From tainted spinach to recalled hamburgers to peanut butter, there seems to be a growing incidence of health scares involving salmonella, E. coli and other food-borne illnesses. This episode explores the science of identifying and tracking food pathogens in the U.S. Ken Puzey of QuantaSpec, Inc., in Burlington, Vt., describes how his company is making great strides in early detection, and Dr. Jane Hill at the University of Vermont explains the complex issues of pathogen migration.

Classroom Connections

Season 3 Teacher's Guide (PDF)