Linda J. Harris presents UGA's J. G. Woodroof Lecture for 2025

Laura Strawn, Linda J. Harris, and Michelle D. Danyluk
Associate Professor Laura K. Strawn, Virginia Tech University; Linda Harris; and Professor Michelle D. Danyluk, University of Florida. Both Strawn and Danyluk are alumni of the UC Davis Department of Food Science and attended the seminar.
Zann Gates

FST's Distinguished Professor of Cooperative Extension in Microbial Food Safety, Linda Harris, gave the prestigious 2025 J. G. Woodroof Lecture, which was part of the spring 2025 Provost’s Signature Lecture Series, at Department of Food Science and Technology at University of Athens, Georgia, on April 10th.  (Event Flyer, PDF 2.2 MB)

Her talk was titled, Nuts! How a foodborne outbreak serendipitously shaped a career".  Here's the descriptor from the event page, which handily sums up why Linda is colloquially known as the "Almond Queen" in her field: 

In 2001, an outbreak of salmonellosis (Salmonella Enteritidis Phage Type (PT) 30) in Canada and the U.S. was linked, for the first time, to consumption of raw California almonds. The traceback investigation identified the outbreak strain in the almonds at retail and all along the supply chain back to the orchard. Subsequent studies attempted to uncover potential routes of contamination of Salmonella during production, harvest and postharvest handling, and an explanation for long-term environmental persistence. At the same time, laboratory studies focused on methods to inoculate and recover microorganisms from almonds, survival of pathogens on almonds during storage, and evaluation of the thermal resistance of candidate surrogates when compared with Salmonella, Escherichia coli, and Listeria monocytogenes. These data, along with information on the prevalence and levels of Salmonella in almonds, enabled the development of quantitative microbial risk assessments, the establishment of appropriate target reductions for lethality process controls, and validation of several key commercial practices such as blanching and oil roasting. More recent studies have explored the risks associated with soaking almonds and a range of plant-based dairy analogs made from them. The presentation will cover the journey of over 20 years of research surrounding a single crop and pathogen pair that spans from orchards and production agriculture practices to final preparation and consumption.

Who was J. G. Woodruff?  You can think of him as Georgia's version of William V. Cruess, who founded our Department.  J. G. Woodruff, who was a contemporary of Cruess and may even have crossed paths with him at UC Berkeley, was known as the "father of food science"; he worked with University of Georgia's Experiment Station on developing technology for the modern fruit, vegetable, nut, and military rations handling.  You can read more about him here

 

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