How To Select The Detection Target, Whether To Detect Antigen Or Antibody?

Choose according to the purpose of the test.

A antibody detection: it is mainly used for monitoring the population immunity status and health level. After vaccine immunization, the qualified rate of antibody, immune protection level (titer) and antibody variation are important indicators to measure the health level of the farm population and the resistance ability to wild virus infection, which are of great significance to guide the control of epidemic diseases. At the same time, the detection of antibody is also helpful to determine the infection of field virus. Extremely high titer antibody, substandard enhanced immunity, very high antibody variation, and too low immune antibody level are all noteworthy manifestations of wild virus infection. Antibody tests are also valuable in identifying wild virus infection in unvaccinated individuals. In conclusion, long-term, stable and dynamic monitoring of antibody in animal population is of great significance.

B antigen detection: commonly used in the auxiliary diagnosis of epidemics. The combination of antigen test and gene test (PCR) is more effective. Antigen detection is used for rapid screening, while PCR can be used to confirm the disease and identify strain variations (such as highly pathogenic PRRs).