CDC has several surveillance systems for obtaining information about Salmonella. They serve different purposes and provide information on various features of the organism’s epidemiology, such as number of outbreaks, antimicrobial-resistant infections, and subtypes.


1Sentinel surveillance involves the collection of case data from only part of the total population (from a sample of providers) to learn something about the larger population, such as trends in disease. (source)

2Campylobacter, Cryptosporidium, Cyclospora, Listeria, Salmonella, Escherichia coli O157 and non-O157, Shigella, Vibrio, and Yersinia

3PFGE is a technique used to distinguish between strains of organisms, such as different types of E. coli and Salmonella. By applying an electric field that constantly changes direction to a gel matrix, large DNA molecules are separated, which allows scientists to see the unique DNA pattern—or “fingerprint”—of the organism and compare it to others.