Hepatitis B surface antigen positive

Hepatitis B is a very common disease. Many people are carriers of hepatitis B. Hepatitis B must be able to attract our attention in time. Hepatitis B is a very contagious disease and must be treated in time. So do you know about hepatitis B surface antigen positivity? Many people may not have heard of this phenomenon. Today we will take a look at what this disease is.

Hepatitis B is a common infectious disease. Hepatitis B also has a certain incubation period. There are many types of hepatitis B. How much do you know about hepatitis B surface antigen positivity? Let us introduce what the hepatitis B surface antigen positivity is like.

Hepatitis B surface antigen (HBsAg) is the outer shell protein of hepatitis B virus. It is not contagious itself but only has antigenicity. But its appearance is often accompanied by the presence of hepatitis B virus, so it is a sign of infection with hepatitis B virus. It can be found in the patient's blood, saliva, milk, sweat, tears, nasopharyngeal secretions, semen and vaginal secretions. A positive result can be detected in the serum 2 to 6 months after infection with hepatitis B virus, when alanine aminotransferase increases 2 to 8 weeks before the onset. Most patients with acute hepatitis B can turn negative in the early stage of the disease, and this indicator can remain positive in patients with chronic hepatitis B.

Several situations in which HBsAg is positive:

1. Hepatitis B surface antigen is positive, and hepatitis B virus DNA is less than 1000. It is generally believed that only the surface shell of hepatitis B virus exists in the body, and there is no hepatitis B virus DNA, no virus replication and no infectiousness. Only regular inspection is required;

2. Hepatitis B surface antigen is positive and hepatitis B virus DNA>1000, which means that there is complete hepatitis B virus in the body, which is replicable and contagious. The strength of the contagiousness depends on the amount of hepatitis B virus DNA.

Therefore, when the hepatitis B virus surface antigen is positive, do not panic, but make a comprehensive judgment based on the PCR test results.

Is surface antigen positive for hepatitis B?

Hepatitis B surface antigen (HBsAg) positivity is one of the signs of hepatitis B virus infection in the body, which may occur in the following situations:

1. Hepatitis B incubation period. After a person is infected with the hepatitis B virus, HBsAg positivity first appears in the infected person's serum. The test is usually positive 2-3 weeks before the onset of hepatitis B, reaches its peak when the disease occurs, and 80% of the infected people disappear within 4 weeks after the onset of the disease.

2. If HBsAg is accidentally found to be positive during a physical examination or blood test, the person may be an asymptomatic carrier of the hepatitis B virus, or he may not be diagnosed and treated in time after infection due to mild symptoms. When the disease is discovered, the liver function has returned to normal, but HBsAg is positive. Therefore, so-called "healthy carriers" need to have their liver function checked regularly. If the serum transaminase level remains normal, no special treatment is required.

3. Chronic hepatitis B. There are symptoms and signs, not only HBsAg is positive, but also hepatitis B virus e antigen (HBeAg) is positive, and serum transaminase is often elevated. This situation indicates that the virus is multiplying in the patient's body, constantly damaging the liver, and may eventually develop into cirrhosis. A few may develop liver cancer, and active treatment should be given.

In our lives, we will encounter some patients with positive hepatitis B surface antigen. Such patients should maintain a good attitude and not be too anxious. A bad mood is not conducive to recovery from the disease. Don’t let yourself feel inferior because of fear of infecting others with this disease. Seek treatment in time and pay attention to some issues in your daily diet.