Abstract

Background: Occult hepatitis C virus infection (OCI) is recognized by finding hepatitis C virus (HCV) RNA in hepatocytes without detectable anti-HCV antibodies and viral RNA in plasma. Autoimmune hepatitis (AIH) is a chronic and generally progressive disease without exactly-identified etiology. Objectives: This study aimed to determine the prevalence of OCI among patients with A1H and to evaluate the tests used to rule out HCV infection in d iagnosing AIH. Patients and Methods: Between July 2012 to February 2013, 35 Iranian patients with AIH who attended Tehran Hepatitis Center were investigated. For identifying OCI, detection of HCV RNA in both ultracentrifuged serum samples and peripheral blood mononuclear cells (PBMCs) was used. Data analysis was performed using SPSS. Results: Six males and 29 females with mean disease duration of 77.1 39.5 month and mean age 0143.62 12.67years were investigated. All cases were negative for anti-HCV antibody and we could not find any HCV RNA in ultracentrifuged serum samples and PBMCs. Conclusions: With our laboratorydiagnostic method, it seems that thereare no cases ofOCI in patients withAIH. However, we recommend further studies with more samples and more precise laboratory method.