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ELISA results with rP35 protein in the sera from 41 pregnant women with serologic profile consistent with recently acquired infection with T. gondii (group I) after subtraction of the results of the same sera with the CKS control preparation. The horizontal lines represent the cutoff values of 0.014 (mean plus two standard deviations) and 0.019 (mean plus three standard deviations) obtained from the results noted with sera of group II individuals as described in Results.
