Hepatitis B virus (HBV) infection is a major public health problem in many countries, with
nearly 300 million people worldwide carrying HBV chronic infection and over 1 million …

Hepatitis outbreaks in hemodialysis (HD) patients and staff were reported in the late 1960s,
and a number of hepatotropic viruses transmitted by blood and other body fluids have been …

BACKGROUND & AIMS: Occult HBV infection (OBI) is defined by the presence of HBV DNA
in the liver and/or serum and negative HBsAg testing. Since the implementation of highly …

Objective To investigate the prevalence of occult HBV infection (OBI) among children and to
characterize virology of occult HBV, we conducted an epidemiological survey. Methods 186 …

Failure to neutralize HBsAg and subsequent escape from the host immune system may be
caused by HBsAg mutations, particularly in the" a" determinant, which alters the antigenicity …

Background Occult hepatitis B virus infection (OBI) is a well-recognized clinical entity
characterized by the detection of HBV DNA in serum and/or liver in the absence of …

Mutations of HBsAg especially within the “a” determinant could alter the antigenicity of the
protein causing failure of HBsAg neutralization and escaping from the host's immune …

Occult hepatitis B is characterized by the absence of hepatitis B surface antigen (HBsAg) but
the presence of HBV DNA. Because diagnosis of hepatitis B virus (HBV) typically includes …

Characterization of Occult Hepatitis B Infection Among Injecting Drug Users in Tehran, Iran -
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Hemodialysis patients potentially have an increased risk of infection with parenterally
transmitted viral agents due to an impaired host immune response and multiple transfusion …