Anti-HBe

Anti-HBe are antibodies to the HBe antigen (HBeAg), a protein that hepatitis B virus releases into blood while multiplying actively. The test is performed in people with confirmed hepatitis B alongside HBeAg so that a doctor can assess the infection phase and viral activity. It is not a test for detecting hepatitis B or checking protection after vaccination.

Who is this test for

• people with positive HBsAg, together with HBeAg, to determine the infection phase;
• people with chronic hepatitis B infection, for monitoring disease and treatment;
• people with acute hepatitis B when a doctor monitors whether infection is entering recovery;
• pregnant women with positive HBsAg, alongside HBV DNA, when a doctor assesses transmission risk to the baby.

What anti-HBe is and what it shows

Hepatitis B is liver inflammation transmitted through blood, sexual contact and from mother to child during birth. While HBeAg is present in blood, the virus usually multiplies rapidly and the person is more infectious. When the immune system starts controlling the virus, HBeAg disappears and anti-HBe antibodies appear. This change is called seroconversion and usually means less viral replication.

Positive anti-HBe does not mean the infection is harmless. In some people, genetic changes allow the virus to continue replicating and damaging the liver without HBeAg. This is called HBeAg-negative chronic hepatitis B. Disease activity is therefore assessed not only through HBe markers but also viral levels in blood (HBV DNA) and liver enzymes, primarily ALT.

The hepatitis B vaccine does not produce anti-HBe. After vaccination, only the protective antibody anti-HBs.

is produced. The basic tests to check whether someone has been infected are HBsAg and anti-HBc, while anti-HBs assesses protection. An overview of all markers is in the article Hepatitis A, B and C markers.

Preparation and sample

A venous blood sample is taken, and fasting is not required. If you take biotin (e.g. hair and nail supplements), mention this at blood collection.

How results are interpreted

Results are reported as negative (non-reactive) or positive (reactive), sometimes with a numerical value whose cut-off depends on method and is printed on the report. A doctor always interprets anti-HBe alongside HBsAg and HBeAg:

HBsAg	HBeAg	Anti-HBe	What it most often means
positive	positive	negative	active viral replication and greater infectiousness; acute infection or the HBeAg-positive phase of chronic infection
positive	negative	positive	the virus usually replicates less; this may be an inactive phase of chronic infection, but also liver-damaging HBeAg-negative chronic hepatitis, distinguished by HBV DNA and ALT
positive	negative	negative	a transitional phase or a result requiring further investigation; assessed by a doctor
negative	negative	positive	most often previous infection, with positive anti-HBc and often anti-HBs

In acute hepatitis B, suggested by positive anti-HBc IgM, disappearance of HBeAg and appearance of anti-HBe usually mean recovery is progressing. If HBsAg remains positive longer than six months, infection is chronic. Chronic infection phases can change over the years, so a doctor monitors ALT and HBV DNA through follow-up results. An infectious disease specialist or gastroenterologist supervises treatment; antivirals stop viral replication and reduce cirrhosis and liver cancer risk.

How to arrange testing

You can come for blood collection without an appointment or referral at one of our branches throughout Croatia (listed on the Contact). Prices for anti-HBe, HBeAg and other hepatitis markers are listed in the service price list.

Frequently asked questions

What does positive anti-HBe mean?

The body has produced antibodies to the hepatitis B virus HBe antigen. With negative HBsAg, it most often means previous infection. With positive HBsAg, it means chronic infection in which the virus usually replicates less, but it is not a sign of cure; a doctor assesses activity through HBV DNA and liver enzymes.

Am I contagious if anti-HBe is positive?

This depends on HBsAg. If HBsAg is positive, the virus can spread through blood and sex even with positive anti-HBe, although infectiousness is usually lower than with positive HBeAg. Do not share razors or toothbrushes; household members and sexual partners are advised to be tested and vaccinated.

Is HBeAg-negative hepatitis B milder?

Not necessarily. Many people with negative HBeAg and positive anti-HBe have inactive infection, low viral levels and normal liver enzymes. In some, however, the virus actively replicates and damages the liver, requiring regular monitoring and sometimes treatment.

What is the difference between anti-HBe and anti-HBs?

Anti-HBs indicates protection against hepatitis B and appears after vaccination or past infection. Anti-HBe appears only after infection and does not protect against infection; it helps assess its phase.