AOAC-RI Certifies the DuPont™ BAX® System X5 for Listeria Detection


The AOAC Research Institute (AOAC-RI) has approved a method extension of Performance Tested Method #030502 to include the latest DuPont™ BAX® System X5 PCR Assay for Genus Listeria. This approval validates the assay as a reliable method for detecting Listeria species in frankfurters, smoked salmon, spinach and cheese and from environmental surfaces.

BAX® System X5 PCR Assay for Genus Listeria

Listeria testing is critical for the food industry – particularly for dairy products, fresh produce and ready-to-eat meats – as an indicator that harmful L. monocytogenes may be present,” said Troy Ayers, Americas sales leader for Diagnostics, DuPont Nutrition & Health. “Accurate, reliable and flexible testing for Listeria is a priority for these industries to quickly detect and help eliminate pathogens that could lead to serious public health concerns.”

The DuPont™ BAX® System X5, which provides automated PCR-based DNA amplification and automatic pathogen detection for up to 32 samples at a time, was introduced to the food industry in July 2015. The system is designed to offer the same fast, accurate and easy-to-use pathogen detection solution that customers expect from the BAX® System method, but in a smaller lightweight construction to provide greater testing flexibility. BAX® System X5 PCR assays were previously validated by AOAC-RI for detecting Salmonella and L. monocytogenes in food and environmental samples.

DuPont Nutrition & Health addresses the world’s challenges in food by offering a wide range of sustainable, bio-based ingredients and advanced molecular diagnostic solutions to provide safer, healthier and more nutritious food.  Through close collaboration with customers, DuPont combines knowledge and experience with a passion for innovation to deliver unparalleled customer value to the marketplace. More information is available at

DuPont (NYSE: DD) has been bringing world-class science and engineering to the global marketplace in the form of innovative products, materials, and services since 1802.  The company believes that by collaborating with customers, governments, NGOs, and thought leaders we can help find solutions to such global challenges as providing enough healthy food for people everywhere, decreasing dependence on fossil fuels, and protecting life and the environment.  For additional information about DuPont and its commitment to inclusive innovation, please visit