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In the search for schizophrenia’s cause, these researchers focus on a parasite spread by cats

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Genes. Environment. Brain structure and chemistry... The causes of schizophrenia are far from simple. As scientists explore the causes of the devastating mental illness, some are focusing on the interplay between genes and the environment. Viruses are part of that environment -- and that brings us to cats.

Or rather, cat feces and the parasite Toxoplasma gondii.

This Baltimore Sun story, Researchers explore link between schizophrenia, cat parasite, explains the possible connection.

It notes that other researchers are exploring the likelihood that flu and herpes viruses could be triggers, and it quotes Dr. Ken Duckworth, medical director for the National Alliance on Mental Illnesses, as saying: “There’s so much we don’t know about schizophrenia that anybody paying attention would welcome any thoughtful inquiry. And the infectious disease corner of the field is a growth stock right now,” he said. “If true, it would have a preventive implication which is profound.”

Here’s more information on schizophrenia -- an explanation, the symptoms, treatment, etc. -- from the National Institute of Mental Health. The “What causes schizophrenia?” section explores the genetic links, then states:

“In addition, it probably takes more than genes to cause the disorder. Scientists think interactions between genes and the environment are necessary for schizophrenia to develop. Many environmental factors may be involved, such as exposure to viruses or malnutrition before birth, problems during birth, and other not-yet-known psychosocial factors.”

And here’s a look at the research on toxoplasmosis and schizophrenia, from the Stanley Medical Research Institute, which focuses on the causes and treatment of schizophrenia and bipolar disorder.

For a reminder of how devastating the illness can be, there’s Jani’s at the mercy of her mind, from Times staff writer Shari Roan. And the follow-up story, Hushing the intruders in her brain.

-- Tami Dennis

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