首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Researchers say extra vitamin E fed to turkeys appears to help control infections from listeria(李氏杆菌). People who eat foods that
Researchers say extra vitamin E fed to turkeys appears to help control infections from listeria(李氏杆菌). People who eat foods that
admin
2014-12-31
65
问题
Researchers say extra vitamin E fed to turkeys appears to help control infections from listeria(李氏杆菌). People who eat foods that contain this bacteria can get listeriosis(李氏杆菌病).
This disease is especially dangerous to pregnant women, newborn babies and people with weakened defenses. The United States has more than two thousand cases of listeriosis each year and five hundred people die of it. Some cases have been linked to poultry(家禽)products that have not been cooked enough. The researchers found that vitamin E improved the ability of turkeys to fight the growth of listeria. The findings could help other meat industries as well.
Irene Wesley led the study for the United States Department of Agriculture. Researchers from Iowa State University and the University of Arkansas also took part. The findings appeared in Poultry Science magazine earlier this year.
Vitamin E is found in oils from vegetables, grains and animals. It helps protect some kinds of fatty acids that are necessary for healthy cells. Vitamin E helps prevent oxygen from combining with these fats to cause damage to cells.
Turkeys need vitamin E for normal development. But the scientists added extra amounts to the diet of two groups of turkeys. The birds were one day old. Two other groups were not given any extra vitamin E. After six weeks, the researchers infected all the young turkeys with listeria. The scientists then tested the birds for the presence of the bacteria over a period of time.
The results showed that the birds that received extra vitamin E did not get infected as often as the others. The birds that received the largest amount had the lowest number of infections.
The scientists say vitamin E has a similar effect on chickens. They say chickens and turkeys that receive added vitamin E develop more infection-fighting cells called lymphocytes. The increased number of these cells appears to also help protect against other diseases that can be carried by birds.
The scientists continue tests. They want to see if vitamin E can stop other dangerous bacteria that can enter food. They are testing it against salmonella and Campylobacter.
The disease caused by listeria______.
选项
A、is linked to poultry products cooked enough
B、is especially dangerous not only to newborn babies but also to people with weakened defenses
C、is not dangerous
D、is dangerous only to pregnant women and newborn babies
答案
B
解析
细节题。根据短文第二段第一句This disease is especially dangerous topregnant women,newborn babies and people with weakened defenses.可知,李氏杆菌病对孕妇、新生婴儿以及抵抗力差的人都有很大的危害。故答案为B。
转载请注明原文地址:https://kaotiyun.com/show/kRq7777K
0
大学英语四级
相关试题推荐
Gettingagoodnight’ssleephaslongbeenknowntoconsolidatetheday’smemories,movingthemfromshort-termstorageintolon
A、Americansdon’tliketomakefriends.B、Americaisasocietyfilledwithcrimes.C、Americansalwayscarryweaponswiththem.D
A、Becausetheyareoffendedbystrangers.B、Becausetheythinkstrangersarecriminals.C、Becausetheirinterestsarethreatened
A、Bossandemployee.B、Strangers.C、Friends.D、Teacherandstudent.C推理判断题。由对话双方彼此互知姓名以及他们对话间的随意性可知,二者是朋友关系。
A、Shemissesschooloften.B、Shehatescomingtoschool.C、Sheisagoodstudent.D、Shewasn’treallysick.C观点态度题。女士说Jennifer今天
Unlikeothercountrieswhereitiscommontoseetwowomenortwomenholdinghands,suchbehaviorisfrowneduponinWesternco
Allovertheworld,yourchancesofsuccessinschoolandlifedependmoreonyourfamilycircumstancesthanonanyotherfactor
TodayAmericanparentsarefindingthemselvesinadilemmaabouthowtodealwithteenagedrinking,aserioussocialproblem.A
TodayAmericanparentsarefindingthemselvesinadilemmaabouthowtodealwithteenagedrinking,aserioussocialproblem.A
TodayAmericanparentsarefindingthemselvesinadilemmaabouthowtodealwithteenagedrinking,aserioussocialproblem.A
随机试题
Americanssufferfromanoverdoseofwork.Regardless【C1】______whotheyareorwhattheydo,Americansspend【C2】______timeatwo
对侵蚀性葡萄胎肺转移的患者的护理正确的是
大量咯血指的是A.每日咯血量100mlB.每日咯血量在200mlC.每日咯血量在300mlD.每日咯血量在500ml以上E.一次咯血量100ml
某国有企业的工程项目,建设单位通过招标选择一家具有相应资质的造价事务所承担施工招标代理和施工阶段造价控制工作,并在中标通知书发出后的第45天,与该事务所签订委托合同。之后双方又另行签订一份酬金比中标价低10%的协议。在施工公开招标中,业主代表为了更好地控
某公司其产品销售不畅,经认真分析后,发现问题主要出在营销环节上,尤其是市场开拓方面。企业计划招聘50人,改革分配制度。请根据以上资料,回答下列问题。进行销售人员面试时,应注意的问题有()。
某商场采用毛利率法进行核算,2017年3月酒类商品的毛利率为30%,结存库存商品余额为1500230元。2017年4月购进酒类商品成本522300元,销售酒类商品的收入为555220元。则月末结存酒类商品的实际成本为()元。
甲公司购买乙公司股权业务如下:(1)2×17年3月2日与乙公司的控股股东A公司(非关联方)签订股权转让协议,协议规定甲公司应以乙公司3月1日经评估确认的净资产9625万元为基础定向增发本公司普通股股票给A公司以取得其所持有乙公司80%的股权;3月10日甲公
材料:以下是某高中生物教师的授课过程。教学内容:《稳态与环境》第5章《生态系统及其稳定性》第5节《生态系统的稳定性》教学过程:过程一:设问:“人类能否在生物圈外建造一个适于人类长期生活的生态
最早明确提出“教学教育性”原理的教育家是()
国有企业在我国国民经济和经济体制改革中的地位。如何理解现代产权制度是“构建现代企业制度的重要基础”?
最新回复
(
0
)