Over the past few decades, scientists investigating what causes schizophrenia have come up with a slew of environmental risk factors, from a mother's socioeconomic status, to a father's old age, and the season in which the baby is conceived.Now there's a new culprit to add to the list: toxoplasmosis.At least, that's the hypothesis of one English research team. Glenn McConkey and his colleagues at the University of Leeds say that the tiny Toxoplasma gondii — a microorganism commonly found on unwashed vegetables and undercooked meat — may be able to infect the brain and ultimately cause schizophrenia.Read more at...SFARI, March 2009.