首页
登录
职称英语
Rabies is an ordinarily infectious disease of the central nervous system, caus
Rabies is an ordinarily infectious disease of the central nervous system, caus
游客
2023-12-16
26
管理
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 susceptible to rabies. The people of ancient Egypt, Greece and Rome ascribed rabies to evil spirits because ordinarily gently and friendly animals suddenly became vicious and violent without evident cause and, after a period of maniacal behaviour, became paralysed and died.
Experiments carried out in Europe in the early nineteenth century of injecting saliva from a rabid 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 centres 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(腺) and passes into the saliva so that the bite of the infected animal introduces the virus 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(潜伏期) 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 paralysed. 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.
Anti-rabies vaccine(疫苗) 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 rabid animals are given a course of daily injections over a week or ten days. The mortality rate from all types of bites from rabid 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 circumspectly, and examined professionally or destroyed. [br] How does the virus of a rabid animal infect man or other animals?
选项
A、The virus is infected into their bodies.
B、The bite of the infected animals passes the virus presenting the saliva to others.
C、The virus has established in their central nervous systems for several years.
D、The virus infect them by some infectious diseases.
答案
B
解析
见第三段第二句,故选B。
转载请注明原文地址:https://tihaiku.com/zcyy/3277829.html
相关试题推荐
WhichofthefollowingisNOTtrueaboutthepoliticalsystemofNewZealand?A、N
Rabiesisanordinarilyinfectiousdiseaseofthecentralnervoussystem,cau
Rabiesisanordinarilyinfectiousdiseaseofthecentralnervoussystem,cau
"Iwanttocriticizethesocialsystem,andtoshowitatwork,atitsmosti
Therearetwomainmethodsoforganizinggovernments—theunitarysystemand
Therearetwomainmethodsoforganizinggovernments—theunitarysystemand
TheAmericanTaxSystemGovernmentsraiserevenuest
TheAmericanTaxSystemGovernmentsraiserevenuest
TheAmericanTaxSystemGovernmentsraiserevenuest
TheAmericanTaxSystemGovernmentsraiserevenuest
随机试题
Exceptionalchildrenaredifferentinsomesignificantwaysfromothersoft
Youshouldspendabout20minutesonQuestions1-13,whicharebasedonReading
Jim,thenewlyelecteddirector,hadtoreorganizetheentireoffice;heangrily
[originaltext]M:Today,I’mtalkingtotherenownedbotanist,JaneForster.
下图为三个西方古典建筑局部立面,图面高度画成一样,实际大小是不一样的,按实际大小
下列不属于地籍区、地籍子区划分原则的是()。A.尽量保持原城镇地籍数据库中
假设现货为2200点,按照2000点的行权价买入看涨期权,则此看涨期权的内在价值
人在每一瞬间,将心理活动选择了某些对象而忽略了另一些对象。这一特点指的是注意的(
驰名商标的特殊保护方法有A.就相同或者类似商品申请注册的商标是复制、摹仿或者翻译
电火花是电极间的击穿放电;大量电火花汇集起来即构成电弧。下列叙述所产生的电火花中
最新回复
(
0
)