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
In July, almost unnoticed by the national press, a deadly bird virus arrived on a pheasant farm in Surrey. Experts from the Depa
In July, almost unnoticed by the national press, a deadly bird virus arrived on a pheasant farm in Surrey. Experts from the Depa
admin
2015-01-09
29
问题
In July, almost unnoticed by the national press, a deadly bird virus arrived on a pheasant farm in Surrey. Experts from the Department for the Environment, Food and Rural Affairs(Defra)identified Newcastle disease, a virus usually mortal to turkeys and geese but not humans, in a flock of 9, 000 pheasant chicks imported from France ahead of the shooting season.
Within hours of the diagnosis, veterinary experts had swung into action, throwing up a 3km exclusion zone around the farm near Cobham and culling 10,000 birds. The carcasses were burned and premises cleaned to stop the virus escaping. It was four weeks before Defra’s Veterinary Exotic Diseases Division felt it was safe for poultry move virus, has reached Turkey, similar emergency plans are being readied by officials from Defra and other agencies. The scenario they are preparing for is that the H5N1 virus, which so far has led to the culling of billions of chickens in south-east Asia and 60 human deaths, will soon arrive on these shores.
What happens next depends on where the outbreak occurs, whether it can be contained and—most important of all—whether it mutates to become infectious between people. So far, only poultry workers or those directly exposed to chicken faeces or blood are thought to be at risk, though direct human-to-human transmission cannot be ruled out. "Every time a new person gets infected with the virus there is a small chance that person will trigger a pandemic," said Neil Ferguson, a scientist at Imperial College, who has been running simulations on what might happen were H5N1 to reach Britain. "It’s a very small chance, probably 1 in 1,000, 1 in 10,000 or less."
Should diseased birds reach Britain, the first step for veterinary officials would be to contain the outbreak as they did with Newcastle disease. An amber alert would be sounded and samples sent to the Veterinary Laboratory Agency(VLA)in Weybridge, Surrey. If Ian Brown, the head of avian virology there, confirms the cause of death as H5N1, the alert level will be raised to red and a whole series of emergency procedures, from quarantine, restriction of poultry movements to culling, will swing into action. Other agencies, such as the Department of Health, the Health Protection Agency and the Ministry of Defence, would be brought into the loop. In the event that the outbreak cannot be contained, Defra may have to consider mass culling programmes and the possibility of vaccination.
At this point, with the risk of the virus spreading to human populations, the Department of Health would appoint a UK national influenza pandemic committee to coordinate the response of hospital trusts and local authorities. The Civil Contingency Secretariat(CCS)of the Cabinet will also be alerted and Cobra, the emergency committee which coordinates Whitehall’s response to terrorism, readied for a possible breakdown in civil order.
The Department of Health’s pandemic preparedness plan published in March envisages as many as 54, 000 Britons dying in the first few months of a flu pandemic. But in June, CCS officials warned that that could be an underestimate. The more likely figure, they said, was 700,000—projection the Department of Health is expected to take on board when it updates its pandemic plan later this month.
In the most serious case, officials estimate there would be as many deaths in the 12 weeks of an epidemic as there usually are in a year. At the peak of the pandemic, 19,000 people would reguire hos-pital beds, prompting councils to requisition schools to accommodate the sick.
To treat the dying, the government would begin drawing down its stockpiles of Tamiflu(药名), an anti-viral drug that treats flu. But with only 14m courses, enough for a quarter of the population, likely to be available, sooner or later rationing would have to be imposed, with health professionals and essential civil servants the first in line. The government would also come under pressure to release stores of its precious flu vaccine. At present there are contingency plans for just two to three million doses. But there is no guarantee that vaccines which protect against annual human flu strains will also work against H5N1.
The consequences hardly bear thinking about. Earlier this year, in a dress rehearsal in the East Midlands codenamed, Operation Arctic Circle, officials quickly concluded that mass mortuaries would be needed to bury the dead. But no one knows whether, in the event of a pandemic, any of these measures will prove effective. John Avizienius, senior scientific officer at the RSPCA and a member of Defra’s avian influenza stakeholder group, said: "All you can do is plan for the worst case scenario."
The fear is that wild geese moving from western China to Siberia may have spread the virus to several species of ducks and gulls that briefly visit British shores on their annual migration north. These ducks, many of which may not show signs of illness, may be passing on the virus to poultry on British farms.
In the hope that they are not, Defra and the Wildfowl and Wetland announced last week that they would be conducting tests on 11,000 wild birds—three times the normal level. "The risk of avian in-fluen-za spreading from eastern Russia to the UK via migrating birds is still low," said Defra’s chief vet, Debby Reynolds. "However, we have said all along that we must remain on the look out."
The change of alert colors from amber to red implies that____.
选项
A、all poultry workers must leave their working places as soon as possible
B、the officials in the Department of Health must call for much more of international assistance
C、the most serious situation of bird-flu has appeared
D、the change of the color functions greatly as the weather reports do
答案
C
解析
推理题。本题的解题点在第四段。文章提到“…the alert level will be raised to red and a wholeseries of emergency procedures,…Other agencies,such as the Department of Health,the HealthProtection Agency and the Ministry of Defense,would be brought into the loop.”可见红色警报的等级非常高,国家卫生部、卫生防御部甚至国防部都要联合进行疫情防御工作,所以推出正确答案是C选项。其他选项的意思文中均没有提及,所以是不正确的。
转载请注明原文地址:https://jikaoti.com/ti/NY6YFFFM
0
考博英语
相关试题推荐
Readthefollowingparagraphandthenwritearesponsepaperofabout250to300Englishwords.WriteitneatlyonANSWERSHEET(
Itdeniestothepastanintegrityandwillofitsown,______peopleactedoutofavarietyofmotivesand______eventshadamul
Ifhalftheenergythatgoesintoviolentactswereputtogooduse,ifoureffortsweredirectedatcleaninguptheslumsandg
Whilehiseffortsweretremendoustheresultsappearedtobevery______.
Themost______exampleofwaterpollutionoccurredin1969,whentheCuyahogaRiverinOhiocaughtfireandhelpedshockAmerica
AIDSiscausinggreatpublicconcernbecausethe______fataldiseasehitsprimarilyyoungpeople.
Theamazingsuccessofhumansasa【1】istheresultoftheevolutionarydevelopmentofourbrainswhichhasled,amongotherthin
Thisarticledealswiththenatural______whichismostinterestingtoeveryone.
Julietisnotatwork.Sheistakinga______untiltheendofthisweek.
TheordinaryfamilycolonialNorthAmericawasprimarilyconcernedwithsheerphysicalsurvivalandbeyondthat,itsowneconomi
随机试题
X线管焦点的调制传递函数(MTF)的叙述,错误的是
“六淫”是指( )。
咯血的特征正确的是
对于行政诉讼中人民法院调取证据的说法正确的是( )。
场址比较的建设条件比较包括()。
某施工单位参与某公路工程的投标,经造价工程师估价,该工程预算成本为10800万元,其中材料费占60%。施工单位拟采用高、中、低三个报价方案,其利润率分别为9%、6%、3%,根据过去类似工程的投标经验,相应的中标概率分别为0.2、0.5、0.8。招标人在招标
培训方案制订的常用方法有()。
采用面向对象方法开发软件的过程中,抽取和整理用户需求并建立问题域精确模型的过程叫(16)。
以下不属于网络管理对象的是()。
算法复杂度主要包括时间复杂度和【】复杂度。
最新回复
(
0
)