慢性的な鼓脹症状を呈した黒毛和種雄牛における第3胃葉形成不全の1症例

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タイトル別名
  • Severe Hypoplasia of the Omasal Laminae in a Japanese Black Steer with Chronic Bloat-A Case Report
  • Internal medicine: Severe hypoplasia of the omasal laminae in a Japanese Black steer with chronic bloat

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抄録

An 11-month-old Japanese Black steer with chronic bloat underwent clinical and histological analyses. During the observation period, it showed normal appetite and fecal volume but persistent chronic bloat symptoms. Compared to controls, the steer's feces contained undigested large straws. Necropsy revealed normal rumen, reticulum, and abomasum but a small omasum. The rumen, reticulum, and abomasum mucosa was normal, with well-developed ruminal papillae. However, severe hypoplasia of the omasal laminae was observed along with hypoplasia reticular groove and ruminoreticular fold. The contents of the reticulum, omasum, and abomasums comprised undigested large sized hay particles. The omasum papillae showed no pathological abnormalities. This is a rare case of a steer with chronic bloat probably caused by severe hypoplasia of the omasal laminae.<br>

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