Seroepidemiology of toxoplasmosis in childbearing women of Northwest Iran.

Toxoplasma gondii causes the most common parasitic infection in the world. Congenital transmission, prenatal mortality and abortion are major problems of T. gondii. Prevalence of toxoplasmosis is high in Iran, especially in Azerbaijan. The current literature reviewed in this paper reveal results pertaining to various regions of Iran. The present cross-sectional e-study was designed to evaluate the seroprevalence of toxoplasmosis in childbearing women in Northwest Iran. We evaluated 1659 women in childbearing age from several cities in Northwestern Iran (Tabriz, Maragheh, Ahar, Marand, Sarab, Miane) from July 2009 to August 2010. Women aged between 20 and 40 years and seeking prenatal care were enrolled in the study. The subjects' sera were probed with indirect fluorescent antibody (IFA). A total of 1659 subjects were examined. Titres ranged from 1:100 to 1:800. In all, 899 subjects (54.13%) were seropositive. The highest frequency of seropositivity was shown in 1:200 dilution (36.08%) and in subjects from Maragheh (84% of 211 subjects). There was a direct linear relationship between seropositivity and age (p 0.001). Also, seroprevalence of toxoplasmosis was higher in subjects with primary school/lower educational level (p 0.001) and subjects living in rural regions (p 0.001). Overall, more than 50% of women in childbearing age were seropositive for toxoplasmosis in northwestern Iran. Increasing seroprevalence of toxoplasmosis with age was a predictable result due to longer exposure to the parasite. The relationship between increasing seroprevalence and lower educational level as well as living in rural areas is in line with the latest epidemiological findings, which also show such relationships due to lower socioeconomic status.