"Could microscopic parasites have the ability to take control of a human being? Scientists are starting to think so.
A third of the world's population may have a parasitic infection that scientists believe to have an impact on human behavior.
The protozoan parasite, called Toxoplasma gondii, has long been considered to be an "asymptomatic" parasite in humans. But lab tests and a new report suggest that it may cause or intensify severe forms of schizophrenia, could have an impact on how human hormones are secreted in the brain, and may cause personality changes."
I look forward to this being used in a criminal case here. For either side. :)