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Mystery Photo- Spring 2025

A 1-month-old, female, Red Angus calf is presented for necropsy. The clinical history states that 2 calves out of 100 head have had diarrhea and died. The onset of diarrhea seems acute as a calf is sick one day and then is found dead the following day.
Upon necropsy, the calf has good body condition (5/9) with adequate visceral and subcutaneous adipose stores and moderate postmortem autolysis. The small intestinal contents are thin, watery, yellow, opaque liquid (Figure 1). The large intestinal contents are yellow, mucoid and semi-formed. No significant abnormalities are observed in the remaining organs of the thoracic and abdominal cavities and brain.
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