Five toilet-linked biogas digesters working with in the range of ambient temperaturernwere assessed to detennine the presence of intestinal parasites in the effiuent slurryrnconsidering the four seasons. These were in Addis Ababa (at Asko, Lidcta and BisrateGebriel),rnat Fitche and Awassa. Retention days were dctcnnined through recording thernflow rate of influent slunies. Eggs of intestinal parasites of the influent and effluentrnslurry from the di gesters were identified by taking samples when the influent channeledrninto the digester at the mixing pit and effiueDt slurry away through the reservoir forrneach season.