How to detect whether the human body is infected with Toxoplasma gondii. Serological testing: Serological testing is currently the most commonly used method to detect Toxoplasma gondii infection. It mainly determines whether the patient is infected by detecting anti-Toxoplasma antibodies in the blood. These include ELISA tests in serology laboratories, fluorescent antibody tests, etc. This detection method is more accurate, but requires multiple sampling tests to determine the result of infection. Molecular biology testing: Molecular biology testing mainly uses PCR technology to detect Toxoplasma gondii D in blood, urine and other body fluids of patients.