呼吸障害と肺炎で発育不良に陥っていた子牛が生後2か月で斃死してしまった。治療経過があまりにも芳しくなかったために剖検を行い、肋骨の骨折を確認した。
Figure 1. Left ribcage from which skin and muscles were removed. The 4th to 6th ribs were obviously fractured.
Figure 2. Adhesion between left ribs and lung was observed.
Figure 3. Severe pneumonia was observed. Three points are pointed out as the fractured lesions of 4th to 6th ribs.
Figure 4. There were three processes inside ribcage where fractured ribs were observed.
文献にあるように広域に骨折し、肺を左右から圧迫され、重度の肺炎を併発していた。文献で報告されていることを目の当たりにしてとても感銘を受けた。
娩出時肋骨骨折に起因した気管狭窄による呼吸不全子牛の8症例