HBV DNA PCR Quantitative, Real-Time PCR
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About HBV DNA PCR Quantitative, Real-Time PCR
Chronic hepatitis B is a dynamic infection that involves several phases based on the host's immune response. The inactive carrier state of the infection is associated with undetectable or low levels of HBV DNA and generally has an excellent long-term prognosis. Meanwhile, the immune-active phase is characterized by high HBV replication and infectivity, leading to cirrhosis and cancer over time.
The Hepatitis B virus (HBV) DNA quantitative test measures the amount of HBV DNA (viral load) in a sample, revealing virus burden and replication. The test uses real-time polymerase chain reaction (PCR) to amplify a specific section of HBV DNA. This tells the doctor about the severity of the infection, whether the person is eligible for antiviral therapy, and the possibility of having liver problems. Doctors may also evaluate a patient's response to treatment using this assay.
However, it's important to note that the HBV DNA quantitative test is explicitly performed for people with documented HBV infection and not to diagnose Hepatitis B
What is the HBV DNA PCR Quantitative Test Used For?
The HBV DNA PCR Quantitative test is performed:
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To support the diagnosis of current hepatitis B infection if serological testing are inconclusive
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To know if the patient has active (high HBV DNA levels) or inactive (low or undetectable levels of HBV DNA) chronic hepatitis B infection
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To predict disease progression in chronic hepatitis B patients
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To determine the patient’s eligibility for anti-HBV treatment
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For monitoring treatment response in patients with chronic hepatitis B infection
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To find occult HBV infection in patients who have liver diseases or are on immunosuppression therapy or chemotherapy
Symptoms of Hepatitis B Infection
Symptoms of hepatitis B can range from none to severe liver failure, depending on a person's immune status. Symptoms commonly include
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Fatigue, Nausea & Vomiting
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Pain in the upper right corner of the abdomen
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Loss of appetite
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Dark-colored urine and pale stools
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Yellowing of the skin and Eyes (Jaundice)
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Joint pain
Test preparation
You don't need to prepare priorly to undergo the HBV DNA Quatitative RT-PCR test.
Interpretation of the Test Results
The HBV DNA quantitative test results are often presented in IU/mL and log IU/mL, indicating the level of active HBV viral replication and infectivity. The results should be comprehended in the context of the patient's clinical presentation, exposure history, and risk factors.
The potential interpretation of the results includes:
| Hepatitis B DNA Viral Load Reported Result | Interpretation |
|---|---|
| Not Detected | Hepatitis B virus (HBV) DNA not detected. Does not rule out HBV infection |
| < 10 IU/mL Low | HBV DNA detected. Unable to quantify below this limit of quantification. Positive response to antiviral therapy |
| 10 – 108 IU/mL Moderate | HBV DNA detected within the quantification limit |
| > 108 IU/mL High | Presence of active HBV viral replication. Unable to quantify HBV DNA level above this limit of quantification. Require antiviral therapy |
| Inconclusive | Submit a new sample for testing if clinically indicated |
FAQs on HBV DNA PCR Quantitative, Real-Time PCR
HBV DNA quantitative RT-PCR is used to monitor disease progression and guide treatment in HBV-infected patients. It is indicated for individuals who test positive on initial hepatitis B screening, pregnant women who are HBsAg positive, and patients who may develop resistance to antiviral therapy
Guidelines recommend antiviral therapy to reduce the risk of advanced liver disease. The American Association for the Study of Liver Disease advises treatment when HBV DNA levels exceed 20000 IU/ml, HBeAg is positive, and serum ALT levels are twice the normal value
HBV DNA quantitative RT-PCR results should be interpreted along with clinical symptoms, patient presentation, and other laboratory markers, and always in consultation with a healthcare provider
The window period for HBV PCR testing is typically between 17 and 40 days, during which HBV DNA can be detected before HBsAg appears in the blood
HBV DNA PCR Quantitative, Real-Time PCR
