The aim of this study was to determine seroprevalence of and risk factors for Toxoplasma gondii among
pregnant women in Karaj township of Alborz province by ELISA method. The blood samples were taken
from 400 pregnant women referred to the health centers of Karaj township. IgM and IgG titers and
effects of some factors on incidence of the disease were appraised. Anti Toxoplasma IgM and IgG were
positive in 1% and 29% respectively. Seropositive subjects were more frequently seen in women with
age >30 years compared to younger women. No significant relationship was found among the
seroprevalence of T. gondii infection and level of education, residence area, history of abortion and
gestational age. According to the positive cases between the patients, there should be some regular screen
programs to recognize the chronic and acute infections especially in pregnant women.