Nearly 850 species of parasites are known to infect people; some, like the potentially deadly plasmodium parasite that causes ...

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A parasite called Toxoplasma gondii infects an enormous number of people around the world. Scientists estimate that up to one ...

It infects nearly one-third of the global population, yet its microscopic size makes the parasite difficult for scientists to study. That parasite is Toxoplasma gondii, a widespread organism that ...