温暖的气候可能造成更多的耐药性感染
文章来源:未知 文章作者:enread 发布时间:2018-05-22 08:25 字体: [ ]  进入论坛
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A person's chances of acquiring a drug-resistant1 infection may be higher if she lives in a warmer area.
 
A study appearing today in Nature Climate Change from researchers at the University of Toronto (U.T.) and Children's Hospital Boston links the emergence2 of drug-resistant bacteria to a hotter climate. Researchers found a 10-degree Celsius3 increase in daily minimum temperature was associated with a small increase in resistance in common pathogens, including those that develop into methicillin-resistant Staphylococcus aureus (MRSA), the root of many persistent4 and sometimes deadly hospital infections. "This is a very important and timely study stemming from meticulously5 collected and arranged records of antibiotic6 resistance," says Elena Naumova, an epidemiologist at Tufts University who was not involved in the work. "What's great about this study is that they really broaden the concept of antibiotic-resistance patterns."
 
Scientists have long observed bacteria in the laboratory grow and reproduce more quickly at warmer temperatures. And increased growth can cause a hike in resistant strains when DNA7 mutations crop up during reproduction. Bacteria can also swap8 DNA with one another and spread resistance via a process called horizontal gene9 transfer, which also increases at higher temperatures. Now scientists are asking if this phenomenon also occurs outside the laboratory.
 
The research was enabled by a large-scale data collection effort to create a free and open Web-based application that gives the geographical10 locations of drug-resistant bacteria. The site, called Resistance Open, allows anyone in the world to punch in their postal11 code and see which drug-resistant infections are present in their hometown. "For a physician, they can have a better understanding of what is happening in the community rather than just in their hospital," says John Brownstein, a professor of medicine at Harvard Medical School and co-senior author of the study. And the tool allows scientists to see new patterns in drug resistance, such as how it may be affected12 by climate.


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1 resistant 7Wvxh     
adj.(to)抵抗的,有抵抗力的
参考例句:
  1. Many pests are resistant to the insecticide.许多害虫对这种杀虫剂有抵抗力。
  2. They imposed their government by force on the resistant population.他们以武力把自己的统治强加在持反抗态度的人民头上。
2 emergence 5p3xr     
n.浮现,显现,出现,(植物)突出体
参考例句:
  1. The last decade saw the emergence of a dynamic economy.最近10年见证了经济增长的姿态。
  2. Language emerges and develops with the emergence and development of society.语言是随着社会的产生而产生,随着社会的发展而发展的。
3 Celsius AXRzl     
adj.摄氏温度计的,摄氏的
参考例句:
  1. The temperature tonight will fall to seven degrees Celsius.今晚气温将下降到七摄氏度。
  2. The maximum temperature in July may be 36 degrees Celsius.七月份最高温度可能达到36摄氏度。
4 persistent BSUzg     
adj.坚持不懈的,执意的;持续的
参考例句:
  1. Albert had a persistent headache that lasted for three days.艾伯特连续头痛了三天。
  2. She felt embarrassed by his persistent attentions.他不时地向她大献殷勤,使她很难为情。
5 meticulously AoNzN9     
adv.过细地,异常细致地;无微不至;精心
参考例句:
  1. The hammer's silvery head was etched with holy runs and its haft was meticulously wrapped in blue leather. 锤子头是纯银制成的,雕刻着神圣符文,而握柄则被精心地包裹在蓝色的皮革中。 来自辞典例句
  2. She is always meticulously accurate in punctuation and spelling. 她的标点和拼写总是非常精确。 来自辞典例句
6 antibiotic KNJzd     
adj.抗菌的;n.抗生素
参考例句:
  1. The doctor said that I should take some antibiotic.医生说我应该服些用抗生素。
  2. Antibiotic can be used against infection.抗菌素可以用来防止感染。
7 DNA 4u3z1l     
(缩)deoxyribonucleic acid 脱氧核糖核酸
参考例句:
  1. DNA is stored in the nucleus of a cell.脱氧核糖核酸储存于细胞的细胞核里。
  2. Gene mutations are alterations in the DNA code.基因突变是指DNA密码的改变。
8 swap crnwE     
n.交换;vt.交换,用...作交易
参考例句:
  1. I will swap you my bicycle for your radio.我想拿我的自行车换你的收音机。
  2. This comic was a swap that I got from Nick.这本漫画书是我从尼克那里换来的。
9 gene WgKxx     
n.遗传因子,基因
参考例句:
  1. A single gene may have many effects.单一基因可能具有很多种效应。
  2. The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
10 geographical Cgjxb     
adj.地理的;地区(性)的
参考例句:
  1. The current survey will have a wider geographical spread.当前的调查将在更广泛的地域范围內进行。
  2. These birds have a wide geographical distribution.这些鸟的地理分布很广。
11 postal EP0xt     
adj.邮政的,邮局的
参考例句:
  1. A postal network now covers the whole country.邮路遍及全国。
  2. Remember to use postal code.勿忘使用邮政编码。
12 affected TzUzg0     
adj.不自然的,假装的
参考例句:
  1. She showed an affected interest in our subject.她假装对我们的课题感到兴趣。
  2. His manners are affected.他的态度不自然。
TAG标签: climate bacteria infection
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