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
Rabies is an ordinarily infectious disease of the central nervous system, caused by a virus and, as a rule, spread chiefly by do
Rabies is an ordinarily infectious disease of the central nervous system, caused by a virus and, as a rule, spread chiefly by do
admin
2010-06-30
32
问题
Rabies is an ordinarily infectious disease of the central nervous system, caused by a virus and, as a rule, spread chiefly by domestic dogs and wild flesh-eating animals. Man and all warm-blooded animals are easily infected with rabies. The people of ancient Egypt, Greece and Rome ascribed rabies to evil spirits because ordinarily gentle and friendly animals suddenly be came, vicious and violent without evident cause and after a period of maniacal behaviour, be came paralyzed and died.
Experiments carried out in Europe in the early nineteenth century of injecting saliva from arabid dog into a normal dog proved that the disease was infectious. Preventive steps, such as the destruction of stray dogs, were taken and by 1826 the disease was permanently eliminated in Norway, Sweden and Denmark. Though urban centers on the continent of Europe were cleared several times during the nineteenth century, they soon became reinfected since rabies was uncontrolled among wild animals.
During the early stages of the disease, a rabid animal is most dangerous because it appears normal and friendly, but it will bite at the slightest provocation. The virus is present in the salivary glands and passes into the saliva so that the bite of the infected animal introduces the vi ms into a fresh wound. If no action is taken, the virus may become established in the central nervous system and finally attack the brain. The incubation period varies from ten days to eight months or more, and the disease develops more quickly the nearer to the brain the wound is. Most infected dogs become restless, nervous, and irritable and vicious, then depressed and paralyzed. With this type of rabies, the dog’s death is inevitable and usually occurs within three to five days after the onset of the symptoms.
In 1881 Pasteur discovered that the infective agent of rabies could be recovered from the brain of an animal that had died of rabies. He experimented on rabbits and developed a new variety of rabies which could safely be used for vaccination. A series of injections of this new virus made dogs resistant to the common natural virus. For the first time in 1885 the substance was used in a desperate attempt to save a badly bitten boy. The theory was that if dogs could protected in a two-week period, the longer incubation period of human beings would allow the development of a high degree of protection before the potential onset of the disease. The treatment proved successful and the boy remained well.
Anti-rabies vaccine is widely used nowadays in two ways. Dogs may be given three-year protection against the disease by one powerful injection, while persons who have been bitten by rabies animals has dropped from 9% to 0.5%. In rare cases, the vaccine will not prevent rabies in human beings because the virus produces the disease before the person’s body has time to build up enough resistance. Because of this, immediate vaccination is essential for anyone bitten by an animal observed acting strangely and the animal should be captured cautiously, and examined professionally or destroyed.
Research in the early 19th century showed______.
选项
A、rabies was an infectious disease
B、man and all warm-blooded animals were easily infected with rabies
C、stray dogs should be destroyed
D、the disease had been permanently eliminated in some big cities
答案
A
解析
本题是事实细节题。问题是19世纪早期的试验证明了什么。从第二段第一句话可以看出试验证明狂犬病是可传染的。所以,选项A是正确答案。
转载请注明原文地址:https://jikaoti.com/ti/BunsFFFM
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
IfyouarebuyingapropertyinFrance,whetherforapermanentoraholidayhome,itisimportanttoopenaFrenchbankaccount
IfyouarebuyingapropertyinFrance,whetherforapermanentoraholidayhome,itisimportanttoopenaFrenchbankaccount
What’stheaverageincreaseperyearofforeignstudentpopulationintheperiodbetween1985and1990intermsofpercentage?
Asinternationalcommercegrows,thereisanamazingdevelopmentwhichisexpandingatever-increasingrate—businessontheInte
Somemoderncitiesareusuallyfamousforpeoplewholiveaverylongtime.
Somemoderncitiesareusuallyfamousforpeoplewholiveaverylongtime.
AccordingtotheAmericanAcademyofDermatology,anestimated10to50millionpeopleinthiscountryhaveanallergicreaction
Whyisthereformofpubliceducationunlikelytohappen?
WhatdoesGeorgeOrwelldo?Whatarethelistenersgoingtodoafterthepresentation?
Wheredoesthismonologuetakeplace?
随机试题
简述劳动对意识的产生和发展的决定作用。
A.正常菌群B.条件致病菌C.生态失调D.微生态失调E.医院内感染在一定条件下致病的细菌是
A.阴B.阳C.阴中之阳D.阳中之阴E.阴中之至阴
某项目部承接了某机场项目的施工工程,该机场工程施工难度较大,为了预防施工质量事故的发生,项目经理应当从()人手挖掘和研究可能导致事故发生的原因,采取针对性措施。
行业的发展与国民经济总体的周期变动之间有一定的联系,按照两者联系的密切程度划分,可以将行业分为()。
甲公司适用的营业税税率为5%,无形资产均按照直线法摊销。有关无形资产业务如下。(1)2011年1月1日,甲公司将A专利权出租,租期为5年,每年收取租金50万元。该专利权系甲公司2010年4月1日购入,初始入账价值为100万元,预计使用年限为5年。(2)
各类法规与政策具有不同的效力,同一层次的法规与政策具有同等效力。下列法规和政策中,与部门规章具有同等效力的是()。
西哥特王国
某服装店有甲、乙、丙、丁四个缝制小组。甲组每天能缝制5件上衣或6条裤子;乙组每天能缝制6件上衣或7条裤子;丙组每天能缝制7件上衣或8条裤子;丁组每天能缝制8件上衣或9条裤子。每组每天要么缝制上衣,要么缝制裤子,不能弄混。订单要求上衣和裤子必须配套(每套衣服
Winningorlosingistemporary,butfriendship______.
最新回复
(
0
)