Preponderance of Musca spp. and their accessibility to goat feeds and faeces containing Eimeria oocysts prompted an investigation into the role of these flies in the dissemination and/or transmission of goat eoccidiosis. Seventy per cent of the dissected 300 Musca spp. caught in the goat pens where faeces containing Eimeria oocysts were widely scattered, possessed the oocysts in their digestive organs, with the highest number found in the gut. When Musca spp. were induced to feed on faecal solution containing Eimeria oocysts, oocysts were recovered from the flies through regurgitation during subsequent feeding on glucose solution. At low concentrations of 300 and 500 oocysts per g faeces, substantial numbers of oocysts were recovered from the flies only up to 1/2 hr after feeding on the infected faeces; at higher concentrations, oocysts were recovered up to 2 hr. Results of other experiments also showed that the nurriber of flies in which oocysts were found and the number of oocysts recovered were highest when the flies were dissected immediately and 1/2 hr after exposure to infected faeces. The circumstances under which Musca spp, could sustain eoccidiosis and coccidiosis in a goat herd are discussed.