The CMV IgM Rapid Test Cassette (Serum/Plasma) is a qualitative, lateral flow immunoassay for the detection of IgM antibodies to CMV in serum or plasma specimens. In this test, antigens of CMV are coated in the test line regions of the test. During testing, the serum or plasma specimen reacts with Goat antihuman IgM coated particles in the test strip. The mixture then migrates forward on the membrane by capillary action and reacts with the CMV specific antigens on the membrane in the test line region. The presence of a colored line in the test line region indicates a positive result for CMV infection, while its absence indicates a negative result for that infection. To serve as a procedural control, a colored line will always appear in the control line region of the strip indicating that proper volume of specimen has been added and membrane wicking has occurred.