Toxoplasmosis can also cause of premature births:
http://phys.org/news/2010-10-prenatal-treatment-congenital-toxoplasmosis-brain.html
There is also a correlation with schizophrenia.
http://medicalxpress.com/news/2012-04-links-strains-common-parasite-severe.html
The infection rate in the UK population is only 7% whereas 61% are infected in Brazil. The strain in Brazil is slightly different and possibly causes worse symptoms in the infected person.
The US rate is 25% - - coincidentally the same percentage that is hardcore left. Not saying there’s a connection but it would be extremely interesting to see a study examine what the makeup of that 25% in the US is in terms of Democrat vs. Republican party affiliation.