A Journal Schizophrenia Research-published research has bad news for cat lovers. As per the research, there can be an association between childhood cat ownership and increased risk of developing schizophrenia and other mental illnesses later in life.

The researchers said cats can carry a parasite known as Toxoplasma gondii. This parasite comes out from their bodies through their feces. Humans can be at risk if they come in contact with feces, like while clearing their litter boxes.

The parasite can also be found in undercooked meats, unwashed fruits and vegetables. Researchers from the Stanley Medical Research Institute have reviewed two earlier studies showing link between childhood cat ownership and increased risk of mental illness.

Using a questionnaire made by the National Alliance for the Mentally Ill (NAMI), the researchers reproduced the studies. The results matched those of previous studies.

Study researchers said, "Cat ownership in childhood has now been reported in three studies to be significantly more common in families in which the child is later diagnosed with schizophrenia or another serious mental illness".

People who are having toxoplasmosis are generally not aware that they are infected. The symptoms can include flu-like symptoms, muscle pain, swollen lymph glands. Chronic situation can damage brain, eyes and other internal organs.

Situation is especially problematic for those who have compromised immune systems and pregnant women, as they risk passing on to their newborns.