Editor’s note: This is part of a series of articles leading up to the 20th annual Food Safety Summit. The event, from May 7-10 at the Donald Stephens Convention Center in suburban Chicago, includes certification courses; a trade show with exhibitors from industry, academia and government; an extensive list of seminars and panel discussions; and a Town Hall meeting with top officials from the FDA, USDA and CDC. Visit www.foodsafetysummit.com for more details and to register.…