Toxoplasmosis
The Stanley Research Medical Institute of Maryland indicates that people infected with Toxoplasma are more likely to develop schizophrenia and manic depression.
Czech researcher Jaroslav Flegr, professor of Charles University in Prague claims that men infected with Toxoplasmosis MAY become more aggressive, antisocial, and appear scruffy and less attractive. Women, on the other hand, may become less trustworthy, seem more fun loving, and become more promiscuous. (Whoa...that's some scientific conclusion)
Also interesting: about 40% of adults in Britian and the US have titers for Toxoplasmosis indicating that they have been previously infected with the organism. The numbers are about double for adults in Germany and France.
I'm thinking of getting a government grant to go study this in France and Germany.
