IMTEC-Salmonella-Antibodies Screen (cut-off) is an enzyme immunoassay (ELISA) for the qualitative measurement of IgG, IgM and IgA class autoantibodies against Salmonella in human serum. The assay is intended for in vitro diagnostic use only as an aid in the diagnosis of reactive arthritis.

The clinically most significant forms of reactive arthritis (ReA) develop within a few days to weeks after infection of the urogenital tract with chlamydia and the gastrointestinal tract with salmonella, yersinia, shigella or campylobacter respectively. Up to 40% of all cases, including a special form of Reiter's syndrome, are chronically progressive.