Fig. 3From: Onchocerca volvulus transmission in the Mbam valley of Cameroon following 16 years of annual community-directed treatment with ivermectin, and the description of a new cytotype of Simulium squamosumHead and thorax of late-instar larvae showing a S. squamosum E2, and b S. mengense with arrow pointing to tuft of hair-like scales on the anterior dorsum of the thoraxBack to article page