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
One of the most important organizations designed to combat fatal infectious diseases in poor countries goes by the unwieldy name
One of the most important organizations designed to combat fatal infectious diseases in poor countries goes by the unwieldy name
admin
2013-07-02
78
问题
One of the most important organizations designed to combat fatal infectious diseases in poor countries goes by the unwieldy name of the Global Fund to Fight AIDS, Tuberculosis and Malaria. The link between the first two is well established. AIDS does not kill directly. Rather, the damage it does to the immune system opens an individual to other infections that would frequently be fought off by a healthy body. Of these, tuberculosis is one of the most important. Some 12% of deaths of people infected with HIV, the virus mat causes AIDS, are from tuberculosis, and, conversely, 16% of tuberculosis deaths are AIDS-related. The disease of malaria kills a lot of people — at least 1 million a year, although the exact figure is hard to come by — but there was little obvious medical connection between it and the other two.
No longer. Over the past few years a number of studies have suggested mat those who are infected with HIV are more susceptible to malaria, and that the malaria parasite, in turn, raises the number of virus particles in those with HIV. Now, a study published in Science by Laith Abu-Raddad of the University of Washington, in Seattle, and his colleagues has tried to put some numbers on the problems.
The study’s starting point is that the number of virus particles in the blood of someone infected with HIV increases about ten-fold during an attack of malaria. This seems to be due, paradoxically, to the immune system’s response to the malarial parasite. That response produces proteins called cytokines, which have the perverse effect of encouraging HIV to replicate.
The increase in the number of virus particles is transient, and may do little harm to the individual’s own long-term prospects, but it does make him(or her)more likely to pass the infection on during sex. Conversely, the damage HIV does to the immune system means that the malarial parasite can more easily breed unchecked. That means people are more susceptible to infection in the first place, and that more parasites are available to be transmitted from person to person by the mosquitoes that spread them. Dr. Abu-Raddad and his colleagues looked at past studies and came up with a set of numbers that can be plugged into a mathematical model they have developed of how, based on other papers, they think the diseases interact. They then applied the model to Kisumu, a part of Kenya that has a high prevalence of both diseases.
The model suggests the peak of the HIV epidemic in Kisumu is 8% higher than what it would have been if there were no interaction between the diseases, while the peak level of malaria is 13% higher. Moreover, and in contrast to tuberculosis, where the peak lags seven years behind that of HIV, malaria peaked only one year after the peak of the HIV epidemic.
What can we know from the first paragraph?
选项
A、AIDS is the direct cause that leads to people’s death.
B、Individuals infected AIDS can’t fight off other viruses normally.
C、Those who catch tuberculosis have a high possibility of HIV infection.
D、AIDS is often caused by tuberculosis virus.
答案
B
解析
事实细节题。第一段中提到:患有艾滋病的个体易于感染其他疾病,而健康人体通常可以抵御这些疾病,这就说明了患有艾滋病的人不能正常地(nor—mally)抵御这些疾病,故选项[B]正确。[A]与事实相反,艾滋病并不直接使人丧命;[C]在文中没有提及;原文只是说肺结核是息艾滋病的人容易感染的疾病,故[D]错误。
转载请注明原文地址:https://kaotiyun.com/show/ESn7777K
0
大学英语六级
相关试题推荐
HostilitytoGypsieshasexistedalmostfromthetimetheyfirstappearedinEuropeinthe14thcentury.TheoriginsoftheGyps
A、Sheisaninteriordesigner.B、Sheisplanningtodecorateherhouse.C、She’dliketodesignbyherself.D、Shedesignedtheho
Is20th-centurycapitalismfailing21st-centurysociety?Membersoftheglobalelitedebatedthatunusualquestionattheannual
A、Almostonemillion.B、About600thousand.C、Nearly400thousand.’D、Approximately200thousand.BHowmanystolencarscanbe
A、Itincreasedthestudents’whitebloodcellcount.B、Itincreasedsomestudents’energylevel.C、Itimprovedthestudents’abi
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand1
A、Itincreasedthestudents’whitebloodcellcount.B、Itincreasedsomestudents’energylevel.C、Itimprovedthestudents’abi
Roadcourtesyisgoodsensebecause______.Themaintroublewithyoungdriversisthat______.
A、Troubled.B、Wicked.C、Patient.D、Humorous.C这位图书馆员为女士想了很多办法,显然非常富于耐心
随机试题
Teachingchildrentoreadwellfromthestartisthemostimportanttaskofelementaryschools.Butrelyingoneducatorstoappr
按体重计算,入院当日应补充的生理需要量( )每100ml日需量的液体配制为( )
A.拇指内侧端B.食指末端C.中指端D.无名指末端E.小指外侧端
如果纳米新型材料公司与商某委托开发完成了发明创造,则在双方没有约定的情况下申请专利的权利应属于()。在商某与纳米新型材料公司的委托研究开发中虽未取得最终成功,但也取得了一些成果,而对这些成果的使用权和转让权,双方没有约定,则()。
国家对严重危及施工安全的()实行淘汰制度。
SDH传输设备系统级测试的主要项目有()。
1.已知资料:卖方:BEllINGYIUANCL,OTHINGMANUFACTURECO.,LTD.买方:TSMAPLECOMPANY合同号:EUR0070615成交价格:CIFSTAVANGER
()是税收优惠的主要方面。
2010年3月1日,某会计师事务所受一家中外合资经营企业(以下简称“合资企业”)的委托,对该企业2009年度的财务状况进行审计,并为其出具审计报告。该会计师事务所指派的注册会计师进驻合资企业之后,了解到以下情况:(1)合资企业系由香港的甲公司与内地的乙公
A、Copythearticleaboutscorpions.B、Havelunchwithhim.C、Buybooksaboutscorpions.D、GotoCanadawithhim.A对话末尾,男子说他想要一份这
最新回复
(
0
)