Cases of blindness and fetal malformations caused by owning cats are clinically uncommon, but for those who know a little bit about toxoplasmosis, these are the results triggered by toxoplasmosis, which is serious but not uncommon. Recently, however, scientists have discovered that toxoplasmosis may also increase the risk of mental disorders, particularly schizophrenia, which toxoplasmosis would double. Toxoplasmosis is caused by Toxoplasma gondii infection, which occurs in humans primarily through contact with animal feces. The CDC predicts that approximately 60 million people in the United States are infected with Toxoplasma gondii, the vast majority of whom are latently infected and do not exhibit any symptoms. The majority of these people do not show any symptoms. In the population, immunocompetent people usually show acute lymphadenitis (90%), while immunodeficient people show generalized flu-like symptoms, such as muscle aches and pains, enlarged lymph nodes, and in severe cases, the brain, lungs, liver, and eyes can be involved, causing blindness. In addition, infection in pregnant women can lead to embryonic malformations. But now, more and more studies are also linking this parasitic disease to schizophrenia. in 2014, the University of Pennsylvania School of Medicine found that 21.4 percent of schizophrenics are linked to Toxoplasma infections, and that if steps were taken to block Toxoplasma infections altogether, it would reduce the number of cases of schizophrenia by one-fifth. And recently, the Neurovirology Laboratory at Johns Hopkins University found that among people who had cats in their homes as children, there was a greater risk of schizophrenia in adulthood. Meanwhile, a large Meta-analysis from the Netherlands said that people infected with Toxoplasma gondii have twice the risk of developing schizophrenia as normal people. In addition, infected people are more likely to develop bipolar disorder, drug addiction, and other conditions.