After a week or two, the parasites invade red blood cells and reproduce thousands of times.

VOA: special.2009.05.26

So, not just a spectrum of viruses, but there's viruses and bacteria and parasites and other microorganisms that can cause disease.

所以,不是只有病毒,还有病毒,细菌,寄生虫,和其它各种微生物都能导致疾病

耶鲁公开课 - 生物医学工程探索课程节选

Malaria can be treated, but in many areas the parasites have become resistant to different drugs.

VOA: special.2009.12.07

The animals are infected with whole parasites and treated with antibiotics at the same time.

VOA: special.2009.11.03

The parasites reproduce in the human liver, and then infect the red blood cells.

VOA: special.2010.04.20

Unlike parasites,however, they do not rob the trees of nutrition.

VOA: special.2010.04.06

Malaria parasites enter a person's blood through a mosquito bite.

VOA: special.2009.05.26

They tried it in test tubes containing the parasites.

VOA: special.2010.04.07

Over time,the parasites invade the central nervous system.

VOA: special.2010.01.04

As a result, the parasites stopped reproducing.

VOA: special.2010.04.07

Ayala discovered that parasites were responsible for Chagas, an often fatal disease afflicting millions of people in the Americas.

VOA: standard.2010.04.05

This led Ayala to similar discoveries about the parasites that cause malaria and other tropical diseases.

VOA: standard.2010.04.05

They have found a protein produced by malaria parasites that does just that.

VOA: standard.2010.01.20

In one recent study - among the 1,000 he's published - Ayala establishes that gorillas and chimps may serve as reservoirs for the parasites that cause human malaria.

VOA: standard.2010.04.05

The parasites reproduced not sexually, but by cloning.

VOA: standard.2010.04.05