首页
登录
职称英语
Researchers say extra vitamin E fed to turkeys appears to help control infec
Researchers say extra vitamin E fed to turkeys appears to help control infec
游客
2023-07-05
48
管理
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. [br] Which of the following is the EXCEPTION about the function of vitamin E?
选项
A、It helps protect some necessary fatty acids for healthy cells.
B、Vitamin E only helps control infections from listeria.
C、Vitamin E helps the poultry develop more infection-fighting cells.
D、Extra amounts of vitamin E can improve the quality of meat.
答案
B
解析
细节题。此题采用排除法。根据短文第四段中It helps protect some kinds offatty acids that are necessary for healthy cells.Vitamin E helps prevent oxygen fromcombining with these fats to cause damage to cells.可知选项A、D表述正确;根据倒数第二段中added vitamin E develop more infection—fighting cells可知选项C表述正确。故选B。
转载请注明原文地址:https://tihaiku.com/zcyy/2809690.html
相关试题推荐
Theneedforbirthcontrolmethodshasdevelopedfairlyrecently,withthed
Theneedforbirthcontrolmethodshasdevelopedfairlyrecently,withthed
Theneedforbirthcontrolmethodshasdevelopedfairlyrecently,withthed
Theneedforbirthcontrolmethodshasdevelopedfairlyrecently,withthed
Theneedforbirthcontrolmethodshasdevelopedfairlyrecently,withthed
Theneedforbirthcontrolmethodshasdevelopedfairlyrecently,withthed
ResearchersattheLondonSchoolofHygieneandTropicalMedicinepublished
[originaltext]Aboutfiftydifferentvitaminshavebeenidentified,andade
[originaltext]Aboutfiftydifferentvitaminshavebeenidentified,andade
ResearcherssayextravitaminEfedtoturkeysappearstohelpcontrolinfec
随机试题
Thisreminder(提示)isintendedtoofferguidanceforusingemail.Thisisnot
Aristotledefinedafriendas"asinglesouldwellingintwobodies".Member
[originaltext]W:Allright,thatcomesto$20.75.Doyouhaveoneofourstore
[originaltext]Nowyou’veonlybeentherethisonesemestersothisisyour
工作组组网模型中,工作组可分为()。A.个人组 B.总体组 C.全局组 D
2019年2月中下旬,某市统计局随机抽取2000名在该市居住半年以上的18~65
反应速率与反应物浓度无关,而受其他因素影响的反应称A.伪一级反应B.二级反应C.
与银行业相比,保险业的资产投资对经济增长的影响具有一些独特的属性。其中不包括(
自动喷水灭火系统的维护管理人员应经过消防专业培训,下列不属于维护管理人员应熟悉内
根据企业所得税法的规定,某企业同时具有境内、境外业务(企业境外业务都在同一国家)
最新回复
(
0
)