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Scientists Suspect Link Between Cat Feces, Female Suicide

By AFP News    July 05, 2012 / (2) comments

WASHINGTON - Women infected with a parasite spread by cat feces run a higher risk of attempting suicide, suggests a study of more than 45,000 women in Denmark published in a scientific journal this week.

"We can't say with certainty that T. gondii caused the women to try to kill themselves," said Teodor Postolache of the University of Maryland medical school, senior author of the study in the Archives of General Psychiatry. "But we did find a predictive association between the infection and suicide attempts later in life that warrants additional studies. We plan to continue our research into this possible connection."

About one in three people in the world are believed to be infected with Toxoplasma gondii, which has been linked to schizophrenia and behavior changes, but often produces no symptoms as it lurks in brain and muscle cells.

Human run the risk of infection when they clean out their cats' litter boxes, as well as by consuming unwashed vegetables, undercooked or raw meat, or water from a contaminated source.

"The study found that women infected with T. gondii were one-and-a-half times more likely to attempt suicide compared to those who were not infected, and the risk seemed to rise with increasing levels of the T. gondii antibodies," a summary of the findings said.

"Previous mental illness did not appear to significantly alter these findings. The relative risk was even higher for violent suicide attempts."

The suspected perils of T. gondii featured in The Atlantic magazine in March this year when it ran a widely-read profile of Czech biologist Jaroslav Flegr, who suspects the parasite of literally changing people's minds.

It headlined the article: "How Your Cat is Making You Crazy."


Image: Onur ERSIN / via Shutterstock

Source: AFP

Comments  2

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  • Science
    07/05/2012 11:05pm

    I'd really like to read about the science behind this. What do the researchers think T. gondii is doing to people's brains and why does it affect only women? Or did they not study suicide attempts of men who clean litter boxes?

  • misleading headlines
    07/06/2012 02:37pm

    The headline is a marketing ploy! Few people read the entire article AND no one reads the actual study.

    The fact is people are most likely to get toxo from touching raw vegetables or consuming raw or undercooked meat.

    Peter Wolf of Vox Felina wrote an excellent summary.

    Peter delves into the actual study.
    According to the scientist, the risk of suicide is very small. Furthermore
    “T. gondii infection is likely not a random event and it is conceivable that the results could be alternatively explained by people with psychiatric disturbances having a higher risk of becoming T. gondii infected prior to contact with the health system.” [2]

    In other words, it’s possible that mental illness is a risk factor for T. gondii infection, rather than the other way around.

    I don't anyone know who touches cat feces. We all use scoopers. But many people do touch raw vegetables.
    Wearing gloves when cleaning cat litter is a smart step for pregnant women and washing hands regularly is another preventative measure.

    I abhor it when journalism uses shady advertising tactics.