PHLIS Surveillance Data

The National Salmonella Surveillance System and the National Shigella
Surveillance System collect reports of isolates of Salmonella and
Shigella from human sources from every state in the United
States. This information is reported through the Public Health
Laboratory Information System (PHLIS), an electronic reporting system,
by the State Public Health Laboratory Directors and State and
Territorial Epidemiologists to the Foodborne and Diarrheal Diseases
Branch (FDDB) and the Biostatistics and Information Management Branch
(BIMB) of the Division of Bacterial and Mycotic Diseases in the
National Center for Infectious Diseases.

The number of isolates reported by geographical area (e.g. state)
represents the state where laboratory confirmation was performed; in
some instances the reporting state is not the same as the state of
residence of the person from whom the isolate was obtained. For
Salmonella serotype Typhi, only the first isolation in a year for each
person is counted. For the Annual Tabulation Summaries, duplicate
records are deleted.