HAV RST is a chromatographic immunoassay (CIA) for the detection of antibodies to HAV in human serum/plasma. Mouse anti human-IgM µ strands are precoated onto membrane as a capture reagent on the test region. During the test, specimen is allowed to react with the colloidal gold particles, which have been labeled with HAV recombinant antigens. If antibodies to HAV are present, a pink colored band will develop on the membrane in proportion to the amount of HAV antibodies present in the specimen. Absence of this pink colored band in the test region suggests a negative result. To serve as a procedural control, a pink colored band in the control region will always appear regardless the presence of antibodies to HAV.