News from the Center for Food Safety

Spoiler Alert! When Does Food Actually Go Bad?

Dr. Francisco Diez recently participated in the conversation about spoilage on National Public Radio’s Science.

Meat and poultry cooking video goes viral!

With more than 1M views in Adam Ragusea’s YouTube channel, his video interview entitled “Why Rare Steak is Safe — but NOT Rare Chicken” with Prof. Diez proves to be a great media for learning food safety.

Watch the video:

The 5th Edition of Food Microbiology: Fundamentals and Frontiers has been published

CFS Founding Director Mike Doyle and Francisco Diez collaborated with Prof. Colin Hill from University College Cork in Ireland as co-editors of the thoroughly updated edition of this landmark textbook. Since its introduction in 1997, the purpose of Food Microbiology: Fundamentals and Frontiers has been to serve as an advanced reference that explores the breadth and depth of food microbiology. The Fifth Edition adds coverage of the ever-expanding tool chest of new and extraordinary molecular methods to address many of the roles that microorganisms play in the production, preservation, and safety of foods.

Link to ASM Press



David Mann elected CFS’ Employee of the Year

Employee of the Year is an annual tradition of our Center that recognizes the work of one of our full time classified staff member. This is a recognition that is awarded to one of our colleagues who has performed exceptionally in their job duties over the past year and thus has been a valuable asset to the Center. The requirements are a minimum time of employment of 1 year. CFS faculty, staff, post-docs and graduate students select the awardee by secret ballot. This award carries an honorary plaque and a monetary prize of $300. Last on January 22, 2020, Mr. David Mann was awarded the CFS Employee of the Year recognition.  Congratulations David!!!

David Mann began his employment with the University of Georgia in 2001 as a part-time laboratory assistant and after 16 years as full time staff he currently serves as Research Professional II. Throughout his employment at CFS, David has shown exceptional commitment to the mission and goals of UGA. He has distinguished himself for his versatility by contributing to a multitude of research projects throughout his tenure at UGA. He has been involved in the entire process of conducting food safety microbiology research, from the generation of ideas all the way to the publication of results in peer-review journals. He has worked with multiple foodborne microorganisms in projects that were aimed to study their ecology and interaction with foods and the environment. David is an outstanding coworker who frequently exceeds the expectations of his supervisor and many other researchers at CFS who trust his expertise and support. He is a particularly gifted individual regarding his adaptability, given the fact that he has reported to 5 different Principal Investigators.  He is currently a key research member with Dr. Xiangyu Deng. We are very fortunate to have him as a key member of our academic unit.

Recent Publications    

He Y, Zhou X, Chen Z, Deng X, Gehring A, Ou H, Zhang L, Shi X. 2020. PRAP: Pan resistome analysis pipeline. BMC Bioinform 21:20

Katz L, Griswold T, Morrison SS, Caravas JA, Zhang S, den Bakker HC, Deng X, Carleton HA. 2019. Mashtree: a rapid comparison of whole genome sequence files. J Open So Soft 4 (44), 1762 DOI: 10.21105/joss.01762

Qi Y, He Y, Beuchat LR, Zhang W, Deng X. 2020. Glove-mediated transfer of Listeria monocytogenes on fresh-cut cantaloupe. Food Microbiol 88 (103396) DOI: 10.1016/

Burnett J., Wu S.T., den Bakker H.C., Cook P.W., Veenhuizen D.R., Hammons S.R., Singh M. & Oliver H.F., Listeria monocytogenes is prevalent in retail produce environments but Salmonella enterica is rare, Food Control (2020), doi: .

Cho Y, Kim H, Beuchat LR, Ryu J-H. 2020. Synergistic activities of gaseous oregano and thyme thymol essential oils against Listeria monocytogenes on surfaces of a laboratory medium and radish sprouts. Food Microbiol. 86.


Center for Food Safety Director

Francisco Diez-Gonzalez Director and Professor
Center for Food Safety
Center for Food Safety
Melton Building
350 Woodroof Drive
Griffin, Ga. 30223