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
41
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.
The successful attempt to save a badly bitten boy in 1885 was based on the theory that______.
选项
A、infective agent of rabies could be used for vaccination
B、a series of injections of new virus could make people resistant to rabies
C、the infective agent of rabies could be recovered from the infected body
D、the longer incubation period would enable human body to build up enough resistance
答案
D
解析
推断判断题。第四段的倒数第二句提到疫苗应用的理论依据是:如果狗在两周内因注射疫苗而受到保护的话,那么人体更长的疾病潜伏期可使人通过疫苗在狂犬病发作之前在体内形成保护机制。只有选项D是对这一理论的概括。
转载请注明原文地址:https://kaotiyun.com/show/XeJd777K
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
A、Onlyamonghunters.B、Amongprimaryschoolpupils.C、Amongbeautifulladies.D、Amongpeoplewhoarediscussingpolitics.D
IfyouarebuyingapropertyinFrance,whetherforapermanentoraholidayhome,itisimportanttoopenaFrenchbankaccount
WhatdoesGeorgeOrwelldo?
AccordingtotheAmericanAcademyofDermatology,anestimated10to50millionpeopleinthiscountryhaveanallergicreaction
AccordingtotheAmericanAcademyofDermatology,anestimated10to50millionpeopleinthiscountryhaveanallergicreaction
Thereisonekindofpainforwhichnobodyhasyetdevisedacure—thepainthatcomesfromtheendingofarelationship.Therel
Duetohistoricalreasons,peopleintheCzechRepubliclacked________.
Duetohistoricalreasons,peopleintheCzechRepubliclacked________.
Wheredoesthismonologuetakeplace?
随机试题
Thevolcanoesthatraisedtheislandsarestill______places.
于某药物的Na2CO3溶液中滴加Ag-NO3试液,开始生成白色沉淀,经振摇即溶解,继续滴加AgNO3试液,生成的白色沉淀经振摇则不再溶解,该药物应是
会阴部手术术后护理,错误的是
女患者,28岁,停经50天,恶心呕吐10天,加重3天,食入即吐,呕吐酸苦水,胸胁满闷,头晕头胀,烦渴口苦,舌淡红,苔薄黄,脉弦滑,查尿妊娠试验阳性,中医辨证为
为提高司法效率,法官的下列做法中正确的有:()
甲公司目前主营产品为A,A产品所在行业竞争者众多,市场进入较容易,产品无差异。甲公司为了改善营业绩,调整竞争策略,聘请一家咨询公司对A产品的市场进行了分析。目前,甲公司与主要竞争对手乙公司、丙公司的竞争态势矩阵,见表2-1。为了进一步拓展业务范
当股份公司因解散或破产进行清算时,优先股股东可优先于普通股股东分配公司的剩余资产,但一般是按优先股票的()清偿。
按照中国人民银行规定的口径,以下属于我国商业银行核心资本的有()。
遵从团体规范的成员将得到团体的奖赏,比如会被团体的其他成员以友好的方式对待、赞扬,在需要的时候可以得到其他成员的帮助等,这是()。
在教“鱼”的概念时,用鲫鱼、草鱼说明“终生生活在水中,用鳃呼吸”是鱼这一概念的本质特征,这是适当地运用了()
最新回复
(
0
)