Hepatitis B surface antibody (anti-HBs) positive

Introduction Anti-HBs are hepatitis B surface antibodies; they are protective antibodies against hepatitis B, that is, anti-HBs positive indicates that the body has immunity to hepatitis B virus. The emergence of anti-HBs marks the recovery of hepatitis B infection and has produced immunity. Less re-infection occurs after the onset of anti-HBs. However, this protection is not complete, absolute, and sometimes short-lived, and patients can still re-infect.

Cause

There are two reasons for the emergence of anti-HBS:

1 After receiving hepatitis B vaccine, immunity is obtained, which is a good phenomenon.

2 Hepatitis B recovery period or has suffered from hepatitis B, indicating that there is immunity.

Anti-HBs generally appear 1 to 5 months after the disappearance of hepatitis B surface antigen (HBsAg), and rise slowly, reaching a peak in about 6 months, which can last for one year or longer. The higher the titer of anti-HBs in serum, the stronger the protection.

an examination

Related inspection

Serum pre-S1 protein serum anti-S2 protein serum pre-S2 protein

Anti-HBs This is an antibody produced by hepatitis B virus surface antigen (HBsAg) after stimulating the body's immune system. It is a protective antibody, also called a neutralizing antibody. It neutralizes the infectivity of hepatitis B virus and protects the body from the hepatitis B virus.

Anti-HBS positives indicate at least three questions:

(1) Hepatitis B patients have reached the recovery period and will soon bid farewell to hepatitis B virus infection;

(2) He has been infected with hepatitis B virus, may have hepatitis B disease, or may be an unintentional latent infection, but now the virus has been cleared, and he is immune to hepatitis B, even if hepatitis B virus invades the body. Safe and sound;

(3) The simple anti-HBs-term positive is a sign of hepatitis B vaccine injection and successful immunization, of course, it will not be infected with hepatitis B virus.

Among the three brothers of hepatitis B antibody, anti-HBS is the most special. It is incompatible with hepatitis B antigens (HBsAg, HBeAg and HBCAg), it is positive, and the antigens are negative. Only in very special cases, anti-HBS and HBsAg appear simultaneously.

Differential diagnosis

After hepatitis B vaccination, the anti-HBs will gradually decrease with time, and when the anti-HBs titer falls below the protective value, it will no longer be immune to hepatitis B virus. Therefore, in order to ensure the preventive effect, after vaccination with hepatitis B vaccine, blood tests should be performed, and two and a half should be checked. If the anti-HBs are positive, the vaccination is successful, and the anti-HBs titer should also be checked.

1. If the highest value of anti-HBs titer is only 10 ~ 100mIU / m1, it is best to repeat 1 time after 6 months;

2. When the highest anti-HBs titer is 1011000mIU/ml, the anti-HBs should be retested within 1~2 years after the first inoculation;

3. If the anti-HBs are between 1001 and 10000 mIU/ml, they should be retested within 2 to 4 years;

4. When the anti-HBs is greater than 10000 mIU/ml, it can be retested within 4 to 6 years;

5. When the anti-HBs titer is found to be less than 10 mIU/ml, the seed should be replanted, and the multiple cropping should still be carried out according to the initial dose and time schedule.

Hepatitis B vaccination is a reliable method to prevent hepatitis B, but it is not absolute and once and for all. After inoculation, the inoculation effect and anti-HBs titer must be tested, and the anti-HBs titer should be retested according to the anti-HBs titer. When the titer is less than the protection value, it should be replanted in time to maintain effective anti-HBs titer in the body. In order to effectively prevent hepatitis B virus infection, it can really achieve the purpose of preventing hepatitis B.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.