A STUDY OF WHITE DIARRHEA CAUSED BY DAM'S MILK IN JAPANESE BLACK CALVES.

对日本黑犊牛母乳引起的白色腹泻的研究。

• 批准号: 10839002
• 负责人: OKADA Keiji
• 金额: $ 2.05万
• 依托单位: IWATE UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10839002/
• 关键词: JAPANESE BLACK COW; CALF; WHITE DIARRHEA; MOTHER' S MILK; FATTY ACCID; 子牛白痢; 母乳性白痢; 黒毛和種子牛

We performed a reappearance test on the occurrence of white diarrhea in calves after an additional supply of corn silage was given to cows fed with a low starch diet , which was surmised to be one of the causes of the development of white diarrhea in calves. We selected five Japanese Black cows immediately after delivery and their offspring, and followed the gastric juices, blood, and milk of cows and blood and feces of calves up until the development of white diarrhea, measuring the amounts of diet intake and of lactation each day. All the offspring of the selected cows developed white diarrhea 5-7 days after the corn silage began to be fed to the cows. A slight change was found in the feces of calves 1-3 days after the start of corn silage feed. If we consider this as first day of antecedent sign occurrence, the number of large- and medium-sized protozoan in the rumen juice increased around that day. The concentration of Mg, Ca, and long-chain saturated fatty acids in milk increased … More and the pH level and the constitution of fatty acids in milk became unstable on the day this antecedent sign occurred. Simultaneously, an increase in TG in blood began in the calves, which seemed to be caused by retention of milk contents due to formation of fatty acidic salts in the calves' intestinal canals. The day before the onset of white diarrhea, the number of large- and medium-sized protozoa in the rumen of the cows began to decrease while small-sized protozoa increased markedly. The serum levels of phospholipids (PL) and BUN increased in accordance with this. On the day of white diarrhea onset, dramatic temporary changes occurred in the contents of the blood (TG, PL, Glucose, and BUN) and milk (fat content, fatty acid constitution, and pH) of the cows, because of a transient increase in digestion and absorption by a large amount of microorganisms. It was presumed that white diarrhea occurred in calves that had ingested this milk, excreting it as lienteric fatty stools.These findings showed that a change in the condition of the rumen caused by the trigger of feeding corn silage induces a change in the fat of cow blood. Thus calves that ingest milk from such cows develop what is known as "white diarrhea caused by dam's milk calves." Less

我们对饲喂低淀粉日粮的奶牛额外补充玉米青贮饲料后发生的小牛白色腹泻进行了重现试验，推测这是小牛发生白色腹泻的原因之一。我们选择了5头分娩后立即出生的日本黑牛及其后代，并跟踪了母牛的胃液、血液和乳汁以及小牛的血液和粪便，直到发生白色腹泻，测量每天的饮食摄入量和泌乳量。在开始给奶牛饲喂玉米青贮饲料后5-7天，所选奶牛的所有后代均出现白色腹泻。开始饲喂玉米青贮饲料后1-3天，发现犊牛粪便略有变化。如果我们认为这是第一天的先行迹象出现，大型和中型原生动物在瘤胃液中的数量增加，当天左右。牛奶中镁、钙和长链饱和脂肪酸的浓度增加 ...更多信息 在这一先兆发生当天，牛奶中的pH值和脂肪酸组成变得不稳定。同时，小牛血液中的TG开始增加，这似乎是由于小牛肠道中脂肪酸盐的形成导致的乳内容物滞留引起的。在白色腹泻发病前一天，奶牛瘤胃内大中型原虫数量开始减少，而小型原虫数量明显增加。磷脂（PL）和BUN的血清水平也相应升高。在白色腹泻发作当天，由于大量微生物的消化和吸收短暂增加，奶牛的血液（TG、PL、葡萄糖和BUN）和乳汁（脂肪含量、脂肪酸构成和pH）的含量发生了急剧的暂时变化。据推测，摄入这种牛奶的小牛会发生白色腹泻，并以脂肪性粪便的形式排出。这些发现表明，饲喂玉米青贮饲料引起的瘤胃状况变化会引起奶牛血液脂肪的变化。因此，小牛吃了这些奶牛的奶，就会患上所谓的“母牛产奶引起的白色腹泻”。“减