Summary
This document is a technical report detailing the dd-Check STEC Solution, a method for testing Shiga toxin-producing Escherichia coli (STEC) in food samples. It outlines the methodology and processes involved in utilizing droplet digital PCR (ddPCR) technology for culture-independent confirmation of STEC following primary screening by quantitative PCR (qPCR) assays. The report presents two studies evaluating the effectiveness of the dd-Check STEC Solution in comparison to the USDA MLG 5C.01 method. The first study involved 100 beef samples from a major U.S. food lab, while the second study utilized samples from a government research lab. Key results from both studies indicate a high level of agreement in identifying linked virulence profiles between the ddPCR assay and the USDA method. The report also includes timelines for utilizing the dd-Check STEC Solution as both a screening and confirmatory method, emphasizing its application in enhancing screening accuracy and reducing false-positive reactions.
