[Study on risk factors of 292 pregnant women infected with HCMV].

This paper is to determine the risk factors of reactivation by HCMV during pregnancy for improving child birth and bringing-up. A total of 292 paired sera were collected from mothers and their infants in Shanghai and were tested for IgG and IgM by ELISA. The positive rates of HCMV IgG and IgM were 98.97%, 96.97% and 3.77%, 1.71%, respectively in mothers and infants. The rate of IgM was 1.49% in infants whose mothers' education were above the high school level, whereas it was 4.17% whose mothers' educational degree was lower than that grade, and the relative ratio (RR) was 2.8. The number of previous pregnancies were closely associated with the positive rate of IgM. In infants born to mothers at first pregnancy, the positive rate was 1.96%, whereas in infants born to mothers at third pregnancy it increased to 3.70%, RR was 1.89. In pregnant women who were known to have postmortem or premature deliveries before the positive rate was 9.09%, whereas it was 2.53% in pregnant women at first pregnancy, the RR was 3.59. The rates of their infants were 3.03% and 1.90%, respectively, the RR was 1.59. The frequency of IgM antibody in 292 sera of mothers was correlated with that in their infants. It showed that HCMV might be transmitted from mother to fetus.