时间:2019-01-14 作者:英语课 分类:VOA标准英语2011年(六月)


英语课

Identifying Source of Deadly E. Coli Remains 1 a Challenge


Frustration 2 is building in Europe as the source of Germany's E. coli outbreak remains unsolved. U.S. health experts say tracking down a deadly germ can be a complicated task.

When they notice an unusual number of people coming down with food poisoning, the first thing public health officials do is try to find out what they all ate recently. E. coli usually takes three or four days to make a person sick, but it may take a week or more. And that presents the first problem.

"Can you tell me what you ate for dinner on May 30?" asks David Weber, professor of epidemiology at the University of North Carolina at Chapel 3 Hill. He says people often do not remember everything they ate over the past week. And even if they do, they may not know all the ingredients, or where they came from. For example, he says, a tomato condiment 4 called salsa was one of the suspects in a 2008 Salmonella outbreak in the United States.

"It's not just the salsa, but in the salsa are tomatoes, onions, peppers, spices. And then, which manufacturer made the salsa? Where did they get the tomatoes from? Who was the wholesaler 5? How many different growers provided tomatoes during that week to that wholesaler?"

Tracing the germ all the way back to the grower may help investigators 6 figure out what went wrong and how to keep it from happening again. But whatever crop is causing the outbreak was picked some time ago. And by the time investigators get to the farm,

"That crop may be gone. It may even be plowed 7 under," says Ben Chapman, a food safety expert at North Carolina State University. He notes that investigators have been focusing on fresh produce, but at this point, weeks after the outbreak started, they may not even be able to trace the offending item as far as the patient's refrigerator.

"It's pretty unlikely that you have a cucumber or a tomato or lettuce 8 sticking around in your fridge six or seven weeks after being exposed," says Chapman.

Given all the complications, it may be surprising that investigators ever figure out the cause of an outbreak. But the science of epidemiology has gotten very good in recent years, and most of the time they do.

The U.S. state of Oregon's public health department is recognized as one of the nation's best. But sometimes officials there are stumped 9.

"There have been a couple where there's been, really, at the end of the day, no idea what the product was. It's clearly gone. The outbreak ends. It's very frustrating 10. But, whatever it was, it disappeared," says William Keene, senior epidemiologist for the Oregon public health department.

Meanwhile, European officials say the number of new E. coli cases appears to be slowing down. That may mean the outbreak will soon come to an end, with or without identifying the cause.



n.剩余物,残留物;遗体,遗迹
  • He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
  • The remains of the meal were fed to the dog.残羹剩饭喂狗了。
n.挫折,失败,失效,落空
  • He had to fight back tears of frustration.他不得不强忍住失意的泪水。
  • He beat his hands on the steering wheel in frustration.他沮丧地用手打了几下方向盘。
n.小教堂,殡仪馆
  • The nimble hero,skipped into a chapel that stood near.敏捷的英雄跳进近旁的一座小教堂里。
  • She was on the peak that Sunday afternoon when she played in chapel.那个星期天的下午,她在小教堂的演出,可以说是登峰造极。
n.调味品
  • It has long been a precious condiment.它一直都是一种珍贵的调味料。
  • Fish sauce is a traditional fermented condiment in coastal areas.鱼露是沿海地区的传统发酵调味品。
n.批发商
  • We're the largest furniture wholesaler in Illinois. 我们是伊利诺伊州最大的家具批发商。 来自辞典例句
  • These are used to create profiles for each wholesaler. 这是他日常的工作或通过与批发商的正式会谈。 来自互联网
n.调查者,审查者( investigator的名词复数 )
  • This memo could be the smoking gun that investigators have been looking for. 这份备忘录可能是调查人员一直在寻找的证据。
  • The team consisted of six investigators and two secretaries. 这个团队由六个调查人员和两个秘书组成。 来自《简明英汉词典》
v.耕( plow的过去式和过去分词 );犁耕;费力穿过
  • They plowed nearly 100,000 acres of virgin moorland. 他们犁了将近10万英亩未开垦的高沼地。 来自辞典例句
  • He plowed the land and then sowed the seeds. 他先翻土,然后播种。 来自辞典例句
n.莴苣;生菜
  • Get some lettuce and tomatoes so I can make a salad.买些莴苣和西红柿,我好做色拉。
  • The lettuce is crisp and cold.莴苣松脆爽口。
僵直地行走,跺步行走( stump的过去式和过去分词 ); 把(某人)难住; 使为难; (选举前)在某一地区作政治性巡回演说
  • Jack huffed himself up and stumped out of the room. 杰克气喘吁吁地干完活,然后很艰难地走出房间。
  • He was stumped by the questions and remained tongue-tied for a good while. 他被问得张口结舌,半天说不出话来。
adj.产生挫折的,使人沮丧的,令人泄气的v.使不成功( frustrate的现在分词 );挫败;使受挫折;令人沮丧
  • It's frustrating to have to wait so long. 要等这么长时间,真令人懊恼。
  • It was a demeaning and ultimately frustrating experience. 那是一次有失颜面并且令人沮丧至极的经历。 来自《简明英汉词典》
学英语单词
access manager
acquired immune deficiency syndromes
adiabatic curve
ailurophiles
amplified interpretation
Ant-Vireo
Antonia
atomic angular momentum
attachment flange
automatic bypass valve
babyishly
baitshops
Bembridae
bemeant
Blastocladiales
censor out
ciprofibrate
colour-serjeant
comb ... hair
concho-grass
crinkley
daemonophobia
Decaspermum esquirolii
Dryopteris fragrans
eaved
Europa, Pta.de
evaporator strip holder
farras
ferroprotoporphyrin
froth flotation
fuddling
full wave rectifier
genus Placuna
grease pits
half-height drive
have someone's guts for garters
Hawtrey, Mt.
holes in pattern
in-thing
indirect discrimination
indirect-arc furnace
istake measure
japao
katsuwonus pelamiss
keramite (mullite)
license plate
longbeards
lounge around
manual removal
marjayouns
meet sb halfway
methyl p-methyl benzoate
model following
mucopolysaccharide-N-acetylneuraminylhydrolase
none-kin
nonsonorous
odd moment
offskip
oil flinger
on my case
otelo
pancratic lens
Periyār R.
perpetuum mobile of the first kind
piledriver
pole jumps
product introduction
pronouncement of judgment
pulse-phase system
quarion
REA Rural Electrification Administration
recursive descent parser
scabricola ocellata
scheduling model
schlottmann
scurfy
sealing effect
secondary homonym
secondary metal
self-operated control valve
sociology departments
squeeze mouding machine
sridevi
standard hour system
statutory assignee
styrene-acrylonitrile copolymer
sufferances
taper thimble
thin-layer chromatogram
transmission-utilization ratio
trintignant
tubular(tracheal)sound
two-pence
underutilize
unheled
V and T
vapo(u)rizability
Vicia tenuifolia
wagon control computer
wire rope detector
year dot
zabras