| onchocerciasis transmission levels and simulium damnosum complex biting activity at riverside and rice field sites in sierra leone. | biting densities of the simulium damnosum theobald complex of blackflies and their levels of parasitism by onchocerca volvulus (leuckart) were compared at two ecologically contrasted sites in the southern province of sierre leone, west africa: by the tabe riverside close to gbaiima village where onchocerciasis is hyperendemic (63.1% positive skin-snips) and in open rice fields 2 km from the mesoendemic (54.9%) village of senehun. using a combination of morphometric and enzyme electrophoresis tec ... | 1988 | 2980195 |