北极白鲸体内发现猫类寄生虫
文章来源:未知 文章作者:enread 发布时间:2014-02-15 06:51 字体: [ ]  进入论坛
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University of British Columbia scientists have found for the first time an infectious form of the cat parasite1 Toxoplasma gondii in western Arctic Beluga, prompting a health advisory2 to the Inuit people who eat whale meat. The same team also discovered a new strain of the parasite, previously3 sequestered4(隐退) in the icy north, that is responsible for killing5 406 grey seals in the north Atlantic in 2012.
 
Presenting their findings today at the 2014 Annual Meeting of the American Association for the Advancement6 of Science (AAAS), Michael Grigg and Stephen Raverty from UBC's Marine7 Mammal Research Unit say that the "big thaw8" occurring in the Arctic is allowing never-before-seen movement of pathogens(病原体) between the Arctic and the lower latitudes9.
 
"Ice is a major eco-barrier for pathogens," says Michael Grigg, a molecular10 parasitologist with the U.S. National Institutes of Health and an adjunct professor at UBC. "What we're seeing with the big thaw is the liberation of pathogens gaining access to vulnerable new hosts and wreaking11 havoc12(肆虐)."
 
Toxoplasmosis, also known as kitty litter disease, is the leading cause of infectious blindness in humans and can be fatal to fetuses13 and to people and animals with compromised immune systems.
 
"Belugas are not only an integral part of Inuit culture and folklore14, but also a major staple15 of the traditional diet. Hunters and community members are very concerned about food safety and security," says Raverty, a veterinary pathologist with the B.C. Ministry16 of Agriculture and Lands' Animal Health Centre and an adjunct professor at UBC. Raverty has led the systematic17 sampling and screening of hunter-harvested Beluga for 14 years.
 
Grigg has also identified the culprit of the 2012 grey seal die-off as a new strain of Sarcocystis. While not harmful to humans, the Arctic parasite, which was named Sarcocystis pinnipedi at the AAAS meeting today, has now killed an endangered Steller sea lion, seals, Hawaiian monk18 seals, walruses19(海象), polar and grizzly20 bears in Alaska and as far south as British Columbia.


