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Pan, Calvin Q; Zou, Huai-Bin; Chen, Yu; Zhang, Xiaohui; Zhang, Hua; Li, Jie; Duan, Zhongping
Clinical gastroenterology and hepatology, 10/2013, Letnik: 11, Številka: 10Journal Article
Despite appropriate passive and active immunization, perinatal transmission of hepatitis B virus (HBV) still occurs in 5%-10% of infants born to women with high levels of viremia who test positive for the hepatitis B e antigen (HBeAg). We evaluated the effects of cesarean section delivery on perinatal transmission of HBV from women who tested positive for the hepatitis B surface antigen (HBsAg). We analyzed data from 1409 infants born to HBsAg-positive mothers through vaginal delivery (VD) (n = 673), elective caesarean section (ECS) (n = 496), or urgent cesarean section (UCS) (n = 240) who completed appropriate immunization against HBV. The prevention was assumed to have failed for infants who were HBsAg positive when they were 7-12 months old; this information was used to assess transmission rates. HBV infection was transmitted to a smaller percentage of infants born by ECS (1.4%) than by VD (3.4%, P < .032) or UCS (4.2%, P < .020). UCS had no effect on vertical transmission, compared with VD (4.2% vs 3.4%, P = .593). Infants born by ECS had a significantly lower rate of vertical transmission than those born by non-ECS (1.4% vs 3.6%, P = .017). Women with HBV DNA levels <1,000,000 copies/mL did not transmit the infection to their infants, regardless of method of delivery. There were no differences in maternal or infant morbidity and mortality among the groups. There is a significantly lower rate of vertical transmission of HBV infection to infants delivered by ECS, compared with those delivered vaginally or by UCS. Elective cesarean sections for HBeAg-positive mothers with pre-delivery levels of HBV DNA ≥1,000,000 copies/mL could reduce vertical transmission.
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in: SICRIS
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