J. David Legan, PhD
Director of Science
David earned his Ph.D. in Food Technology from the University of Reading in the UK by modeling the ecology of mixed microbial populations, and then moved to Campden BRI in a variety of microbiological food safety research and client service roles. During that time, he was project lead for the Bacillus component of the UK’s pathogen modeling program. He moved again to Nabisco Research in New Jersey where he ran the corporate microbiology lab and developed a program of preservation technology development and microbial modeling. After the Kraft Foods acquisition, he moved to Chicago to work on Food Safety and Preservation research, and through modeling and validation studies:
- Optimized Oscar Mayer’s use of lactate and diacetate and their naturally cultured alternatives as Listeria-control agents in Ready to Eat meats
- Specified process conditions central to Oscar Mayer’s commercial launch of High Pressure Pasteurization of naturally cured RTE meats
David had responsibility for the Kraft cultures R&D group, developed a partnership to explore microwave sterilization leading to several patents, and led a program that developed an internal proprietary natural antimicrobial commercialized in several Kraft products. Technologies from his group supported approximately $4 billion in annual sales.
After years as a microbiology "client", he is now back in the "provider" role as Director of Science at Eurofins Microbiology Laboratories, Inc., by way of the Covance Food Solutions group based in Madison, WI, which he joined in 2016. In this role, he ensures appropriate method validation, explores new testing technologies, and fields multiple complicated food microbiology questions.
Products that his team has evaluated or developed and launched include:
- The 3M MDS platform in the Madison microbiology laboratory
- Flow cytometry for enumeration of probiotics
- Strain-level confirmation of probiotic identification using the polymerase chain reaction (PCR)
- Next-generation sequencing using the Oxford Nanopore Technologies GridION sequencing platform for microbial identification and microbiome analysis
Below are resources from David:
Arsenic is naturally occurring all around us, but that doesn't mean it's always safe to consume. Consumers are looking to companies to test their products, know their levels, and keep them safe. Learn more about the different forms of arsenic and relative risk for presence in products.
Food fraud can result in serious public health consequences and damage to your brand's reputation. Learn about products at risk for food fraud and steps you can take to protect your company.
Contaminated peanut butter recalls have wreaked havoc on the food industry. By understanding how to prevent and mitigate risk of Salmonella contamination, we can prevent economic loss and illness. Learn more in this article about why it keeps happening.
The USDA establishes a new standard for disclosing bioengineered food. Does the mandate apply to you? Read to learn more.
Developing a product requires careful consideration of storage, transport, and retail conditions. Spoilage organism testing helps determine the risk of bacterial spoilage under different conditions. Additionally, spoilage testing can be added to routine microbiology testing to ensure continued product quality and safety.
Indicator organisms are groups of microbes that are correlated with other groups. In other words, the presence of one indicates the presence of another. So, indicator testing detects a small group of pathogens instead of running over 30 tests to look for all potential harmful groups. This reduces testing times and costs.
Which food labeling rule applies to your food product? Learn more about USDA and FDA Food Labeling guidelines, coverage, and differences.
Where do you start when you're looking for a laboratory to for your testing needs? Check out our checklist of steps to choosing the right lab partner for your company.
PFAS have valuable uses and extreme chemical stability, but can lead to adverse health outcomes. Learn why PFAS testing in foods is now becoming an essential need for your food and supplement products in the market.
In 2016, the FDA updated the Daily Value (DV) and Reference Daily Intake (RDI) for several nutrients, including Vitamin E. The RDIs are published by the National Academy of Medicine (NAM) and based on the Recommended Dietary Allowances (RDA) of α-Tocopherol, as it is the only form of Vitamin E maintained in the blood and has biological activity. Thus, Vitamin E per NLEA regulations (or mg label claim) is defined as milligrams α-Tocopherol. Review this fact sheet for more information about reporting Vitamin E per the regulations.
