A deadly strain of avian flu may have passed between people for the first time, experts believe.The avian influenza A (H7N9) virus is thought to have been transmitted between father and daughter in eastern China, according to research published online by the British Medical Journal (BMJ).
The findings provide the strongest evidence yet of H7N9 transmission between humans since its discover in February, but its ability to transmit itself was deemed limited and non-sustainable by the Chinese researchers behind the study.At the end of June 133 cases had been reported, including 43 deaths. Most infections have been among people visiting markets, selling live birds or among those who had contact with live poultry（家禽） in the seven to 10 days before being ill.
The latest study examined the case of a 60-year-old father who regularly visited a live poultry market and became ill five to six days after his last visit in March. He was admitted to hospital with fever, cough and shortness of breath. Despite intensive care treatment he died of multiple organ failure on 4 May. His 32-year-old daughter, who was previously healthy, looked after him at his bedside before he was admitted to intensive care. She had no known exposure to live poultry before falling ill with a very high temperature, cough and fever. The daughter developed symptoms six days after her last contact with her father and was admitted to hospital where she died of multiple organ failure on 24 April.
Follow-up investigations(调查) uncovered almost genetically identical virus strains from each patient, suggesting transmission from father to daughter. Another 43 people were also tested who had had close contact with the father, daughter or both.
Dr Peter Horby, senior clinical research fellow at the Oxford University Clinical Research Unit in Hanoi, Vietnam, said of the study: The most likely source of infection for the daughter was her father, during the period that she cared for him while he was ill. He said “limited person to person transmission had been reported for other strains like H5N1 , H7N7, and the pig origin flu virus H3N2. Those strains had been around for more than a decade but have not progressed any further down the path towards a world-wide virus.” “Limited human-to-human transmission of H7N9 virus is therefore not surprising, but strengthening to monitor it was still needed,” Dr Horby added.
【小题1】What’s the main idea of the passage ?A．The findings about H7N9 transmission only between father and daughter .B．H7N9 transmission may be spreading between people .C．133 cases of H7N9 transmission have been reported .D．Both the father and daughter died of multiple organ failure.【小题2】The reason why the daughter died of multiple organ failure was that .A．she fell ill with a very high temperature, cough and fever.B．she was exposed to live poultry before falling ill.C．she had close contact with the father while caring for her sick father .D．she sold live birds in five to six days before falling ill .【小题3】Which of the following is Wrong about H7N9 transmission?A．It was limited and non-sustainableB．It was person to person transmission C．It wasn’t progressed any further down the path towards a world-wide virus.D．It happened between father and daughter .【小题4】The underlined word s “was deemed” in paragraph 2 probably means A．was decreased B．was regarded asC．was thought ofD．was developed【小题5】What type of writing is the article likely to be ?A．A news report.B．Popular science.C．A medical reportD．A medical findingsB
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(答案→)B
解析：本文是一篇关于H7N9禽流感在人际间传播的一篇报道。研究人员通过对因患H7N9禽流感而死亡的一对父女的病例研究认为H7N9禽流感存在人与人之间传播的可能，但是指出H7N9禽流感这种人传人的效力很低，公众没有必要恐慌。
【小题1】B主旨大意题。本文为科学研究类文章，开头亮明主题，本文首句A deadly strain of avian flu may have passed between people for the first time, experts believe。然后围绕这一话题叙述具体研究过程和发现，所以文章中心是：(H7N9) virus可能在人与人之间传播。故B选项正确。
【小题2】C推理判断题。从文章最后一段The most likely source of infection for the daughter was her father, during the period that she cared for him while he was ill.可知32岁的女儿没有接触过活禽，但是在照顾父亲六天后出现发烧等禽流感症状。所以她死亡的病因是和患禽流感的父亲的密切接触。故C选项正确。
【小题3】D细节理解题。从末段Those strains had been around for more than a decade but have not progressed any further down the path towards a world-wide virus.”可知目前H7N9禽流感病毒大规模人传人可能性不大。所以D选项正确。
【小题4】B词义猜测题。A被减少；B被认为；C被想起；D被发展。limited and non-sustainable 是H7N9病毒的特点，根据语境此处应该是指研究人员认为H7N9病毒传播的能力是有限的，非持续性的。故B选项正确。
【小题5】D推理判断题。从文章内容我们可知这是一篇关于H7N9流感病毒的报道，所以文章应该属于医学发现类文章。所以D选项正确。