**4. Conclusion**

The question that *Toxoplasma* infection could be the etiological cause psychological diseases and behavioral disorders is still under study. Recent studies try to prove this relationship. Study of Lindgren and collaborators demonstrated a significant association between *T. gondii* seropositivity and psychotic symptoms [76]. Vlatkovic and collaborators find an increased prevalence of *T. gondii* infection in a patient with Schizophrenia [77]. So, increased risk of developing toxoplasmosis infection prior to the onset of Schizophrenia was reported in several epidemiological, neurobiological and parasitological studies. One day this association will be a new method of diagnosis, treatment, and prevention of development of Schizophrenia. Therefore, health education on personal and nutritional hygiene given to patients and healthy people, especially early age, can help reduce the risk of contact with infectious agents and subsequently could decrease the incidence of behavior disorders.
