Toxoplasma gondii has many harmful effects on human body, especially when pregnant women are infected with Toxoplasma gondii, it will have a direct impact on the growth and development of the fetus; if their immune function is impaired, the infection can also cause meningitis. If a pregnant woman is infected with Toxoplasma gondii, it will not only cause her skin lesions, gastrointestinal tract lesions and other damages, but will also have a greater impact on the fetus, which may lead to fetal deformities, miscarriages, etc. Even if the fetus survives, it may not be able to survive. Even if the fetus survives, it may suffer from developmental defects such as mental retardation and visual impairment. People with impaired immune function can develop acquired toxoplasmosis, with symptoms such as enlarged lymph nodes, fever, vomiting, etc. In addition, there may be central nervous system abnormalities such as meningitis and hydrocephalus. Toxoplasma gondii is mainly parasitized on cats, dogs and other pets, and can invade the human body through the digestive system, so it is recommended to keep a distance from pets and avoid close contact with their feces; symptoms must be treated as soon as possible, so as not to delay the condition.