红斑痤疮是由细菌引起
文章来源:未知 文章作者:enread 发布时间:2012-08-30 06:49 字体: [ ]  进入论坛
(单词翻译:双击或拖选)
Scientists are closer to establishing a definitive1 bacterial2 cause for the skin condition rosacea(红斑痤疮). This will allow more targeted, effective treatments to be developed for sufferers, according to a review published in the Journal of Medical Microbiology. Rosacea is a common dermatological(皮肤病学的) condition that causes reddening and inflammation of the skin mostly around the cheeks, nose and chin. In severe cases skin lesions may form and lead to disfigurement. Rosacea affects around 3% of the population -- usually fair-skinned females aged3 30-50 and particularly those with weak immune systems. The condition is treated with a variety of antibiotics4, even though there has never been a well-established bacterial cause.
 
A new review carried out by the National University of Ireland concludes that rosacea may be triggered by bacteria that live within tiny mites6 that reside in the skin.
 
The mite5 species Demodex folliculorum is worm-like in shape and usually lives harmlessly inside the pilosebaceous unit(毛囊皮脂腺) which surrounds hair follicles of the face. They are normal inhabitants of the face and increase in number with age and skin damage -- for example, following exposure to sunlight. The numbers of Demodex mites living in the skin of rosacea patients is higher than in normal individuals, which has previously7 suggested a possible role for the mites in initiating8 the condition.
 
More recently, the bacterium9 Bacillus oleronius was isolated10 from inside a Demodex mite and was found to produce molecules11 provoking an immune reaction in rosacea patients. Other studies have shown patients with varying types of rosacea react to the molecules produced by this bacterium -- exposing it as a likely trigger for the condition. What's more, this bacterium is sensitive to the antibiotics used to treat rosacea.
 
Dr Kevin Kavanagh who conducted the review explained, "The bacteria live in the digestive tracts12 of Demodex mites found on the face, in a mutually beneficial relationship. When the mites die, the bacteria are released and leak into surrounding skin tissues -- triggering tissue degradation13 and inflammation."
 
"Once the numbers of mites increase, so does the number of bacteria, making rosacea more likely to occur. Targeting these bacteria may be a useful way of treating and preventing this condition," said Dr Kavanagh. "Alternatively we could look at controlling the population of Demodex mites in the face.. Some pharmaceutical14 companies are already developing therapies to do this, which represents a novel way of preventing and reversing rosacea, which can be painful and embarrassing for many people."


点击收听单词发音收听单词发音  

1 definitive YxSxF     
adj.确切的,权威性的;最后的,决定性的
参考例句:
  • This book is the definitive guide to world cuisine.这本书是世界美食的权威指南。
  • No one has come up with a definitive answer as to why this should be so.至于为什么该这样,还没有人给出明确的答复。
2 bacterial dy5z8q     
a.细菌的
参考例句:
  • Bacterial reproduction is accelerated in weightless space. 在失重的空间,细菌繁殖加快了。
  • Brain lesions can be caused by bacterial infections. 大脑损伤可能由细菌感染引起。
3 aged 6zWzdI     
adj.年老的,陈年的
参考例句:
  • He had put on weight and aged a little.他胖了,也老点了。
  • He is aged,but his memory is still good.他已年老,然而记忆力还好。
4 antibiotics LzgzQT     
n.(用作复数)抗生素;(用作单数)抗生物质的研究;抗生素,抗菌素( antibiotic的名词复数 )
参考例句:
  • the discovery of antibiotics in the 20th century 20世纪抗生素的发现
  • The doctor gave me a prescription for antibiotics. 医生给我开了抗生素。
5 mite 4Epxw     
n.极小的东西;小铜币
参考例句:
  • The poor mite was so ill.可怜的孩子病得这么重。
  • He is a mite taller than I.他比我高一点点。
6 mites d5df57c25d6a534a9cab886a451cde43     
n.(尤指令人怜悯的)小孩( mite的名词复数 );一点点;一文钱;螨
参考例句:
  • The only discovered animals are water bears, mites, microscopic rotifers. 能够发现的动物只有海蜘蛛、螨和微小的轮虫。 来自辞典例句
  • Mites are frequently found on eggs. 螨会经常出现在蛋上。 来自辞典例句
7 previously bkzzzC     
adv.以前,先前(地)
参考例句:
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
8 initiating 88832d3915125bdffcc264e1cdb71d73     
v.开始( initiate的现在分词 );传授;发起;接纳新成员
参考例句:
  • He is good at initiating projects but rarely follows through with anything. 他善于创建项目,但难得坚持完成。 来自《简明英汉词典》
  • Only the perchlorate shows marked sensitiveness and possibly initiating properties. 只有高氯酸盐表现有显著的感度和可能具有起爆性能。 来自辞典例句
9 bacterium BN7zE     
n.(pl.)bacteria 细菌
参考例句:
  • The bacterium possibly goes in the human body by the mouth.细菌可能通过口进入人体。
  • A bacterium is identified as the cause for his duodenal ulcer.一种细菌被断定为造成他十二指肠溃疡的根源。
10 isolated bqmzTd     
adj.与世隔绝的
参考例句:
  • His bad behaviour was just an isolated incident. 他的不良行为只是个别事件。
  • Patients with the disease should be isolated. 这种病的患者应予以隔离。
11 molecules 187c25e49d45ad10b2f266c1fa7a8d49     
分子( molecule的名词复数 )
参考例句:
  • The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
  • Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里,大分子裂变为小分子。
12 tracts fcea36d422dccf9d9420a7dd83bea091     
大片土地( tract的名词复数 ); 地带; (体内的)道; (尤指宣扬宗教、伦理或政治的)短文
参考例句:
  • vast tracts of forest 大片大片的森林
  • There are tracts of desert in Australia. 澳大利亚有大片沙漠。
13 degradation QxKxL     
n.降级;低落;退化;陵削;降解;衰变
参考例句:
  • There are serious problems of land degradation in some arid zones.在一些干旱地带存在严重的土地退化问题。
  • Gambling is always coupled with degradation.赌博总是与堕落相联系。
14 pharmaceutical f30zR     
adj.药学的,药物的;药用的,药剂师的
参考例句:
  • She has donated money to establish a pharmaceutical laboratory.她捐款成立了一个药剂实验室。
  • We are engaged in a legal tussle with a large pharmaceutical company.我们正同一家大制药公司闹法律纠纷。
TAG标签: skin bacterial rosacea
发表评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
验证码:点击我更换图片