Well because malaria is a complex parasitic disease that plays on three grounds.

因为疟疾是一种复杂的寄生虫，它有三个发机制。

A decade ago, scientists found that Kenyan kids infected with plasmodium were more attractive to mosquitos than were kids who were parasite-free.

十年前，科学家肯尼亚有过这样的发现：相对于体内没有寄生虫的孩子，患有寄生虫的儿童对蚊子有更强烈的吸引力。

In some cases, crack or cocaine abuse can lead to something called Delusional Parasitosis-the feeling that bugs or insects are crawling under the skin.

些情况下，快克或可卡因滥用导致一种叫做妄想性寄生虫，觉虫子或昆虫皮肤下爬行。

We can change this. We can tackle other tropical diseases, too, such as schistosomiasis, a debilitating parasitic disease that affects 200 million people a year.

我们可以改变这一点。我们还可以对付其他的热带，例如血吸虫，这是一种使人身体衰弱的寄生虫，每年对2亿人产生影响。

This, at least, is the conclusion drawn by Ray Kaplan, a parasitologist at the University of Georgia who has just published a review of research on the problem.

这至少是乔治亚大学（University of Georgia）寄生虫学家雷·卡普兰（Ray Kaplan）他最近发表的有关这一问题的研究综述中得出的结论。

But they were not sure how the hundreds of different proteins actually left the parasite and entered the red blood cell. So they focused on a protein called HSP1 01 and found some answers.

但他们并不确定这数百种蛋白质如何离开寄生虫进入血红细胞的。所以他们关注一种名为HSP1 01的蛋白质，然后找到一些答案。

One extreme example is a psychological condition called delusory parasitosis where people believe their bodies are infested with mites or fleas scurrying over and under their skin, making them itch incessantly.

一个极端的例子是一种叫做妄想性寄生虫的心理状况，人们认为他们的身体被螨虫或跳蚤滋生，他们的皮肤上下窜动，使他们不停地发痒。

After 1995, the fall accelerated in privatising municipalities... The fall was concentrated in deaths from infectious and parasitic diseases, the sort most likely to be affected by water quality and availability.

1995年之后，城市私有化进程中死亡率下降速度加快… … 下降主要集中传染和寄生虫死亡人数上，这类疾最有可能受到水质和可用性的影响。