T. gondii-specific IgG antibodies in 32 pregnant women treated with spiramycin from the time of diagnosis until delivery and in 16 nonpregnant patients with acute T. gondii infection and not receiving any treatment. 0, time of diagnosis; 1, 2, and 3, trimesters of pregnancy. Toxoplasma gondii-specific IgG antibodies (log IU/ml) tested with the Liaison assay (Diasorin, Saluggia, Italy) (a) and the enzyme-linked fluorescent assay (bioMérieux, Marcy l'Etoile, France) (b). T. gondii-specific IgG AI (log A.I.) measured with the Liaison assay (Diasorin, Saluggia, Italy) (c) and the Vidas assay (bioMérieux, Marcy l'Etoile, France) (d).