A total of 852 sera samples, were collected from sheep and goats periodically at 3 wecks intervals for a period of one year. The sera samples were examiend by serum neutralization test (SNT) for antibodies to PPR virus during the four seasons of the year. The results revealed that, in winter 52.5%, 61.5% and 15.9% of mixed breed sheep, Barki sheep and goats respectively have antibodies for PPR virus. In Spring the positive percentages were ,10%, 44.75% and 19.31%. In summer Season they were, 30%, 25% and 4.54% and in Autumn the percentages were 18.75%, 31.66%, and 7.57% for the two sheep breeds and goats respectively. It could be concluded that PPR virus neutralizing antibodies prevail in winter and Spring months than in Summer and Autumn months.