Abstract
Infection with hepatitis B virus (HBV) shows variable clinical manifestations ranging from asymptomatic carrier state, acute, chronic, fulminant, and occult HBV infection (OBI). OBI is defined as the presence of HBV viral DNA in the liver (with or without detectable HBV DNA in serum) of hepatitis B surface antigen-negative individuals tested with the currently available assays. A cutoff of HBV DNA if present is expected to be <200 IU/ml. As high as 20% of individuals with OBI carriage evidenced by HBV DNA detection could be nonreactive for anti-hepatitis B core or any other serological evidence of exposure to HBV. With a reported prevalence of 5.4% among blood donors in Ile Ife, Nigeria, OBI is a risk factor for chronic liver disease and hepatocellular carcinoma. Given the sensitivity of our diagnostic tools in this environment, it is likely that most cases of OBI are going undiagnosed among many blood donors. We present a case of fulminant hepatitis with negative serological markers for viral hepatitis in a 25-year-old male.
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