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

因为疟疾是种复杂寄生病，它有三个发病机制。

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，科学家在肯尼亚有过样发现：相对于体内没有寄生子，患有寄生病儿童对蚊子有更强烈吸引力。

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.

在某些情况下，快克或可卡因滥用导致种叫做妄想性寄生病，感觉子或昆在皮肤下爬行。

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.

我们可以改点。我们还可以对付其他热带病，例如血吸病，是种使人身体衰弱寄生病，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.

至少是乔治亚大学（University of Georgia）寄生病学家雷·卡普兰（Ray Kaplan）在他最近发表有关问题研究综述中得出结论。

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.

但他们并不确定数百种蛋白质如何离开寄生病进入血红细胞。所以他们关注种名为HSP1 01蛋白质，然后找到些答案。

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.

个极端例子是种叫做妄想性寄生病心理状况，人们认为他们身体被螨或跳蚤滋生，在他们皮肤上下窜动，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… … 下降主要集中在传染病和寄生病死亡人数上，类疾病最有可能受到水质和可用性影响。