Cause and Incidence · 未知有特定病因，或許與分娩應(yīng)激和高谷類日糧有關(guān)Specific cause is unknown but maybe associated stress of calving and high grain diets · 與牛的白血病和病毒性腐蝕疾病有關(guān)
Associated with bovine leucosis and viral erosive diseases · 見于犢牛從吃乳向固體日糧轉(zhuǎn)換期
Seen in calves at the time of transition from milk to solid diet · 見于成年奶牛和犢
Seen in adult dairy cows and calves 臨床癥狀
Clinical signs I型（無穿孔和無出血）Type 1 (non perforating and non bleeding) · 輕度瓣胃疼痛
Mild abdominal pain II型（出血）
Type 11 (bleeding) · 停食和無乳
Off feed and no milk · 輕度瓣胃疼痛
Mild abdominal pain · 黑類癥（少量的、黑色的、柏油樣糞便）
Melena (scant, dark, tarry stool · 貧血，可能死亡
Anemia and may die III型（穿孔）
Type 111 (perforating) · 局部腹膜炎和與鐵器病類似的癥狀
Local peritonitis and signs similar to hardware · 磨牙