Toxoplasmosis linked to schizophrenia

Scientists from the UK's University of Leeds have shown that the toxoplasmosis parasite may play a role in the development of bipolar  disorders by affecting the production of dopamine - the chemical that  relays messages in the brain controlling aspects of movement, cognition  and behavior.

Toxoplasmosis, which is transmitted via cat feces and raw or undercooked  infected meat, is relatively common, with 10%-20% of the UK population  and 22% of that in the USA estimated to carry the parasite as cysts.  Most people carrying it are healthy, but for those who are  immune-suppressed - and particularly for pregnant women - there are  significant health risks that can occasionally be fatal.