Download
A respiratory virus that has killed dozens of people, mainly in the Middle East, is widespread in camels and may be jumping directly from camels to humans, said a study on Tuesday.
Called Middle East Respiratory Syndrome, or MERS, it has killed 79 of the 182 people infected since September 2017, according to the World Health Organization.
The virus is related to SARS, which killed about 800 people globally in a 2003 outbreak. Camels or bats are suspected as possible animal reservoirs of MERS, though there has been little hard evidence.
But senior study author Ian Lipkin of Columbia University said research now shows the virus is "extraordinarily common" in camels and has been for at least 20 years.
"In some parts of Saudi Arabia, two-thirds of young animals have the infectious virus in their respiratory tracts," he said. "It is plausible that camels could be a major source of infection for humans."
Lipkin worked on the study with colleagues at the US National Institute of Allergy and Infectious Diseases and lead author Abdulaziz Alagaili of King Saud University in Riyadh. It was published in the journal mBio on Tuesday.
Researchers took blood samples as well as rectal and nasal swabs from more than 200 camels in Saudi Arabia in November and December of 2013.
They analyzed the samples using mobile laboratory technology and found antibodies for MERS as well as active virus, particularly in the nasal secretions of younger camels.
Overall, 74 percent of camels sampled countrywide had antibodies to MERS-CoV (coronavirus), the study said.
The team also analyzed archives of blood samples from dromedary camels - the most common species - taken from 1992 to 2010, and found evidence of MERS going back two decades.
"The virus that has been identified in these camels is identical to the virus that has been found in humans with disease," Lipkin said.
About the broadcaster:
Lance Crayon is a videographer and editor with China Daily. Since living in Beijing he has worked for China Radio International (CRI) and Global Times. Before moving to China he worked in the film industry in Los Angeles as a talent agent and producer. He has a B.A. in English from the University of Texas at Arlington.
雅思口语考试话题参考natural scenery
详解雅思口语考试评分标准和注意事项
最新雅思口语的考试评分标准
雅思口语考试话题参考Building
雅思口语素材整理中国农历新年(下)
雅思口语考试话题参考Travel
雅思口语的考前必看
雅思口语考试话题参考a teacher
雅思口语真题Spare Time
雅思口语考试话题参考handcraft
雅思有关口语考试的误区
雅思口语高分的技巧总结
雅思口语的考试答题步骤
雅思口语地道表达神探夏洛克第三季第一集
雅思口语模拟习题
雅思口语考试话题参考friend
雅思口语考试话题参考Learn
雅思口语考试中提高口语功力一些表达
雅思口语考试值得背诵的经典电影台词
雅思口语考试话题参考reading
雅思口语考试话题参考special gift
关于雅思口语考试的学习方法的总结
谈雅思口语考试中如何与考试官互动
雅思口语考试话题参考transportation
雅思口语考试话题参考Restaurant
雅思考试的口语如何取得7以上的高分
雅思口语考试备考名言的总结
看电影学雅思口语还不够互动交流是关键
雅思考试的单词分组记忆法
雅思口语考试思路参考Environment protect
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |