This study was carried out on 180 pregnant ewes located at Ras Sedr research stationdesert research center, from 2003 to 2005.Twenty five cases of abortion were recorded and examined serologically by complement fixation test (CFT).17 (68%) out of these 25, showed positive results against Chlamydophila abortus and 3 (15%) out of 20 apparently healthy pregnant ewes were serologically positive.Due to...