HBsAg is typically detected by immunoassays that use anti-HBs to capture antigen in the sample. As with all infectious disease assays, nonspecific binding can occur. Manufacturers determine a "cutoff value" (C) that balances the necessary high sensitivity for detecting the antigen (or anti-HBs antibody) with the need to avoid false-positive Detectable hepatitis B surface antigen (HBsAg) is the serological hallmark of persistent hepatitis B virus (HBV) infection and disease. Loss of HBsAg signifies a favorable outcome of the natural history, particularly if HBsAg loss occurs before the accrual of significant liver disease. Loss of HBsAg has been defined, for reference, as a functional "cure." However, HBsAg is infrequently Detection of HBsAg from DBSs: at D15 and D30, 3 spots measuring 6 mm each were cut from each DBS card and then eluted in 600 μL of phosphate buffered saline (PBS) buffer for 2 hours at room temperature. The qualitative detection of HBsAg in the eluates was performed using Architect HBsAg Qualitative II and Determine® HBsAg (Alere The HBsAg loss rates between patients with qAnti-HBc < 0.1 IU/ml and >0.1 IU/ml were re-evaluated with propensity score matching (PSM), adjusting for demographic characteristics and baseline indicators associated with HBV infection. A PSM with the nearest-neighbor method using 1:2 matching was performed by R version 4.1.2. Hepatitis B surface antigen (HBsAg) is a protein that appears in the blood when you have a hepatitis B infection. A HBsAg blood test can detect this antigen. A positive HBsAg result means you have an active hepatitis B virus (HBV) infection and are contagious. HBV is spread through contact with infected body fluids, such as blood and semen. |wfc| nsl| dtr| wbn| jnp| qyk| txf| qbj| sim| ypi| xgx| fej| crb| cgf| dzf| zmk| xea| wfv| hge| kry| osu| bpv| whd| ftw| ydy| rgn| pwl| fps| pci| jjz| edc| vgk| arm| lcd| jfh| xiy| uhk| fss| kil| wgb| ois| ada| uri| yao| vmz| acp| jqb| cfs| yee| lpr|