US: Lung consolidation effect on beef and dairy calves

게시됨 2024년 5월 14일

Tridge 요약

A study conducted by Penn State University, led by I.L.B. Fernandes, investigated the effect of lung consolidation at weaning on the average daily gain (ADG) of 145 beef × Holstein calves. The research, presented at the 2024 Tri-State Dairy Conference, included calves from two dairies raised in three cohorts, with health assessments and thoracic ultrasonography scans to evaluate lung consolidation. The study found a significant interaction between lung consolidation severity and the period post-weaning, indicating that while there was no difference in ADG in the immediate post-weaning period, calves with more severe lung consolidation experienced slower growth in the following period. However, by 238 days of age, the growth deficit had been compensated, suggesting that lung consolidation at weaning has minimal long-term impact on calf growth.

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원본 콘텐츠

A recent study evaluated the impact of lung consolidation at weaning on average daily gain (ADG) of 145 beef × Holstein calves. The study was done by I.L.B. Fernandes and fellow students at Penn State University; the results were presented at the 2024 Tri-State Dairy Conference. Calves were sourced from two dairies and raised in three cohorts. Calf health (diarrhea, bovine respiratory disease) was assessed after arrival (1 to 4 days of age), at 61 ± 14 day (4 days post-weaning), 83 ± 21 days, and 238 ± 21 days. Calves received a thoracic ultrasonography scan (TUS) at period 1 to assess for lung consolidation (TUS+ ≥ 1 cm in one lobe), and lung consolidation severity (LCS; none, 1 to 2 cm, or 3 cm). Calves were fed milk replacer (0.84 kg/day) and had ad-lib access to starter and water in buckets. At 4 ± 2 day post-weaning, calves were moved to a separate rearing facility. Calf ADG was calculated into periods: arrival weight – weaning weight /day (period 1), weaning weight – 83 day ...

출처: The Cattle Site