Serum anti-pre-S2 protein

Pre-S2 antigen in serum of patients with anti-S2 protein acute hepatitis B before induction of virus produces pre-S2 antibody (Anti-PreS2), but there is no such special conversion in the process of chronic stress, suggesting that this antibody may predict HBV infection Recovery, like anti-HBe, is a marker of reduced viral replication levels. Basic Information Specialist classification: Infectious disease examination and classification: immunological examination Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Normal value: no Above normal: negative: normal. Positive: Infected with hepatitis B. Tips: Be careful not to take the medicine before the examination. You must not drink alcohol the day before. You can't eat before the test. The blood test requires fasting. The fasting time is usually 8 to 12 hours. Normal value Hepatitis B virus anti-pre-S2 antibody was negative for normal values. Clinical significance Abnormal results: Anti-PreS2 is a neutralizing antibody against HBV, which has the effect of clearing the virus. Early anti-PreS2 in serum indicates that the prognosis of patients with acute hepatitis B is good. Need to check the crowd: hepatitis B patients. Positive result may be disease: hepatitis B precautions Taboo before inspection: 1. Be careful not to take the drug before the test, because some drugs will increase the burden on the liver, causing temporary damage to the liver function, which will lead to the accuracy of the liver function test results. 2. Pay attention to ensure adequate sleep before exercise, do not exercise vigorously, which may cause elevated transaminase, thus affecting the test results. 3. You must not drink alcohol the day before. Drinking alcohol will cause an increase in transaminase and affect the test results. Taboo when checking: 1. Can not eat before the examination, blood test requires fasting, fasting time is generally 8 to 12 hours. 2. The venous blood taken should be fresh and tested immediately. Inspection process 2 ml of venous blood, no anticoagulation, ELISA method was used to determine the serum of hospitalized patients. Not suitable for the crowd Not suitable for the crowd: no. Adverse reactions and risks There are no related complications and hazards.