(CNN) -- A new study shows that a parasite in cat feces cat owners having less fear. It is also linked to an increase in risk taking behaviors among entrepreneurs.
Humans can be infected with the toxoplasma parasite through direct contact with cat feces or things that have already been contaminated.
Toxoplasma lives in the brain and those infected might feel flu like symptoms.
The study estimates that two billion people around the world have been infected by the parasite.
Pregnant woman have been warned for years to stay away from cat litter, because they would risk the unborn child getting the parasite.
The parasite has also been associated with road rage incidents, schizophrenia, and even suicide, but more experiments are expected to be done.