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

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

VOA: standard.2010.04.05

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