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
43
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 cells called lymphocytes______.
选项
A、will help protect against only the disease caused by listeria
B、help protect against diseases that can be carried by birds
C、will not help protect against other diseases
D、help protect against other diseases that can be carried by turkeys
答案
B
解析
细节题。根据短文倒数第二段最后两句…infection—fighting cells calledlymphocytes...appears to also help protect against other diseases that can be carried bybirds.可知这种叫lymphocytes的细胞可以防止鸟类身体携带的疾病的危害。故答案为B。
转载请注明原文地址:https://kaotiyun.com/show/CRq7777K
0
大学英语四级
相关试题推荐
Americanshavelonger,butnotnecessarilyhealthierlivesduetohighratesofpreventablechronicdisease,accordingtoanann
Americanshavelonger,butnotnecessarilyhealthierlivesduetohighratesofpreventablechronicdisease,accordingtoanann
Two-thirdsofAmericansareoverweightorobese.Developingcountriesarecatchingup.InChinanearly30%ofadultsaretoowid
A、Americansdon’tliketomakefriends.B、Americaisasocietyfilledwithcrimes.C、Americansalwayscarryweaponswiththem.D
A、Shemissesschooloften.B、Shehatescomingtoschool.C、Sheisagoodstudent.D、Shewasn’treallysick.C观点态度题。女士说Jennifer今天
Holdingontothebeliefthatchildrenwillshedtheir"babyfat"astheygetoldermayallowthechildhoodobesityepidemiclas
Unlikeothercountrieswhereitiscommontoseetwowomenortwomenholdinghands,suchbehaviorisfrowneduponinWesternco
A、Collectivism.B、Equality.C、Socialgroup.D、Individualism.D短文提到,美国人想起自由时,经常想到的是个人主义,故直接选D。
ThecountriesthathavelefttheUnitedStatesbehindinmathandscienceeducationhaveonethingincommon:Theyofferthesam
Sleepiscrucialforgoodhealth.Ithelpsmemoryand【B1】______,keepsyoufit,strengthensyourimmunesystem,fightsinflammat
随机试题
巴宾斯基征阳性见于
中枢性瘫痪的特点是
房地产开发投资统计中的住宅包括()。[2011年初级真题]
下列指数中()是数量指标指数。
根据((并购重组共性问题审核意见关注要点》,管理层收购中的收购资金来源关注点包括关注上市公司及其关联方在过去两年内是否存在资金占用、担保行为及其他上市公司向管理层利益输送行为。()
在商业银行的金融业务创新中,贷款证券化属于()业务创新。
人的内心冲突及与之相伴随的情绪体验是心理学意义上的()。
【2015年河北沧州.单选】学生在英语学习中对相似的单词不能加以正确区分的现象属于()。
第一次国共合作后国民党的性质是代表()
Completethenotesbelow.WriteNOMORETHANTHREEWORDSAND/ORANUMBERforeachanswer.ExampleAnswerPurposeplacinga
最新回复
(
0
)