous-préfecture of tcholliré, the vectors of onchocerciasis were mainly simulium damnosum s. str. and s. sirbanum, together with a small proportion of s. squamosum. over a period of one to three years, vector biting rates were measured at 23 fly-catching sites in the vicinities of nine villages with different endemicities of onchocerciasis. annual biting rates (abr) on man were estimated as 26,100-83,800 fly-bites per man per ye ... | 1987 | 3662664 |