[文章]推荐美国科学家的新发现STUDYING ABOUT INFECTION AND COW FROM A.R.S.

abigileUID: 153788

Treating Stress in Animals

people often experience stree as a result of events in their lives.Stress is a physical condition that results from real or expected problems.People may experience stress when they lose a job or feel threatened.Common signs include increased heart rate,higher blood pressure and muscle tension.

American agriculture experts say farm agimals also may experience stree.Animals may experience stress after giving birth or for other reasons.They say stress may affect meat quality,milk production and the health of farm animals.

Experts say stress in animals is more difficult to identify.Farmers can look for signs such as lower than expected body weight and increased risk of disease.

Ted Elsasser is a scientist at the United States Agricultural Research Service.He is studying a possible sign of stress in animals.He says changed proteins called nitrated proteins may serve as an early warning system fro the problem.

Currently,farmers use antibiotics to treat stress in animals.However,repeated use of use antibiotics can lead to bacteria that resist the frugs.

Mister Elsasser is studying another method.He found that Vitamin E may protect farm animals against the harmful effects of stress.In an experiment,he gave Vitamin E to six young cows.Then he injected the animals with a harmful substance taken from the cell walls of bacteria.This toxin causes the defense system of the animals to react as if an indrction wre present.The scientist injected six other calves with only the toxin.Four other cows did not receive the toxiin or the Vitamin E

Then Mister Elsasser studied the animals.All of the animals that received the toxin had lower levels of a natural growth substance in their liver and blood,compared with the untreated calves.However the calves that werer given VitaminE and the toxin had higher levles of the growth factor than those that received only the toxin.The calves given vitamin E also recovered more quickly from the effects of the harmful substance.

Mister Elsasser says using Vitain E helps support growth rates and may prevent some infections.He says being able to prevent infections linked to stress could lead to lower medical costs and healthier farm animals.

中文：
人们经常因为生活中的某些事而导致患上紧张症。紧张症是人们面对真实的或预想的困难而引起的身体状态。人们可能会在失业或感到恐惧时患紧张症，就症状总的来说，包括心跳加速，血压升高和肌肉紧张。

美国农业专家认为农畜也可能会患紧张症。动物可能会在出生后或因为其他原因感到紧张。专家认为紧张会影响动物肉质，乳制品和农畜的健康。

专家认为要辨别动物的紧张症更困难。农民们能从诸如动物的体重比预计重量更低或生病风险提高等因素中找到迹象。
TED ELASSER 是美国农业研究机构的科学家。他正在研究动物患有紧张症的迹象。他认为将蛋白质改为硝酸钾蛋白质可能会作用于预警系统。

目前，农民们使用抗生素治疗动物紧张症。然而，重复使用抗生素会导致细菌的抗病毒能力增强。Mister Elsasser正在研究使用其他方式。他发现维他命E可以保护农畜抵抗紧张的影响。在一个实验中，他给六只小母牛服用维他命E。然后，给它们注射带病毒细胞的有害物质。毒素仿佛传染病的表现，导致动物的防御系统起反应。科学家在另外六只小牛体内仅注射毒素。而有四只母牛没有注射毒素或维他命E。

然后，Mister Elsasser研究这些动物。所有注射毒素的动物比没有治疗过的小牛的肝脏和血液内的健康物质生长程度更差。然而，得到维他命E的小牛比仅注射毒素的小牛的生长程度更高。有维他命E的小牛所受到害物质的影响也消失得更快。

Mister Elsasser研究使用维他命E帮助提高生长率和阻止一些传染病。他的研究能够阻止传染病相互传染而产生压力，可以使医药成本更低以及农畜更健康。

——MMD好不容易贴上来——
~~本文译文仅作参考，转载至《论维他命E在牛体内的作用》，内容以英文为主~~