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  • Title: [Study on interventional methods and the pattern of maternal-fetal transmission of syphilis during pregnancy].
    Author: Zhang RL, Chen QY, Chen LP, Wang XY, Zhang LP, Xiu XY, Yang N, Bao XZ.
    Journal: Zhonghua Fu Chan Ke Za Zhi; 2007 Jul; 42(7):438-42. PubMed ID: 17961330.
    Abstract:
    OBJECTIVE: To explore the maternal-fetal transmission patterns and interventional methods of syphilis during pregnancy. METHODS: A total of 847 cases of syphilis in pregnancy confirmed by rapid plasma reagin test (RPR) and treponema pallidum hemoagglutination test (TPHA) were treated with procaine benzylpenicillin intramuscular injection, and with erythrocin oral medication if hypersensitive to benzylpenicillin. Eight hundred forty seven cases of syphilis during pregnancy were followed up for pregnancy outcomes. And their newborn babies were tested using the RPR. The newborns with positive results were given intervention and followed up until 24 months after birth. RESULTS: (1) A total of 733 cases among the total 847 have given birth to living-babies, in which 626 cases were tested using RPR, and the positive rate was 55.1% (345/626). (2) The RPR positive rate, neonatal mortality, preterm birth rate and low birth rate in the newborn of mothers with an RPR titer higher than or at 1:8 were higher than those of mothers with an RPR titer lower than 1:8 (P < 0.01). (3) The neonatal RPR positive rate was related to the timing of the treatment of the women. (1) The neonatal RPR positive rate was 22.4% (15/67) for treatment compared with 49.6% (330/666) for non-treatment before pregnancy (P < 0.01). (2) The positive RPR rate of neonates between treatment before pregnancy and treatment during pregnancy was different, being 22.4% (15/67) and 40.3% (240/595) respectively (P < 0.05) (3) In comparison between treatment both in the early pregnancy and in late pregnancy with only treatment in the late pregnancy, the positive RPR rate of neonates was 28.5% (45/158) and 56.9% (95/167) respectively (P < 0.01). In comparison between treatment both in the mid-term pregnancy and in late pregnancy and treatment in only one period in the terminal, the positive RPR rate of neonates was 37.0% (100/270) and 56.9% (95/167) respectively (P < 0.01). CONCLUSIONS: The maternal-fetal transmission rate and perinatal prognosis are related to maternal RPR titer and the timing of maternal treatment. Inborn syphilis can be prevented and cured in fetal time. For neonates with anti-syphilis treatment in protestation, RPR positive rate is significantly lower than that without treatment in protestation. Treatment prior to pregnancy is a powerful measure to prevent the maternal-fetal transmission of syphilis.
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