National Salmonella and Shigella Laboratory Isolate Reports

Surveillance data contains reports of Salmonella and Shigella isolates from human sources across all U.S. states. The data is collected through the Public Health Laboratory Information System (PHLIS) by state health officials and reported to the CDC's Division of Bacterial and Mycotic Diseases. Duplicate records are deleted for annual summaries, and for Salmonella Typhi, only the first annual isolation per person is counted.

Use Cases

• Analyze temporal trends in Salmonella serotype incidence using reported date and isolate count.
• Map the geographical distribution of Shigella isolates using the reported state field.
• Identify potential interstate case clusters by comparing the reporting state to patient residence state fields.
• Study annual case counts for Salmonella Typhi, which is deduplicated to one record per person per year.

Strengths

• Nationwide coverage includes reports from every U.S. state.
• Data is curated with duplicate records removed for annual summaries.

Limitations

• The reporting state may not match the patient's state of residence, introducing potential geographic bias.
• Sample size and temporal coverage are unknown from the description.
• Data granularity (e.g., patient demographics, specific serotypes beyond Typhi) is unspecified.

Provenance

Source

Public Health Laboratory Information System (PHLIS), managed by the CDC's Division of Bacterial and Mycotic Diseases.

Collection Method

Electronic reports submitted by State Public Health Laboratory Directors and State Epidemiologists.

Geography

United States, with reports from all states.