In chapter 10 of Unnaturally Delicious, I wrote about a variety of food safety innovations. Frank Yiannas, Walmart's vice president for food safety told me a bit about some of the technologies and efforts he's been involved with. But, first on Walmart itself:
He went on to tell me about how they're ensuring rotisserie chickens are properly cooked.
I also talked to Kevin Myers, the senior vice president of research and development for Hormel, who was involved in implementing a relatively new technology to help ensure safe meat: high pressure processing.
All that pressure is enough to kill bacteria and other pathogens without adversely affecting the food itself. Here's a photo of a high pressure pasteurization machine provided by Avure Technologies, which is finding applications of high pressure pasteurization for a wide variety of foods.
There is more in the chapter on Walmart, Hormel, and on innovators working on new, rapid food safety testing devices.