VOA标准英语2012--Texas Health Officials Study West Nile Outbreak
时间：2019-01-13 作者：英语课 分类：VOA标准英语2012年(八月)
Texas Health Officials Study West Nile Outbreak
Technicians in the state's mosquito laboratory are examining mosquito corpses 1 sent from all over Texas, at the Texas Department of Health Services Laboratories in the capital of Austin.
State Laboratories Director Grace Kubin said technicians use animal tissue that is susceptible 2 to West Nile virus to test the mosquito samples.
“We add in, essentially 3, the ground-up mosquitoes," said Kubin. "We have to grind them up; that releases the virus. And now we have that in a liquid form and we can use that to infect the cells.”
Kubin said the tests provide results within 48 hours so the lab can advise local officials on what action to take.
Mosquitoes aren't born with West Nile virus. They generally get it from biting birds that are infected.
Right bird, right time
To ingest the virus, mosquitoes need to find, so to speak, the right bird at the right time, according to Texas State Veterinarian Tom Sidwa. Some birds survive the virus.
“The birds only have the virus remaining in their blood from one to four days after they get infected. Then they have life-time immunity 4, so you have to find that bird that has the virus in its blood stream," said Sidwa.
From the Austin command center, Sidwa manages the state effort to track the West Nile outbreak. He said his team got an early warning months ago from routine testing of donated blood.
“This year we got advance notice that there was activity by virtue 5 of that testing and people who were donating blood testing positive for West Nile. That does not mean they are sick. Some of them may be, but they have the virus in their system,” he said.
Most infected people unaware 6 of it
Sidwa said most infected people are unaware of it. Symptoms can include fever, headache and feeling tired. For the small percentage whose brains are affected 7 by the virus, it can be debilitating 8 and even deadly.
“The way it manifests is everything from 80 percent of the people with no symptoms, to 20 percent with a lesser 9 disease, and roughly one percent - or one in 150 - will develop the severe neurological form of the disease,” said Sidwa.
As the hot weather subsides 10 in the weeks ahead, Sidwa said he expects the number of reported West Nile cases to taper 11 off. And he said what has been learned this year will help in dealing 12 with future outbreaks.
- The living soldiers put corpses together and burned them. 活着的战士把尸体放在一起烧了。 来自《简明英汉词典》
- Overhead, grayish-white clouds covered the sky, piling up heavily like decaying corpses. 天上罩满了灰白的薄云，同腐烂的尸体似的沉沉的盖在那里。 来自汉英文学 - 中国现代小说
- Children are more susceptible than adults.孩子比成人易受感动。
- We are all susceptible to advertising.我们都易受广告的影响。
- Really great men are essentially modest.真正的伟人大都很谦虚。
- She is an essentially selfish person.她本质上是个自私自利的人。
- The law gives public schools immunity from taxation.法律免除公立学校的纳税义务。
- He claims diplomatic immunity to avoid being arrested.他要求外交豁免以便避免被捕。
- He was considered to be a paragon of virtue.他被认为是品德尽善尽美的典范。
- You need to decorate your mind with virtue.你应该用德行美化心灵。
- They were unaware that war was near. 他们不知道战争即将爆发。
- I was unaware of the man's presence. 我没有察觉到那人在场。
- She showed an affected interest in our subject.她假装对我们的课题感到兴趣。
- His manners are affected.他的态度不自然。
- The debilitating disease made him too weak to work. 这个令他衰弱的病，使他弱到没有办法工作。
- You may soon leave one debilitating condition or relationship forever. 你即将永远地和这段霉运说拜拜了。
- Kept some of the lesser players out.不让那些次要的球员参加联赛。
- She has also been affected,but to a lesser degree.她也受到波及，但程度较轻。
- Emotion swells and subsides. 情绪忽高忽低。 来自《现代汉英综合大词典》
- His emotion swells and subsides. 他的情绪忽高忽低。 来自《现代英汉综合大词典》
- You'd better taper off the amount of time given to rest.你最好逐渐地减少休息时间。
- Pulmonary arteries taper towards periphery.肺动脉向周围逐渐变细。