Introduction & Objective: Toxoplasmosis is one of the most widespread parasitic infections in the human beings and other warm-blooded animals that can cause chronic infection in adults, fatal illness in immunodeficient patients and abortion in pregnant women or congenital abnormalities in fetus. The aim of this study was determination of the prevalence of toxoplasmosis in primigrvida women in Hamadan.

Materials & Methods: In this cross sectional study a total of 576 primigravida women, who admitted to the health centers were selected by cluster random sampling method. Data for epidemiological factors was collected by a questionnaire and serum samples were collected for detection of total antibodies against Toxoplasma gondii. The titer of &ge 1:20 regarded as positive. The relationship between variables analyzed by chi² test.

Results: In this study seroprevalence was 33.5%. Higher seropositivity observed in illiterate subgroup and lower infection rate was found in high school educated subgroup. Our study showed statistically significant relationship between seropositivity and age, fresh and undercooked meat and rate of vegetables consumption (P<0.05). On the other hand, there was not significant relationship between seropositivity and education, having contact with cats and meat, culture and washing vegetables, consuming raw milk and egg (P>0.05).

Conclusion: This study indicated that seropositivity for toxoplasmosis in this area is lower than northern parts and higher than central and eastern parts of Iran. Our study showed that about one-third of individuals were seropositive and because of the importance of toxoplasmosis in primigravida women and immonucompromized patients, health education is necessary for prevention of toxoplasmosis.