Strobiloestrus sp. larvae in Merino sheep

Seventeen Merino sheep in the Springbokfontein region of the Orange Free State were found to harbour Strobiloestrus sp. larvae in cutaneous nodules in the flank and rump regions of their bodies. The life cycle, however, could apparently not be completed in the sheep as the larvae left the nodules without developing further. Mountain reedbuck, running with the sheep, were also infested and were a probable source of infestation for the sheep.