Canine Distemper Virus (CDV) is a highly contagious disease that can cause severe respiratory, gastrointestinal, and neurological illness in dogs. The Diagno CDV Ab/Ag Rapid Test is a differential test that helps distinguish between an active infection (via antigen detection) and a dog's immune status from vaccination or past exposure (via antibody detection). The test utilizes serum/plasma for antibody detection and ocular/nasal secretions for antigen detection, providing accurate results in 10 minutes.