Seroprevalence and sources of Toxoplasma infection among indigenous and immigrant pregnant women in Taiwan.

Investigation on seroprevalence and risk factors of Toxoplasma gondii infections among indigenous and immigrant pregnant women in Mid-Taiwan showed that anti Taxoplasma-specific IgG antibody counts were significantly higher in indigenes (40.6%) than in immigrants (18.2%), with an odds ratio of OR=3.34 (95% CI: 1.93-4.80). The titre of Taxoplasma-specific IgG was also significantly higher in indigenes than in immigrants (P<0.001). Differences of living styles for Toxoplasma infection between the two groups were drinking untreated water (OR=2.34, 95% CI: 1.36-4.02), consumption of raw/undercooked meats (OR=10.11 95% CI: 4.92-20.78), especially raw/undercooked pork (P=0.000), or raw/undercooked viscera (OR=9.16, 95% CI: 2.97-27.94), contact with cats (OR=5.69, 95% CI: 2.83-11.47), or soil (OR=2.55 95% CI: 1.72-3.80). Differences of risk factors for Toxoplasma infection in terms of positive IgG in the two groups were consumption of raw/undercooked meats (P=0.005) especially raw/undercooked pork (P=0.004), and contact with cats (P=0.013) or soil (P=0.028). It is concluded that seroprevalence of Toxoplasma infection is higher in indigenous pregnant women and related to their living styles. To prevent congenital toxoplasmosis, health education seems required.