What is Toxoplasmosis and why is it important?

Toxoplasma gondii is a protozoan parasite that can infect almost all mammals and birds.  Experts in zoonotic diseases estimate that about 50% of humans worldwide have this parasite! This parasite is considered to be a significant concern because of its zoonotic potential.  A "zoonotic" disease is one that can be transmitted from animals to humans.  [...]