Antigen detection is not a new technology, but is widely used in the detection of infectious diseases in humans and animals. The reporter discovered that consumers can purchase antigens for Helicobacter pylori, hepatitis B virus, Chlamydia trachomatis, Neisseria gonorrhoeae and feline goblet virus.
Sun Yamin, a professor at the Institute of public health and health of Nankai University, told reporters that in the process of natural infection, the protein domain of the virus can stimulate the human body to produce antibodies. "The antigen detection of virus is that Mr. produces virus antibody, then binds with the domain of virus protein, and judges whether virus infection has occurred through color development."
The principle of nucleic acid detection and antibody detection is different from that of antigen detection. Nucleic acid detection is to detect the RNA sequence of virus by fluorescence quantitative PCR, which is the "gold standard" of clinical diagnosis; Antibody test is to test whether there is antibody in the blood by drawing blood. If it is positive, it means that this person has been infected with Xinguan or vaccinated. With the continuous expansion of vaccination population in China, the role of antibody detection in screening is not obvious.