What is antigen test for canine distemper?

What is antigen test for canine distemper?

The CDV Antigen Rapid Test Device is a qualitative lateral flow immunochromatographic assay for detection of Canine Distemper Virus antigens (CDV).  The test device has a testing window containing a T (test) region and C (control) region. During testing, sample is applied into the sample well on the Device.