| 英文描述 | In sheep, ulcers are most common in feedlot lambs 3-6 mos. old. Most calves have ulcers at weaning age, but rarely show signs. Seen sporadically in adult cattle, usually in association with abomasal lymphosarcoma or in cows with concurrent postparturient diseases. Dx bleeding ulcers by signs associated with occult blood in the stool. With perforating ulcers, abdominocentesis should show signs of an inflammatory process. Onset of signs may be very rapid if there is development of acute diffuse peritonitis or a more chronic local peritonitis confined to the omental bursa or a periabomasal abscess can develop. In cows perforated ulcers are probably more common in the early postpartum period and most affected cows have concurrent diseases such as metritis, mastitis or ketosis. Most of these cows have occult blood in the stool. Dx confirmed at surgery. |
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