开花后的伤口特征:第I部分 - - 腐蚀剂量和毛发存在的影响
Alycia M Drwencke1, Sarah J J Adcock2, Cassandra B Tucker3
1Center for Animal Welfare, Department of Animal Science, University of California, Davis, CA 95616; Animal Behavior Graduate Group, University of California, Davis, CA 95616.
Journal of dairy science
|August 8, 2025
概括
用腐蚀剂糊涂乳牛的散发涉及不同的糊剂量和剃须角芽. 结果显示,剂量和剃须会影响伤口愈合和疗效,有些方法会导致更多的疼痛和再生.
科学领域:
- 兽医医学 兽医医学 兽医医学
- 动物科学动物科学
- 农业科学 农业科学
背景情况:
- 乳牛犊的散花是一种常见的,痛苦的程序,方法各不相同.
- 现有的研究缺乏对不同糊应用的比较数据.
- 变化包括糊的数量以及角茎毛是否被剃去.
研究的目的:
- 为了评估粉剂量和角芽毛发剃须对散发结果的影响.
- 评估对小腿乱,伤口特征,灵敏度,愈合时间和角子再生的影响.
主要方法:
- 雌性荷尔斯坦小牛 (n=24-25/治疗) 在剃光或未剃光的角头上接受了0.2或0.3毫升的性糊.
- 牛犊在3天大时在发芽之前接受局部麻醉和全身止痛.
- 伤口组织,灵敏度 (机械感知值) 和再生都被监测每周,直到愈合.
主要成果:
- 剃光的角芽增加了牛犊的粉的摩擦;0.2毫升未剃光的风险最低 (12%),而0.2和0.3毫升剃光的风险最高 (58%).
- 伤口直径因剂量和剃须而异;0.2毫升未剃须的伤口比0.3毫升剃须小6毫米.
- 愈合时间为14.3-18.0周的再上皮化和15.9-19.4周的完全愈合,0.2毫升未剃毛愈合最快,0.3毫升剃毛最慢.
结论:
- 散花膏的剂量和毛发的存在显著影响小牛的反应,伤口形状和程序的有效性.
- 0.2毫升的未剃须面料导致伤口更小,愈合更快,但角子再生率更高 (21%) 需要重新处理 (8%).
- 0.3毫升的剃须膏导致伤口摩擦最多,愈合速度最慢,而0.2毫升的剃须和0.3毫升的未剃须导致了相似的长期损伤 (平均每小时). 4.4个月的治愈时间).
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