Hepatitis D Infection Blood Test

What is Hepatitis D infection?

Hepatitis D infection is a serious liver disease that only occurs in people already infected with Hepatitis B. It is caused by the Hepatitis D virus (HDV), which requires the Hepatitis B virus to replicate and spread. The Hepatitis B Core Antibody IgM test is the most important test for diagnosis because it identifies recent Hepatitis B infection patterns that indicate co-infection or superinfection with Hepatitis D.

RECOMMENDED TEST Hep B Core Antibody, IgM
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What causes Hepatitis D infection?

Hepatitis D infection is caused by the Hepatitis D virus (HDV), a defective RNA virus that can only replicate in the presence of Hepatitis B virus (HBV). HDV spreads through contact with infected blood or bodily fluids, including through needle sharing, sexual contact, or from mother to baby during childbirth. The virus attacks liver cells and can occur in two patterns: co-infection when someone gets both Hepatitis B and D at the same time, or superinfection when someone with chronic Hepatitis B gets infected with Hepatitis D later.

What is the best test for Hepatitis D infection?

The Hepatitis B Core Antibody IgM test is the most important test for Hepatitis D infection because it detects recent or acute Hepatitis B infection, which is essential since Hepatitis D cannot exist without Hepatitis B. This test identifies IgM antibodies against the Hepatitis B core antigen, helping determine whether you have a co-infection with both viruses simultaneously or a superinfection where Hepatitis D has been added to an existing chronic Hepatitis B infection. Additional testing for Hepatitis D antibodies (anti-HDV) and HDV RNA may be ordered by your doctor if Hepatitis B markers are positive, but the Hepatitis B Core Antibody IgM test provides the critical foundation for understanding your infection status.

When should I get tested for Hepatitis D infection?

You should get tested if you have chronic Hepatitis B infection and develop worsening liver symptoms like jaundice, fatigue, or abdominal pain. Testing is also important if you have risk factors for Hepatitis B exposure including injection drug use, unsafe sexual practices, or living in areas where Hepatitis D is common like parts of Eastern Europe, the Mediterranean, or the Amazon basin. Anyone with Hepatitis B who experiences sudden deterioration in liver function or develops acute hepatitis symptoms should be tested immediately, as Hepatitis D superinfection can rapidly progress to severe liver disease.

What are the symptoms of Hepatitis D infection?
Symptoms of Hepatitis D infection include jaundice with yellowing of the skin and eyes, severe fatigue and weakness, dark-colored urine, and pain in the upper right abdomen. You might notice loss of appetite, nausea, vomiting, joint pain, and confusion or mental changes in severe cases. Many people with co-infection experience acute symptoms similar to severe Hepatitis B, while those with superinfection often have a sudden worsening of existing liver disease symptoms. Some individuals may be asymptomatic initially, making regular testing important if you have Hepatitis B.
Who is at risk for Hepatitis D infection?
People with chronic Hepatitis B infection are at risk for Hepatitis D, particularly those who inject drugs and share needles. Individuals with multiple sexual partners, men who have sex with men, and people receiving hemodialysis face increased risk. Healthcare workers exposed to blood, individuals born in or traveling to regions with high Hepatitis D prevalence like the Mediterranean, parts of Africa, South America, and Eastern Europe, and children born to mothers infected with both Hepatitis B and D are also at elevated risk. Anyone with Hepatitis B should be aware of their Hepatitis D risk.
What happens if Hepatitis D infection is left untreated?
Untreated Hepatitis D infection leads to more severe and rapidly progressing liver disease than Hepatitis B alone. You face a significantly increased risk of developing cirrhosis, with scarring and hardening of the liver tissue that impairs liver function. Liver failure can occur more quickly with Hepatitis D, potentially requiring liver transplantation. There is also an elevated risk of developing hepatocellular carcinoma, a type of liver cancer, and complications like portal hypertension, ascites with fluid accumulation in the abdomen, and hepatic encephalopathy affecting brain function. Early detection and medical management are crucial to slow disease progression.
Can Hepatitis D infection be diagnosed with a blood test?
Yes, Hepatitis D infection is diagnosed through blood tests that first confirm Hepatitis B infection, since Hepatitis D cannot exist without it. The Hepatitis B Core Antibody IgM test identifies recent Hepatitis B infection patterns that suggest possible Hepatitis D co-infection or superinfection. If Hepatitis B markers are positive, additional specialized blood tests for Hepatitis D antibodies and HDV RNA viral load can confirm active Hepatitis D infection. Blood tests can also measure liver enzymes like ALT and AST to assess liver damage, and detect different antibody types to determine whether the infection is acute or chronic.
How is Hepatitis D infection treated?
Hepatitis D infection is treated primarily with pegylated interferon alpha, an antiviral medication given by injection that helps the immune system fight the virus. Treatment typically lasts 48 to 72 weeks and can suppress viral replication, though it does not always eliminate the virus completely. Unfortunately, standard Hepatitis B antiviral medications like tenofovir or entecavir do not effectively treat Hepatitis D, though they may still be used to control Hepatitis B replication. Regular monitoring of liver function, viral load, and liver health through blood tests and imaging is essential throughout treatment. In cases of advanced liver disease or liver failure, liver transplantation may be necessary.
How can I prevent Hepatitis D infection?
The most effective way to prevent Hepatitis D infection is to get vaccinated against Hepatitis B, since Hepatitis D cannot occur without Hepatitis B infection. Practice safe sex by using condoms consistently and correctly, and avoid sharing needles, syringes, or any drug injection equipment. Do not share personal items that might have blood on them like razors, toothbrushes, or nail clippers. If you work in healthcare, follow proper safety protocols when handling blood or body fluids. If you already have chronic Hepatitis B, take extra precautions to avoid exposure to Hepatitis D through blood contact or high-risk behaviors.
What can I do at home to support recovery from Hepatitis D infection?
Support your liver health by avoiding alcohol completely, as it accelerates liver damage in people with Hepatitis D infection. Eat a balanced diet rich in fruits, vegetables, whole grains, and lean proteins while limiting processed foods, salt, and unhealthy fats. Get adequate rest and manage stress through gentle activities like walking, yoga, or meditation, as fatigue is common with liver disease. Stay hydrated by drinking plenty of water, and avoid taking unnecessary medications or supplements without consulting your doctor, as many can stress the liver. Regular medical follow-up with blood tests to monitor liver function is essential, and discuss any new symptoms or concerns with your healthcare provider promptly.
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If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.
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Hep B Core Antibody, IgM
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No need to visit a doctor
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