首页
登录
职称英语
People from large families have an increased risk of stomach cancer, suggest
People from large families have an increased risk of stomach cancer, suggest
游客
2023-08-30
67
管理
问题
People from large families have an increased risk of stomach cancer, suggests a study that followed more than 7,000 Japanese-American men for 28 years.
The study concluded that family size had a major influence on the development of stomach cancer linked to the bacterium Helicobacter pylori (幽门螺杆菌), and that younger siblings (兄弟,姐妹,同胞,同属) from large families were especially prone to the most common form of stomach cancer.
H. pylori lives in the mucous (黏液的) layer of the stomach and is associated with peptic ulcers (消化器官溃疡) and stomach cancer. It’s estimated that half of the world’s population carries H. pylori in the stomach. It can be transmitted orally from person to person or through contact with human feces (粪便).
The study found that men who carried certain strains of H. pylori in their stomachs and had seven or more siblings had more than twice the risk of developing stomach cancer, compared to men with the same H. pylori strains who had one to three siblings.
The findings are published in the January 16 online issue of the journal Public Library of Science Medicine.
"This is a very carefully controlled study that clearly shows that there are factors in early childhood that affect the risk of developing cancer many decades later," study leader Dr. Martin J. Blaser, professor and chairman of the Department of Medicine, and professor of microbiology at New York University Medical Center and School of Medicine, said in a prepared statement.
"That early childhood events affect the risk of cancers occurring in old age is remarkable, and this may be a model for other cancers," Blaser said. He said that younger children in large families may acquire H. pylori from older siblings at a time when the younger children’s immune systems are still developing. This, in combination with the fact that the bacterium is already adapted to a genetically related person, means the younger children may have a more virulent H. pylori population in the stomach than if they’d acquired the germ from a non-relative. [br] ______ can be transmitted orally from person to person or through contact with human feces.
选项
A、H. pylori
B、Peptic ulcers
C、Bacterium
D、Stomach cancer
答案
A
解析
本题旨在考察对原文中这句里“理解。在文中第三段,我们可以找出答案为A。
转载请注明原文地址:http://tihaiku.com/zcyy/2971761.html
相关试题推荐
Icebergsareamongnature’smostspectacularcreations,andyetmostpeople
Icebergsareamongnature’smostspectacularcreations,andyetmostpeople
Icebergsareamongnature’smostspectacularcreations,andyetmostpeople
Infaceoftheevolvingglobaleconomy,theauthorsuggeststhattheemphasisin
Infaceoftheevolvingglobaleconomy,theauthorsuggeststhattheemphasisin
[originaltext]Adventuretravelisverypopulartodaywithpeopleofallage
[originaltext]Adventuretravelisverypopulartodaywithpeopleofallage
[originaltext]Adventuretravelisverypopulartodaywithpeopleofallage
Telecommunicationsisjustoneofthemeansbywhichpeoplecommunicateand,
Telecommunicationsisjustoneofthemeansbywhichpeoplecommunicateand,
随机试题
OneSaturday,MarkandJanedecidedtogotoahillneartheirvillage.They
TheNationalEcologicalObservatoryNetwork,fundedbyCongressfor$434mil
Thedoctorusedmedicineto______thesickchildofcold.A、returnB、cureC、treat
【B1】[br]【B7】[audioFiles]audio_eufm_j01_245(200910)[/audioFiles]surrounded由are
下列可直接进行监理实验的项目是()。A.钢绞线 B.水泥 C.锚具
角膜新生血管有深层、浅层两种,其中深层常侵及角膜A.上皮下 B.前弹力层下
关于典型肺炎克雷伯杆菌性肺炎特点叙述错误的是A.起病急骤、寒战高热 B.肺部可
可用于治疗房室传导阻滞的药物有:A.阿托品 B.去甲肾上腺素 C.异丙肾上腺
Inapre-listeningactivity,studentsne
胸腔闭式引流排液管一般置于()。A.2~3肋间 B.3~4肋间 C.5~6
最新回复
(
0
)