Contrary to Study Findings, Owning a Cat Does Not Increase Risk of Schizophrenia, Research Shows


In a recent study, researchers have suggested that owning a cat may double the risk of developing schizophrenia. The proposed mechanism for this link is the presence of the parasite Toxoplasma gondii, which can be found in cats. However, it’s important to understand the nuances of this research and not jump to conclusions without further investigation.

The Link to T. gondii

Previous research has indeed found a higher prevalence of T. gondii infection in individuals with schizophrenia. This has led researchers to explore the potential role of cat ownership as a risk factor. Some studies have even found a correlation between early-life exposure to cats and a higher risk of schizophrenia.

Quality of Studies

It’s worth noting that the quality of the studies examining the link between cat ownership and schizophrenia varies. Some studies have been deemed low-quality and potentially biased. On the other hand, higher-quality studies have not found a strong association between cat ownership and schizophrenia.

The Need for Further Research

To fully understand the potential risk-modifying factor of cat ownership on mental disorders, more high-quality studies are needed. It is crucial not to be overly concerned about the potential link between owning a cat and developing schizophrenia without further research.

Exploring the Benefits of Semaglutide

In other ongoing research, scientists are exploring the potential benefits of semaglutide, a chemical found in weight-loss drugs, for alcohol and substance use disorders. While this is unrelated to the cat ownership and schizophrenia discussion, it shows the wide range of studies being conducted to better understand mental health.

The University of Queensland Study

The recently conducted study by the University of Queensland examined 17 high-quality studies from 11 countries over a span of 44 years. This comprehensive analysis sheds light on the potential risk associated with cat ownership and T. gondii infection.

The Role of T. Gondii Parasites

T. gondii parasites can enter the Central Nervous System and affect neurotransmitters in the brain, potentially contributing to the development of schizophrenia. It’s important to note that the parasites enter the body through a cat’s bite.

A Contradictory Study

In one contradictory study, initially, no association between cat ownership and schizophrenia was found. However, upon further examination, the study acknowledged missing cat bites in its research. This highlights the need for thorough investigation when studying potential risk factors.

The Prevalence of Schizophrenia

Schizophrenia affects approximately 1.2% of the US population, which translates to around 3.2 million people. While the potential link between cat ownership and schizophrenia is intriguing, further research is necessary to establish a definitive connection.


While the recent study suggests a potential link between cat ownership and schizophrenia, it’s important to approach the findings with caution. The level of association found in previous studies varies, and more high-quality research is needed to fully understand the impact of cat ownership on mental health. Until then, it is premature to be overly concerned about the potential risk.

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