科学美国人60秒 SSS 2014-07-01

搜索关注在线英语听力室公众号：tingroom，领取免费英语资料大礼包。

 

Malaria is caused by plasmodium parasites⁵, which are transmitted by mosquitoes. A decade ago, scientists found that Kenyan kids infected with plasmodium were more attractive to mosquitos than were kids who were parasite-free. But they did not know what drew the bloodsuckers to the unfortunate infected children.

 

To find out, researchers took mice that harbored the rodent⁶ version of malaria and put the animals in a wind chamber⁷. And they found that mosquitos flocked toward the infected animals, attracted by their smell alone.

 

By chemically analyzing⁸ the animals’ scents⁹, the researchers found that the parasites boost the levels of a variety of odorous compounds that attract mosquitoes. So plasmodium is manipulating both its victim and its carrier to get itself spread far and wide.

 

The finding may help with malaria prevention: if we can mask or harness the eau d’ infection, maybe we could nose the mosquitoes away from people.

 

Thanks for the minute, for Scientific Americans 60-Second Science. I am Karen Hopkin.

分享到：