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Related Experiment Videos

Pathogen detection, testing, and control in fresh broccoli sprouts.

Jed W Fahey1, Philippe J Ourisson, Frederick H Degnan

  • 1Department of Pharmacology and Molecular Sciences, Lewis B, and Dorothy Cullman Cancer Chemoprotection Center, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA. jfahey@jhmi.edu

Nutrition Journal
|April 25, 2006
PubMed
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Safe consumption of green vegetable sprouts is achievable through rigorous microbial testing. A "test-and-re-test" protocol effectively identified and removed contaminated sprout batches, ensuring food safety for consumers.

Area of Science:

  • Food Safety
  • Microbiology
  • Agricultural Science

Background:

  • Fresh vegetable sprouts can pose foodborne illness risks if not properly handled.
  • Adherence to industry and regulatory sanitation guidelines is crucial for safe sprout production.
  • Contamination incidents often stem from non-compliance with established safety protocols.

Purpose of the Study:

  • To evaluate the effectiveness of a microbial hold-and-release testing program for broccoli sprouts.
  • To assess the impact of strict sanitation procedures on sprout safety.
  • To determine the feasibility of minimizing crop loss and testing costs through specific testing strategies.

Main Methods:

  • A one-year microbial hold-and-release testing program was implemented with 13 U.S. broccoli sprout growers.

Related Experiment Videos

  • Strict seed and facility cleaning protocols were enforced throughout the study.
  • Microbial contamination tests were conducted on 6839 sprout drums, covering approximately 5 million consumer packages.

    • Main Results:

    • A low incidence of contamination was observed, with only 0.75% of initial samples testing positive for Escherichia coli O157:H7 or Salmonella spp.
    • Re-testing confirmed contamination in 3 of the initially positive drums.
    • Composite testing (pooling multiple drums) demonstrated sensitivity comparable to single-drum testing for pathogen detection.

    Conclusions:

    • A "test-and-re-test" protocol effectively identified and isolated contaminated sprout batches, preventing their entry into the food supply.
    • Pooling samples for testing significantly reduced associated costs, a major factor in sprout production expenses.
    • The implemented testing scheme successfully ensured that only safe sprouts were packaged and shipped, minimizing risks to consumers.