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
专升本
Researchers say extra vitamin E fed to turkeys appears to help control infections from listeria (李氏杆菌). People who eat foods tha
Researchers say extra vitamin E fed to turkeys appears to help control infections from listeria (李氏杆菌). People who eat foods tha
admin
2018-04-13
56
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 alse 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 yitamin E did not get infected 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(淋巴球). 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(沙门氏菌) and campylobacter(弯曲杆菌).
Who took part in the research?
选项
A、Researchers from the University of Arkansas.
B、Researchers from Iowa State University.
C、Irene Wesley.
D、All the above.
答案
D
解析
事实细节题。参与此项研究的包括A、B、C三项。故选D。
转载请注明原文地址:https://kaotiyun.com/show/SSWC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Theyfailedtopasstheexamlasttime,Iregretted().
LloydSlocumwasunemployedfor18months,butlikehundredsofthousandsofAmericans,he’sworkingparttimethisholidayshop
Tostayeconomicallycompetitiveonaglobalscale,theUnitedStatesneeds8millionmorecollegegraduates【C1】______2020.That
EveryoneknowsthattheFrenchmenareromantic,theItaliansarefashionableandtheGermansareserious.Arethesejuststereot
BillGates,thebillionaireMicrosoftchairmanwithoutasingleearneduniversitydegree,isbyhissuccessraisingnewdoubtsa
Besidesbeginanendlesssourceofenergy,theuseofthesunhasotheradvantagesaswell.
Inrecentyears,moreandmoreforeignersareinvolvedintheteachingprogramsoftheUnitedStates.Boththeadvantagesandth
Inrecentyears,moreandmoreforeignersareinvolvedintheteachingprogramsoftheUnitedStates.Boththeadvantagesandth
Inrecentyears,moreandmoreforeignersareinvolvedintheteachingprogramsoftheUnitedStates.Boththeadvantagesandth
A、He’sserious.B、He’scareless.C、He’skind.D、He’spolite.A
随机试题
江泽民的“三个代表”重要思想提出于()
慢性粒细胞白血病最显著的体征是
关于喉癌的CT表现,下列描述正确的是
呕吐患者正确服用中药的方法为
试验室对试验检测的原始记录和报告除了有试验、计算、复核、负责人签字和试验日期外,还应加盖( )。
行动研究
两点论和重点论的关系是()。
第一次世界大战前夕,出现了两大对抗的帝国主义军事侵略集团——三国同盟和三国协约。从这两大对立集团的核心国就可看出,当时在帝国主义国家之间最为突出的矛盾应是()。
12,2,2,3,14,2,7,1,18,3,2,3,40,10,(),4
关于WWW服务,以下哪种说法是错误?
最新回复
(
0
)