Also, the OR of the risk of anti- T. gondii IgM in Iranian schizophrenia and depression patients compared to the control group was 1.54 (95% CI; 0.9–2.64) and 1.03 (95% CI: 0.2–5.24), respectively, which are not statistically significant. The gene discussed is CD40LG; the disease is schizophrenia.