Abstract
Aim & Background: Peste des petits ruminants (PPR) is a notifiable, highly contagious viral transboundary disease of sheep and goats. In Ethiopia, the disease was clinically suspected to be present in 1977 and was confirmed late in 1991.
Methods: A retrospective study was conducted for describing PPR disease outbreak, related risk factors, and for assessment of PPR vaccination conducted in sheep and goats from January 2018 to December 2022 in South West Ethiopia People Regional State. Monthly disease outbreak and vaccination activity report data of all districts of the region were obtained from Mizan Regional Veterinary Laboratory Center. Relevant data entered into Microsoft Excel and organized by a pivot table. The spatial distribution of PPR outbreak occurrence in the region were displayed by map.
Results: The present study found that ten (22.72%) districts in the region reported twelve PPR outbreaks with a total of 528 cases and 212 deaths. The morbidity, mortality and case fatality rate of PPR outbreak varied from one district to the other, and it ranges 0.07% to 4.29%, 0 to 1.43%, and 0 to 75% respectively. High number of PPR outbreak (n=6, 50%) were recorded in the early rainy of the year. For prophylaxis and controlled of PPR outbreak occurrence a total of 883,772 sheep and goats were vaccinated.
Conclusion: Occurrence PPR outbreak increased in recent year in the region. Therefore, Commencement of mass vaccination in endemic area during the dry season and further research on diseases' epidemiology should be conducted.

Key words: PPR, Outbreak, temporal, Spatial, vaccination, South West Ethiopia region