标题: 为什么蚊子咬你不咬他 [打印本页] 作者: conie 时间: 2012-6-28 17:08 标题: 为什么蚊子咬你不咬他 Bite Me: Why Mosquitoes Love Some and Leave Others 天气越来越热，蚊子也越来越活跃。站在河边或树林边上，我们很快就会受到蚊子的攻击。那么，蚊子是靠什么很快就发现我们在哪里的呢？几个人同住一个房间，经常是有的人反复被蚊子叮咬，而有的人却很少被蚊子叮咬或感觉不到蚊子的存在。这究竟是怎么回事呢？
Research reveals why some people are constantly under attack from the bloodsucking insects, while others walk free.
For those unfortunate enough to feature highly on the mosquito hit list, summer nights are synonymous with mosquito bites. Yet others hardly ever get bitten. So how do the bloodthirsty insects select their victims?
The mosquito season gives rise to countless speculations about possible solutions to the age-old mystery of mosquito preferences.
The insects’ tastes may seem arbitrary. However, research reveals that when mosquitoes make their choice between potential victims, it all comes down to scent.
Mosquitoes are attracted by carbon dioxide and heat, which everyone gives off. But mosquitoes are also attracted by certain scents.Karl-Martin Vagn Jensen According to Jensen, it has not yet been established exactly what the scents in question are. But research does indicate that some scents are more attractive to mosquitoes than others.
“All the lab employees rubbed petri dishes against their stomachs. In that way, their scents were deposited on the dishes, which were then put in an enclosure full of mosquitoes,” he says.
“The mosquitoes repeatedly landed on some of the petri dishes, but didn’t go anywhere near the others. “
The experiment is one of several to squash one of the many myths concerning the unfortunate art of mosquito attraction.
The theory about vitamin B has been tested very, very thoroughly, and it doesn’t hold.
While some believe that it is in fact sour blood that keeps the insects at bay, or that the mosquitoes can detect blood disease, others are convinced that vitamin B provides protection against mosquitoes.
The only reliable method of protection against mosquitoes is to use one of the effective repellents that are sold over the counter.
Mosquito repellent contains some smells that confuse the mosquitoes. The first thing a mosquito does when looking for prey is to see if there are any animals or people in the vicinity
