首页
登录
职称英语
One of the most important organizations designed to combat fatal infectious
One of the most important organizations designed to combat fatal infectious
游客
2023-08-29
33
管理
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. [br] What would be the best title for the passage?
选项
A、A Mathematical Model for AIDS
B、The Global Fund to Fight Diseases
C、Three Hard Diseases Troubling the World
D、AIDS and Malaria — A Vicious Circle
答案
D
解析
主旨大意题。从文章内容来看,主要是考证艾滋病和疟疾之间的关系。其中也提到了肺结核,但它不是文章的主体,文章从一开始就指出艾滋病和疟疾之间的关系尚没有确定,而在接下来的段落里就是用研究来说明这两者的关系,所以选项[D]正确,不仅指出了主体,还点明了两者的关系。
转载请注明原文地址:https://tihaiku.com/zcyy/2967045.html
相关试题推荐
Thegravitationalpulloftheearthandmoonisimportanttousasweattemp
Thegravitationalpulloftheearthandmoonisimportanttousasweattemp
Thegravitationalpulloftheearthandmoonisimportanttousasweattemp
Ifcertainimportantelementsaremissing,adietwhichcontainsnothingharmful
Whenshoppingonline,itisimportanttobearafewbasicsinmind.Notonl
Whenshoppingonline,itisimportanttobearafewbasicsinmind.Notonl
Whenshoppingonline,itisimportanttobearafewbasicsinmind.Notonl
Whenshoppingonline,itisimportanttobearafewbasicsinmind.Notonl
Whenshoppingonline,itisimportanttobearafewbasicsinmind.Notonl
[originaltext]WhoisthemostimportantpersonintheUnitedStates?Someo
随机试题
[originaltext]W:Whenwillthetrainleave?M:It’ssaidtobeginat13:00o’cl
[originaltext]M:Excuseme;I’mtryingtofindmywaytoReynoldsHall.W:Reyn
主视图与左视图()A.长对正 B.高平齐 C.宽相等
相对而言,机械价格信息中对于工程计价更为重要的是()。A:设备市场价格信息
Thechangeinthatvillagewasmiraculou
定期清查,一般是年末进行()。A.专项清查 B.全面清查 C.局部清查 D
某农场通过大规模的并购活动,兼并多家同类型农场,农产品的种植规模和产量得到大幅度
“这一定律体现了天上运动与地上运动的统一性,它把天体运动纳入根据地面上的实验得到
某投资产品年化收益率为10%,张先生今年投入5万元,五年后按年复利计算比按单利计
提供个人理财服务的机构包括( )。A.信托公司 B.保险公司 C.商
最新回复
(
0
)