TABLE 1. Primary and supplemental data sources for investigations of possible multistate enteric disease outbreaks — United States, 2016.

Data source	Description of data source	Data type	Unit of analysis	Variables collected
Outbreak Response and Prevention Branch (ORPB) database	ORPB maintains a database that contains data collected by local, state, and federal investigators during each phase of an active outbreak investigation	Primary	Outbreak level (including aggregated patient data)	Source of the report; date possible outbreak identified; total number of illnesses; states with illnesses; unique identifier for the outbreak; pathogen; strain; the date of isolation for the earliest and most recent case; percent female and age range for ill persons; total number of persons who were hospitalized, diagnosed with hemolytic uremic syndrome, or died; type of data collected; outbreak source; mode of transmission; location of exposure to the source; name or brand of the source; whether the source was the suspected or confirmed source; whether the source was imported into the United States; types of regulatory agencies involved; whether regulatory action was taken and what type of action; whether the outbreak was announced by CDC; end date of the investigation; and general comments
PulseNet	PulseNet is a molecular subtyping network for foodborne bacterial disease surveillance	Supplemental	Case level	Patient’s age, sex, and state of residence
Foodborne Disease Outbreak Surveillance System (FDOSS)	FDOSS is a surveillance system for single-state and multistate foodborne outbreaks in the United States	Supplemental	Outbreak level	Food category