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【科学60秒】非洲人也可能患疟疾
听力简介：
A new development in malaria:
“Plasmodium vivax, the world’s most common malaria parasite, now infects people previously considered to be ____1____.”
Peter Zimmerman from Case Western Reserve University school of medicine spoke at the AAAS meeting in Washington on February 19th.
“So, red blood cells of most African people do not ____2____ the Duffy blood-group protein. Now, the Duffy blood-group protein is ____3____ for Plasmodium vivax to get into the red cell. Duffy-negative Africans have been considered to be resistant to Plasmodium vivax.”
Zimmerman studied Malagasy populations on Madagascar. He found that 10 percent of Duffy-negative subjects were in fact ____4____ Plasmodium vivax.
“So we’ve shown that Plasmodium vivax has cleared Duffy negativity. If Plasmodium vivax is evolving to learn how to infect the Duffy-negative red cell, then a large continent of people suddenly ____5____ a new form of malaria.”
【视听版科学小组荣誉出品】
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