Study on the Prevalence of Occult Hepatitis B Virus Infection in Patients Undergoing Hemodialysis
Occult hepatitis B (OBI) is a major challenging clinical entity characterized by the absence of hepatitis B surface antigen (HBsAg). The persistence of OBI may progress to fibrosis, cirrhosis, and hepatocellular carcinoma. This study was aimed to investigate the prevalence of OBI among HD patients. In the present cross-sectional study, 89 sera samples of hemodialysis individuals were tested for HBsAg and HBc-IgG by Enzyme-linked Immunosorbent Assay (ELISA). In addition, the HBV DNA has tested in sera and peripheral blood mononuclear cell (PBMC) samples by nested-PCR. Out of 89 patients, 51(57.3%) were males, and 38 (42.7%) females. The ages ranged from 24 to 90 years (with a mean of 57.5±1.37 years). All the sera samples had normal levels of Aspartate Aminotransferase (AST) and Alanine Transaminase (ALT) but had high levels of Creatinine (Cr) (6.9±2.17) and Blood Urea Nitrogen (BUN) (61.83±2.03). 2/89 (2.2%) sera samples were positive for both HBsAg and HBc-IgG test; in addition, HBV DNA was detected in both sera and their PBMC samples. The sera of 15/89 (16.85%) were only positive for the HBc-IgG test, including 10/51 (19.6%) males and 5/38 (13.2%) females (P=0.5). The high 16.85% prevalence OBI has been found among HD patients. To manage OBI infection, screening of HBV DNA should be implemented for HD patients by sensitive molecular means such as nested-PCR and real-time PCR.
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