[Occurrence of Toxoplasma gondii antibodies in the population of Split-Dalmatia County].

The prevalence of antibodies reactive with Toxoplasma gondii in the population of the Split-Dalmatia county (southern Croatia) was investigated by enzyme linked immunosorbent assay (ELISA). Of a total of 1464 serum samples collected from persons aged 2-84 years 36.4% reacted with Toxoplasma gondii. The frequency of positive sera increased significantly with age (p < 0.001). Prevalence of specific antibodies to T. gondii does not vary significantly according to gender, except, among children younger than 10 years (boys 14.0%; girls 28.2%; p < 0.01). Of a total of 398 pregnant women tested 31.4% were seropositive. According to increase in seroprevalence among the pregnant women of different age the theoretical incidence of congenital toxoplasmosis was calculated.