Invasive Species Compendium

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Abstract

Difference of Toxoplasma gondii antibodies between Thai and Austrian pregnant women.

Abstract

Toxoplasma gondii IgG and IgM antibodies were compared in pregnant women from Thailand and Austria, using the Sabin-Feldman dye test and ISAGA-IgM in the same laboratory. In Thai pregnant women, IgG antibody was present in 21.7% and titres were mostly low; all Thai women were negative for IgM antibody. Conversely, in Austrian pregnant women, IgG antibody was present in 30.0% with a high titre, and 19 (6.3%) cases were positive for IgM antibody. The seropositivity of T. gondii IgG antibody in Austrian women was significantly higher than in Thai women (P=0.02) and the titres were much higher. The data may be explained if Thai women become infected at a younger age than Austrian women and so are in the chronic stage of infection with the corresponding lack of IgM antibody during pregnancy, and/or differences in the virulence of T. gondii strains in different parts of the world.