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
Many who think they have food allergies(过敏)actually do not. A new report, commissioned by the federal government, finds the fiel
Many who think they have food allergies(过敏)actually do not. A new report, commissioned by the federal government, finds the fiel
admin
2014-12-18
35
问题
Many who think they have food allergies(过敏)actually do not. A new report, commissioned by the federal government, finds the field is full of poorly done studies, misdiagnoses and tests that can give misleading results.
While there is no doubt that people can be allergic to certain foods, the true incidence of food allergies is only about 8 percent for children and less than 5 percent for adults, said Dr. Marc Riedl, an author of the new paper and an allergist and immunologist at the University of California, Los Angeles.
Yet about 30 percent of the population believe they have food allergies. And, Dr. Riedl said, about half the patients coming to his clinic because they had been told they had a food allergy did not really have one. Dr. Riedl does not dismiss the seriousness of some people’s responses to foods. But, he says, "That accounts for a small percentage of what people term ’food allergies.’ " Even people who had food allergies as children may not have them as adults. People often shed allergies, though no one knows why. And sometimes people develop food allergies as adults, again for unknown reasons.
For their report, Dr. Riedl and his colleagues reviewed all the papers they could find on food allergies-more than 12,000 articles. In the end, only 72 met their criteria, which included having sufficient data for analysis and using more rigorous tests for allergic responses.
"Everyone has a different definition" of a food allergy, said Dr. Jennifer J. Schneider Chafen, the lead author of the new report. People who receive a diagnosis after one of the two tests most often used— piercing the skin and injecting a tiny amount of the suspect food and looking in blood for IgE antibodies(抗体), the type associated with allergies—have less than a 50 percent chance of actually having a food allergy, the investigators found.
One way to see such a reaction is with what is called a food challenge, giving people a suspect food disguised so they do not know if they are eating it or a placebo(安慰剂)food. If the disguised food causes a reaction, the person has an allergy.
But in practice, most doctors are reluctant to use food challenges, Dr. Riedl said. They believe the test to be time consuming, and worry about asking people to consume a food, like peanuts, that can elicit a frightening response.
The paper, to be published Wednesday in The Journal of the American Medical Association, is part of a large project organized by the National Institute of Allergy and Infectious Diseases to try to impose order on the chaos of food allergy testing. An expert panel will provide guidelines defining food allergies and giving criteria to diagnose and manage patients. They hope to have a final draft by the end of June.
The IgE antibodies are produced when ______.
选项
A、the skin is pierced
B、the suspect food is injected
C、there is an allergic reaction
D、there is a diagnosis
答案
C
解析
该句中the type associated with allergies是对IgE antibodies的进一步解释。可见,IgE这种抗体与过敏症有关,这也就是说,当人体发生过敏反应时,就会产生IgE抗体。因此,本题应选C。
转载请注明原文地址:https://kaotiyun.com/show/70m7777K
0
大学英语六级
相关试题推荐
Weallhaveregrets,butnewresearchsuggeststhemostcommonregretamongAmericanadultsinvolvesalostromanticopportunity
Weallhaveregrets,butnewresearchsuggeststhemostcommonregretamongAmericanadultsinvolvesalostromanticopportunity
ItsaysHTV-relateddeathsappeartohavereachedtheirhighestpointin2004.Sincethe【B1】______,deathshavefallenbyaround
A、HowtopreventchildrenfromwatchingTV.B、HowchildrenlikefrighteningTVprograms.C、WhatbadeffectsTVprogramshaveon
ReturningtoScienceA)TeresaGarrettwasworkingpart-timeasabiochemistrypostdoc(博士后).Shehadaninfantathome,andshew
A、Sheisnotintheplacetojudge.B、Themanshouldblamehimself.C、Thebusinessdeservestheman’swaiting.D、Sheisnotgood
HowCustomsWorkA)Oneofthelittleritualsallinternationaltravelersgothroughiscustoms.Tomostpeople,thisisjustano
HowCustomsWorkA)Oneofthelittleritualsallinternationaltravelersgothroughiscustoms.Tomostpeople,thisisjustano
Forthispart,youareallowed30minutestowriteashortessayentitledOnStudents’EvaluationofTeachersfollowingtheoutl
随机试题
A、妊娠合并肾炎B、妊娠期高血压疾病C、妊娠合并心脏病D、妊娠期糖尿病E、妊娠合并甲状腺功能亢进有关并发症最密切的是:真菌性阴道炎()
对于阳性对比剂的叙述,错误的是
良性肿瘤与恶性肿瘤的最主要鉴别点是
当市场机制不能有效地实现经济的一般均衡和资源的最优配置,这种情况叫做( )。
某证券公司获得了中国证监会的批准,为期货公司提供中间介绍业务。该证券公司可以提供的服务是()。[2012年6月真题]
在小学儿童的伙伴关系发展中,伙伴协同的社会交往趋势发生在()。
同样是《白蛇传》,美丽善良多情的白素贞在京剧里是姓“京”,到了昆曲中便姓了“昆”,而常香玉演来则_______是一位河南白娘子。同样的_______,被不同的戏曲剧种表达出来,构成了戏曲舞台_______的风貌,给人以独特的艺术享受。填入画横线部分最恰当的
简述两税法产生的背景、内容及其评价。
(46).Studieshaveshownthatpregnantwomenwhodrinkcoffeearemorelikelythanotherwomentogivebirthtosmallbabies.Th
Americancitiesare【C1】______otherdriesaroundtheworld.Ineverycountry,citiesreflectthe【C2】______oftheculture.Cit
最新回复
(
0
)