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1 parasite U4lzN     
n.寄生虫;寄生菌;食客
参考例句:
  • The lazy man was a parasite on his family.那懒汉是家里的寄生虫。
  • I don't want to be a parasite.I must earn my own way in life.我不想做寄生虫,我要自己养活自己。
2 advisory lKvyj     
adj.劝告的,忠告的,顾问的,提供咨询
参考例句:
  • I have worked in an advisory capacity with many hospitals.我曾在多家医院做过顾问工作。
  • He was appointed to the advisory committee last month.他上个月获任命为顾问委员会委员。
3 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。
4 sequestered 0ceab16bc48aa9b4ed97d60eeed591f8     
adj.扣押的;隐退的;幽静的;偏僻的v.使隔绝,使隔离( sequester的过去式和过去分词 );扣押
参考例句:
  • The jury is expected to be sequestered for at least two months. 陪审团渴望被隔离至少两个月。 来自《简明英汉词典》
  • Everything he owned was sequestered. 他的一切都被扣押了。 来自《简明英汉词典》
5 killing kpBziQ     
n.巨额利润;突然赚大钱,发大财
参考例句:
  • Investors are set to make a killing from the sell-off.投资者准备清仓以便大赚一笔。
  • Last week my brother made a killing on Wall Street.上个周我兄弟在华尔街赚了一大笔。
6 advancement tzgziL     
n.前进,促进,提升
参考例句:
  • His new contribution to the advancement of physiology was well appreciated.他对生理学发展的新贡献获得高度赞赏。
  • The aim of a university should be the advancement of learning.大学的目标应是促进学术。
7 marine 77Izo     
adj.海的;海生的;航海的;海事的;n.水兵
参考例句:
  • Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
  • When the war broke out,he volunteered for the Marine Corps.战争爆发时,他自愿参加了海军陆战队。
8 thaw fUYz5     
v.(使)融化,(使)变得友善;n.融化,缓和
参考例句:
  • The snow is beginning to thaw.雪已开始融化。
  • The spring thaw caused heavy flooding.春天解冻引起了洪水泛滥。
9 latitudes 90df39afd31b3508eb257043703bc0f3     
纬度
参考例句:
  • Latitudes are the lines that go from east to west. 纬线是从东到西的线。
  • It was the brief Indian Summer of the high latitudes. 这是高纬度地方的那种短暂的晚秋。
10 molecular mE9xh     
adj.分子的;克分子的
参考例句:
  • The research will provide direct insight into molecular mechanisms.这项研究将使人能够直接地了解分子的机理。
  • For the pressure to become zero, molecular bombardment must cease.当压强趋近于零时,分子的碰撞就停止了。
11 wreaking 9daddc8eb8caf99a09225f9daa4dbd47     
诉诸(武力),施行(暴力),发(脾气)( wreak的现在分词 )
参考例句:
  • Coal mining is a messy business, often wreaking terrible environmental damage nearby. 采矿是肮脏的行业,往往会严重破坏周边环境。
  • The floods are wreaking havoc in low-lying areas. 洪水正在地势低洼地区肆虐。
12 havoc 9eyxY     
n.大破坏,浩劫,大混乱,大杂乱
参考例句:
  • The earthquake wreaked havoc on the city.地震对这个城市造成了大破坏。
  • This concentration of airborne firepower wrought havoc with the enemy forces.这次机载火力的集中攻击给敌军造成很大破坏。
13 fetuses eae25b106f4ed68558631a5bf44c9293     
n.胎,胎儿( fetus的名词复数 )
参考例句:
  • DNA was extracted from fetuses at mid-gestation, about 10 days past conception. DNA从受孕大约10天后的中期妊娠胚胎中提取。 来自互联网
  • Brucellosis is a disease that causes fetuses to abort in cattle. 普鲁士菌病是一种可以导致牲畜胎儿夭折的疾病。 来自互联网
14 folklore G6myz     
n.民间信仰,民间传说,民俗
参考例句:
  • Zhuge Liang is a synonym for wisdom in folklore.诸葛亮在民间传说中成了智慧的代名词。
  • In Chinese folklore the bat is an emblem of good fortune.在中国的民间传说中蝙蝠是好运的象征。
15 staple fGkze     
n.主要产物,常用品,主要要素,原料,订书钉,钩环;adj.主要的,重要的;vt.分类
参考例句:
  • Tea is the staple crop here.本地产品以茶叶为大宗。
  • Potatoes are the staple of their diet.土豆是他们的主要食品。
16 ministry kD5x2     
n.(政府的)部;牧师
参考例句:
  • They sent a deputation to the ministry to complain.他们派了一个代表团到部里投诉。
  • We probed the Air Ministry statements.我们调查了空军部的记录。
17 systematic SqMwo     
adj.有系统的,有计划的,有方法的
参考例句:
  • The way he works isn't very systematic.他的工作不是很有条理。
  • The teacher made a systematic work of teaching.这个教师进行系统的教学工作。
18 monk 5EDx8     
n.和尚,僧侣,修道士
参考例句:
  • The man was a monk from Emei Mountain.那人是峨眉山下来的和尚。
  • Buddhist monk sat with folded palms.和尚合掌打坐。
19 walruses 617292179d7a1988bfff06ba7b4f606b     
n.海象( walrus的名词复数 )
参考例句:
  • Walruses have enormous appetites and hunt for food almost constantly. 海象食欲极大,几乎一直在猎取食物。 来自互联网
  • Two Atlantic walruses snuggle on an ice floe near Igloolik, Nunavut, Canada. 加拿大努勒维特伊格卢利克附近,两头大西洋海象在浮冰上相互偎依。 来自互联网
20 grizzly c6xyZ     
adj.略为灰色的,呈灰色的;n.灰色大熊
参考例句:
  • This grizzly liked people.这只灰熊却喜欢人。
  • Grizzly bears are not generally social creatures.一般说来,灰熊不是社交型动物。
TAG标签: whale Arctic parasite
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