In 2010, Hahn and colleagues discovered that gorillas were
the origin of the human malaria parasite Plasmodium falciparum, the most prevalent and lethal of the malaria parasites that infect people.
Malaria, a scourge on
human society that still kills more than 400,000 people a year, is often thought to be
of more modern
origin — ranging from 15,000 to 8 million years old, caused primarily by one genus
of protozoa, Plasmodium, and spread by anopheline mosquitoes.