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2015-07-06Zeitschriftenartikel DOI: 10.1371/journal.pone.0131912
Occult Hepatitis B Virus Infection in Nigerian Blood Donors and Hepatitis B Virus Transmission Risks
Oluyinka, Opaleye O.
Tong, Hoang Van
Tien, Sy Bui
Fagbami, Ademola H.
Adekanle, Olusegun
Ojurongbe, Olusola
Bock, Thomas
Kremsner, Peter G.
Velavan, Thirumalaisamy P.
Background: Occult hepatitis B virus infection (OBI) characterized by the absence of detectable HBsAg remains a potential threat in blood safety. We investigated the actual prevalence, viral factors and genotype of OBI infections in Nigerian blood donors. Methods: Serum collected from two blood banks were reconfirmed as HBsAg seronegative by ELISA. Forty HBsAg positive samples were employed as controls. HBV-DNA was amplified from all donors and viral loads were determined using quantitative real-time PCR. Antibodies to the HBV core, surface and HBe antigen (anti-HBc,anti-HBs,HBeAg) were measured. The PreS/S and PreC/C regions of the HBV genome were sequenced. Results: Of the 429 blood donors, 72(17%) were confirmed as OBI by DNA detection in different reference labs and excluded the concern of possible contamination. Of the 72 OBI samples, 48(67%) were positive for anti-HBc, 25(35%) positive for anti-HBs, and 2(3%) positive for HBeAg. Of the 72 OBI samples, 31(43%) were seropositive for either anti-HBc, anti-HBs or HBeAg, 21 (30%) positive for both anti-HBc and anti-HBs,one positive for both anti-HBc and HBeAg. None of the OBI samples were positive for all three serological markers. The viral load was
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DOI
10.1371/journal.pone.0131912
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https://doi.org/10.1371/journal.pone.0131912
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<a href="https://doi.org/10.1371/journal.pone.0131912">https://doi.org/10.1371/journal.pone.0131912</a>