The ImmunoCard STAT!® E. coli O157 Plus is a rapid test for the detection of antigens from Shiga toxin-production E. coli O157 as an aid in the diagnosis of E. coli O157:H7 infection. The test can be used to directly test stool specimens, stool in modified Cary-Blair medium or confirmatory stool cultures grown in MacConkey broth of sorbitol MacConkey (SMAC) plates.