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This episode of After the Abstract on Bovine Science with BCI reviews a 2026 study examining bovine leukemia virus (BLV) in cow-calf herds and its potential effects on reproduction, culling risk, and calf weaning weights. The hosts discuss findings showing that although BLV prevalence was very high in the studied herds, standard ELISA-positive status was not significantly associated with poorer pregnancy rates, increased culling, or lower weaning weights. They also explore proviral load measurements, noting that cows with the highest viral loads had slightly lower pregnancy rates, though the practical impact appeared small. Overall, the discussion emphasizes that BLV testing in otherwise healthy beef herds may have limited value for predicting production outcomes or guiding management decisions.
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By BCI Cattle Chat5
2222 ratings
This episode of After the Abstract on Bovine Science with BCI reviews a 2026 study examining bovine leukemia virus (BLV) in cow-calf herds and its potential effects on reproduction, culling risk, and calf weaning weights. The hosts discuss findings showing that although BLV prevalence was very high in the studied herds, standard ELISA-positive status was not significantly associated with poorer pregnancy rates, increased culling, or lower weaning weights. They also explore proviral load measurements, noting that cows with the highest viral loads had slightly lower pregnancy rates, though the practical impact appeared small. Overall, the discussion emphasizes that BLV testing in otherwise healthy beef herds may have limited value for predicting production outcomes or guiding management decisions.
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