What does it mean to be HBeAg positive?
The hepatitis e antigen, or HBeAg, is a marker of an actively replicating HBV virus infection. Those with a positive HBeAg have active replication in their liver cells, more of the virus circulating in their blood, and as a result, they are more infectious, with a higher likelihood of transmitting HBV to others.
How does HBV reactivate?
Reactivation of hepatitis B refers to the abrupt increase in hepatitis B virus (HBV) replication in a patient with inactive or resolved hepatitis B. Reactivation can occur spontaneously, but more typically is triggered by immunosuppressive therapy of cancer, autoimmune disease, or organ transplantation.
What is window period for hepatitis B?
Two periods may be referred to as window period in hepatitis B infection: (1) the period that elapses during HBsAg to HBsAb seroconversion, i.e. between the disappearance of surface antigen (HBsAg) from serum and the appearance of HBsAb (anti-HBs), and. (2) the period between infection and appearance of HBsAg.
What is the difference between HBsAg and HBeAg?
Hepatitis B e antigen (HBeAg) is a small polypeptide that exists in a free form in the serum of individuals during the early phase of hepatitis B infection, soon after hepatitis B surface antigen (HBsAg) becomes detectable. Serum levels of both HBeAg and HBsAg rise rapidly during the period of viral replication.
What is the normal range of HBeAg?
For example, a hepatitis B surface antigen (HBsAg) level of less than 1 s/c is considered negative, while a level of more than 5 s/c is considered positive. Any value between 1 and 5 s/c is indeterminate and should be repeated.
Can inactive hepatitis B become active?
The inactive carrier state may for a lifetime, but a proportion of patients may undergo subsequent spontaneous or immunosuppressioninduced reactivation of HBV replication with reappearance of high levels of HBV DNA with or without HBeAg seroreversion and a rise in ALT levels [3].
Is seroconversion the same as window period?
HIV seroconversion, specifically, is the time from HIV exposure, to infection, and to developing antibodies that can be detected by a test. This can take a few weeks and is sometimes called the window period.
What is HBV seroconversion?
HBeAg seroconversion occurs when people infected with the HBeAg-positive form of the virus develop antibodies against the ‘e’ antigen. The seroconverted disease state is referred to as the ‘inactive HBV carrier state’ when HBeAg has been cleared, anti-HBe is present and HBV DNA is undetectable or less than 2000 IU/ml.
Why is HBeAg test done?
Therefore, the HBeAg test is most often used to indicate the level of contagiousness. It is also useful in monitoring the efficacy of a treatment. A positive (reactive) HBeAg result combined with a negative (non-reactive) anti-HBe result confirms a high degree of contagiousness.
