Bovine ephemeral fever (BEF) is an endemic disease in Egypt, where several epidemics were occurred in the last 15 years. So, this study was aimed to discuss some epidemiological and clinical aspects related to the disease in Sakha station, Kafr El-Sheik, Egypt. Observational studies in 2004 were compared to outbreak, 2000 in the same farm.Clinical signs varied from animal to animal but collectively clinically infected animals showed high fever, anorexia, ruminal atony, depression, shivering, excessive salivation, respiratory distress, ataxia, lymph node enlargement and lameness with stiffness in one or more limbs with recumbency in some animals. The morbidity rate was higher (47.62%) in outbreak, 2000 than that recorded in outbreak, 2004 (23.77%).Moreover, in outbreak, 2000, the mortality rate was 1.35% and the case fatality rate was 2.84% whereas the recovery rate was 100% in outbreak, 2004. Concerning the disease seasonality, the two studied outbreaks occurred in summer months. The infection rate was greater in female than male animals in both outbreaks.  The incidence of the disease was lower in young animals than that in adult ones. Moreover, the disease was more severe in adult heavy weighted animals.