Hayashida A, Inaba N, Oshima K, Nishikawa M, Shoda A, Hayashida S, Negishi M, Inaba F, Inaba M, Fukasawa I, Watanabe H, Takamizawa H. Re-evaluation of the true rate of hepatitis C virus mother-to-child transmission and its novel risk factors based on our two prospective studies.
J Obstet Gynaecol Res 2007;
33:417-22. [PMID:
17688606 DOI:
10.1111/j.1447-0756.2007.00582.x]
[Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
OBJECTIVE
To re-evaluate the true hepatitis C virus (HCV) mother-to-child transmission (MTCT) rate and its novel risk factors.
STUDY DESIGN
A comparative study based on our own two prospective studies done during the two periods, 'early' (1989-1994) and 'recent' (1995-2004).
RESULTS
All carrier infants became HCV RNA-positive within 3 months after birth. The MTCT and de-carrier rates were, respectively, higher (14.2%) and lower (16.7%) in the recent period, although liver dysfunction of carrier infants was found very frequently (66.7%) in both groups. MTCT occurred significantly when the maternal viral load, serum alanine aminotransferase (sALT) levels and blood loss at delivery were, respectively, more than 10(5) copies/mL, 110 IU/L, and 500 g. No MTCT was found when elective cesarean section was done.
CONCLUSIONS
The true HCV MTCT and de-carrier rates were found to be much higher and lower than those reported previously. The maternal liver dysfunction (sALT >or=110 IU/mL) and blood loss (>or=500 g) at delivery are the next risk factors to maternal viral load (>or=10(5) copies/mL) for MTCT.
Collapse