Antigen testing is a testing method for specific antigenic components carried by specific pathogens, through which the source of infection can be diagnosed and targeted treatment can be carried out. Antigens are widely present on the surface of fungi, bacteria, viruses, rickettsiae, chlamydia and other pathogens, the essence of which is a glycoprotein, and the antigen on the surface of each pathogen is unique, equivalent to the pathogen’s “ID card”, and through immunofluorescence, chemiluminescence and other antigen detection methods, the antigen can be determined to determine the type of antigens, and thereby determine the type of infectious agents. Determine the type of infectious agent. After determining the infecting pathogen, targeted treatment can be used for the pathogen, such as chlamydia, macrolide antibiotics such as erythromycin can be used; viral infections, acyclovir and other drugs can be used. The above drugs need to be used under the guidance of clinicians, do not use drugs without authorization; suspected fungal, bacterial, viral, rickettsiae, chlamydia and other pathogens infections, it is recommended to go to the hospital in a timely manner.