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An approach for developing quantitative risk-based microbial standards for fresh produce.

Kristina D Mena1, Suresh D Pillai

  • 1University of Texas Health Science Center at Houston, School of Public Health, P.O. Box 20186, Houston, TX 77225, USA.

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Developing microbial standards for fresh produce is crucial for food safety. This study uses quantitative microbial risk assessment to estimate infection risks from contaminated carrots, providing benchmarks for growers.

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Area of Science:

  • Food Safety
  • Microbial Risk Assessment
  • Agricultural Practices

Background:

  • Good Agricultural Practices (GAP) aim to minimize produce contamination by microbial pathogens.
  • Lack of microbial standards hinders decisions on disinfection and watershed protection.
  • Quantitative microbial risk assessment (QMRA) is essential for developing these standards.

Purpose of the Study:

  • To present a framework for applying QMRA to establish microbial standards for fresh produce.
  • To estimate infection risks associated with consuming contaminated carrots.
  • To identify critical factors influencing risk estimates for growers.

Main Methods:

  • Utilized pathogen monitoring data for Salmonella on carrots.
  • Assumed various scenarios for the likelihood of consuming contaminated carrot servings annually.
  • Performed quantitative microbial risk assessments to estimate annual infection risks.

Main Results:

  • Estimated annual infection risks ranged from 2.20 x 10(-5) to 2.16 x 10(-3).
  • Risk varied based on the assumed percentage of contaminated carrot servings consumed (1% to 100%).
  • Identified critical factors impacting risk estimates for produce safety.

Conclusions:

  • QMRA provides a viable approach for developing microbial standards for fresh produce.
  • Risk estimates offer benchmarks for growers to reduce public health risks.
  • Data-driven standards are necessary for effective food safety interventions in agriculture.