Hepatitis B surface antibody (anti-HBs) positive
Introduction
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
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.
Examine
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.
Diagnosis
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.
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