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
2011-02-11
44
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.
Without treatment, the virus in an infected animal will ______.
选项
A、enter immediately to the brain
B、develop immediately to the wound
C、incubate for 10 days to 8 months
D、pass into a fresh wound
答案
C
解析
第三段讲了,如果不采取行动的话,病毒会侵入中枢神经系统,最后侵害大脑,潜伏期一般为10天至8个月。所以选C。
转载请注明原文地址:https://kaotiyun.com/show/BZeO777K
0
专业英语八级
相关试题推荐
WhichcountrywasneverbethecolonyoftheGreatBritain?
A、Three.B、Six.C、Nine.D、Four.C
TherepublicanmovementhasbeengatheringmomentuminAustraliasincebecamePrimeMinisterin199
Thecostsassociatedwithnaturaldisastersareincreasingrapidly.Asaresult,officialsingovernmentandindustryhavefocus
DemocracyDemocracyisnotanewconcept.TheancientAthenianshadademocraticsystem.TheirdemocracywasthesameasAme
ClassificationofLodgingPlacesThetouristindustryhasitsownsystemtoclassifydifferenttypesoflodgingplaces.Five
A、RevolutionaryWarB、theFirstWorldWarC、warsinvolvedAmericaD、theCivilWarD
A、inflationB、budgetdeficitC、nationalsecurityD、unemploymentrateC
A、fightsagainstracialdiscriminationB、fightsforwomen’srightofvotingC、participatesinademonstrationagainstgovernment
A、isthestrongestamongthethree.B、istheweakestamongthethree.C、makespublicpolicies.D、makesFederalLaws.B
随机试题
其治疗应用:该病失治后可出现下列何种疾病:
休克微循环痉挛期的主要变化是
人民法院受理破产申请后,已经开始而尚未终结的有关债务人的民事诉讼或者仲裁应当中止;在()之后.该诉讼或者仲裁继续进行。
下列市场预测程序中,正确的顺序是()。
下列关于矿产资源的说法中,正确的是()
甲公司是一家光伏生产企业。近几年,我国开始大力发展新能源,出台了若干促进光伏产业发展的政策,光伏产业逐渐发展壮大起来。甲公司也进入了快速发展阶段,销售额和出口额近十年来平均增长15%以上。员工也由原来的不足200人增加到了2000多人。甲公司采用
王某2012年3月取得稿酬20000元,讲课费4000元,已知稿酬所得适用个人所得税税率为20%,并按应纳税额减征30%,劳务报酬所得适用个人所得税税率为20%。根据个人所得税法律制度的规定,王某应缴纳个人所得税额为()元。
简述留置权的含义及成立条件。(2012年简答54)
蟋蟀是一种非常有趣的昆虫。宁静的夏夜,草丛中传来阵阵清脆悦耳的鸣叫声,那是蟋蟀在歌唱。蟋蟀优美动听的歌声并不是出自它的好嗓子,而是来自它的翅膀。左右两翅一张一合,相互摩擦,就可以发出悦耳的声响了。蟋蟀还是建筑专家,与它那柔弱的挖掘工具相比,蟋蟀的住宅真可以
Toitsfans,itisaddictive.Tothemedia,itisapromisingmoney-maker.Sudoku,anoldpuzzlelongpopularinJapanisfastg
最新回复
(
0
)