The specific virus antigen was detected in the liver and spleen samples of Euchoreutes naso, Dipus sagitta and Brachiones przewalskii, the positive rates were 6.3%, 5.0% and 16.7%respectively.

• 用反向血凝试验在长耳跳鼠、三趾跳鼠和短耳跳鼠的肝、脾标本中检出病毒抗原；阳性率各为6.；3%25；5