Assurance(R) GDS is an advanced genetic detection system for food pathogens. The Shiga Toxin Genes (Top 7) Tq is an automated nucleic acid amplification system for the detection of the stx1 and stx2 genes in the following Top 7 O serogroups of E. coli: O103, O111, O121, O145, O26, O45, and O157....