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Related Experiment Video

Updated: Nov 24, 2025

Modified Most Probable Number Assay to Quantify Salmonella in Raw and Ready-to-Cook Chicken Products
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Recency-Weighted Statistical Modeling Approach to Attribute Illnesses Caused by 4 Pathogens to Food Sources Using

Michael B Batz, LaTonia C Richardson, Michael C Bazaco

    Emerging Infectious Diseases
    |December 22, 2020
    PubMed
    Summary

    This study attributes US foodborne illnesses to specific foods. Key sources include seeded vegetables for Salmonella and beef for E. coli O157, guiding food safety efforts.

    Keywords:
    CampylobacterEscherichia coli 0157ListeriaSalmonellaanalysis of variancedisease outbreaksfood safetyfoodborne diseasesmodelsrisk factorsstatistical

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    Area of Science:

    • Food safety
    • Epidemiology
    • Statistical modeling

    Background:

    • Foodborne illness source attribution is critical for effective food safety strategies.
    • Understanding pathogen origins informs targeted interventions and risk reduction.

    Purpose of the Study:

    • To develop and apply a statistical method for attributing US foodborne illnesses to specific food categories.
    • To identify the primary food sources for nontyphoidal Salmonella enterica, Escherichia coli O157, Listeria monocytogenes, and Campylobacter.

    Main Methods:

    • Utilized statistical modeling on reported outbreak data from 1998-2012 (952 outbreaks, 32,802 illnesses).
    • Adjusted for outbreak size and down-weighted older data to refine attribution estimates.
    • Estimated credibility intervals for source attribution.

    Main Results:

    • Attributed 77% of Salmonella illnesses to 7 food categories (e.g., seeded vegetables, eggs, chicken).
    • Identified beef and vegetable row crops as sources for 82% of E. coli O157 illnesses.
    • Linked 81% of L. monocytogenes illnesses to fruits and dairy, and 74% of Campylobacter illnesses to dairy and chicken.

    Conclusions:

    • The study provides significant insights into foodborne illness attribution for major pathogens.
    • Findings support targeted food safety interventions based on identified sources.
    • Caveats exist for Campylobacter attribution due to potential overrepresentation of dairy in outbreak data.