FIG. 1.

Detection of IgG antibody by Western blotting with purified whole-cell proteins of SARS-CoV and by IFA against SARS-CoV in maternal blood, umbilical blood, and amniotic fluid. (A) Western blot. (B) IFA. Lanes: M, molecular standard weight marker of proteins; 1, positive control; 2, negative control; 3, maternal blood; 4, umbilical blood; 5, amniotic fluid. The serum specimens from a clinically diagnosed probable SARS patient and a healthy individual were used as positive and negative controls, respectively, which were confirmed by the methods of ELISA, IFA, and Western blotting.