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
37
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] 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://tihaiku.com/zcyy/2810656.html
相关试题推荐
ResearchersattheLondonSchoolofHygieneandTropicalMedicinepublished
ResearchersattheLondonSchoolofHygieneandTropicalMedicinepublished
[originaltext]Aboutfiftydifferentvitaminshavebeenidentified,andade
ResearcherssayextravitaminEfedtoturkeysappearstohelpcontrolinfec
ResearcherssayextravitaminEfedtoturkeysappearstohelpcontrolinfec
ResearcherssayextravitaminEfedtoturkeysappearstohelpcontrolinfec
ResearcherssayextravitaminEfedtoturkeysappearstohelpcontrolinfec
ResearcherssayextravitaminEfedtoturkeysappearstohelpcontrolinfec
[originaltext]Vitaminsareessentialtolife.Todaytherearemanykindsof
[originaltext]Vitaminsareessentialtolife.Todaytherearemanykindsof
随机试题
Listentothefollowingpassage.Writeashortsummaryof150to200words
A.丹栀逍遥散 B.生铁落饮 C.甘麦大枣汤 D.柴胡疏肝散 E.八珍汤
患者,男性,19岁,受凉后2天发热,咳嗽,咳白痰,左侧胸痛,深吸气加重,无盗汗。
从所给四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:
根据下列各种事实,综合分析,预测最可能发生的结果是。①电脑的普及②电脑管理社
新生菌胶团的特征为:A.颜色深、结构紧密、吸附和氧化能力强 B.颜色深、结
按照住宅小区一般经营服务项目的分类,物业服务企业开展的房屋买卖与租赁中介业务,属
A.口服给药 B.吸入给药 C.肌内注射 D.直肠给药 E.皮下注射硫酸
某第4周期元素,当该元素原子失去一个电子成为正1价离子时,该离子的价层电子排布
最新回复
(
0
)