Bovine Ephemeral Fever (BEF) outbroken late in 1983 and in the Spring of 1984 was studied. Two months after the disappearance of the first epidemic, the disease outbroke again at the same focus. Chiayi, and rapidly spread to whole island. The disease affected 5,650 heads (20.1%) in the total dairy cattle population of 28,117 in Taiwan in 1984. A number of 340 heads (6.0%) out of 5,650 either died or were culled and 189 aborted. All the result, the dairy farmers sustained a heavy loss from the death of animals, abortions, lower milk yield, slowed growth rate.
The commonest clinical signs seen were acute pyrexia, tachypnea, anorexia, depression, excessive salivation and nasal discharges, and lameness. Grossly, trachea showed severe congestions and hemorrhages, and the lungs, "'3rked emphysema. Histopathologically, dilatation of alveoli' was very eminent.
During the study, the authors encountered an instance of clinical case of bovine ephemeral fever in deer (Cereus nippon Taiouanus). The symptoms were similar to that of BEF in cattle.