A high-sensitivity quantitative ELISA detection system for the large HBV surface (LHBS) protein was developed. It includes monoclonal antibodies for LHBSchemiluminescent sandwich ELISA method. Clinical tests of the ELISA prodcuts have been performed in CHB cases. The LHBS detection methodsproducts have been filed for US provisional patentwill be submitted for the IVD approval.

A virus NT was performed in a biosafety level 3 laboratory to determine the titers. A SARS-CoV-2 enzyme-linked immunosorbent assay (ELISA) was designed to detect neutralizing antibodies in the serum, based on the binding affinity of SARS-CoV-2 viral protein 1viral protein 2 to antibodies. ELISA results viral protein 12, generated comparable neutralizing antibody titers. The results analyzed by spline regressiontwo-variable generalized additive model precisely reflected the real NT value. Our method can serve as a surrogate to quantify neutralizing antibody titer.

The technology optimizes the antigen protein expression system, so that the structural protein Erns of CFSV converts insoluble proteins into soluble proteins during the production process. The breakthrough of this technology allows the antigen protein to be applied to the development of an immune attachment screening platform, as a specialized differential diagnostic reagents can distinguish between virus-infectedvaccinated pigs, which can be applied to the monitoring system of virus transmission rangevaccination