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Washes and Sanitizers to Reduce Microbial Contamination

Washes and Sanitizers to Reduce Microbial Contamination. Jim Dickson Department of Animal Science Inter-Departmental Program in Microbiology. Nature of Contamination Solid Foods. Surface Interior. Nature of Contamination Solid Foods. Physical Soil, dust, “things miscellaneous” Chemical

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Washes and Sanitizers to Reduce Microbial Contamination

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  1. Washes and Sanitizers to Reduce Microbial Contamination Jim Dickson Department of Animal Science Inter-Departmental Program in Microbiology

  2. Nature of ContaminationSolid Foods • Surface • Interior

  3. Nature of ContaminationSolid Foods • Physical • Soil, dust, “things miscellaneous” • Chemical • Pesticides, herbicides

  4. Nature of ContaminationSolid Foods • Biological • Bacterial, insects, parasites

  5. Nature of ContaminationSolid Foods • Random (most cases) • Not uniformly distributed

  6. Intervention (Mitigation) Processes • Application Type • Localized application • Whole food treatments • Processing Issues • Consistency • Uniformity

  7. Intervention (Mitigation) Processes • Physical • Mechanical (scrubbing) • Thermal (warm to hot water) • Pressure • Chemical • Acids • Bases • Oxidizers

  8. Intervention (Mitigation) Processes • Physical • Thermal (warm to hot water) • Bacteria Parasites Insects • Most ----------------------- Least

  9. Intervention (Mitigation) Processes • Chemicals • Acids, Bases, Oxidizers • Bacteria Parasites Insects • Most ----------------------- Least

  10. Application Methods • Hand Sprays • Dip Tanks • Flumes • Pressurized Sprays • Automated Wash Cabinets

  11. Processes • Single • Combination • Wash + antimicrobial rinse

  12. Examples • Cantaloupe • Beef

  13. The Top 4 Deadliest Foodborne Disease Outbreaks – United States • Raw Oysters – New York City (1924-1925) • Raw Milk – Boston (1911) • Cantaloupe – US (2011) • Mexican Style Cheese – California (1985)

  14. Jensen FarmsCantaloupe2011 http://www.cdc.gov/listeria/outbreaks/cantaloupes-jensen-farms/120811/index.html

  15. Persons infected with the outbreak-associated strains of Listeria monocytogenes, by state* * n= 146 for whom information was reported to CDC on December 2, 2011

  16. Investigation of the Outbreak • Collaborative investigations by local, state, and federal public health and regulatory agencies indicated that the source of the outbreak was whole cantaloupe grown at Jensen Farms' production fields in Granada, Colorado. • Laboratory testing by the Colorado Department of Public Health and Environment identified Listeria monocytogenes bacteria on cantaloupes collected from grocery stores and from ill persons' homes. Laboratory testing by FDA identified Listeria monocytogenes outbreak strains in samples from equipment and cantaloupe at the Jensen Farms' packing facility in Granada, Colorado.

  17. Cantaloupe – Field Pack

  18. Cantaloupe – Shed Pack

  19. Cantaloupe – Shed Pack

  20. Martori adopts new food-safety program forcantaloupes • The process, which employs a hot water shower to clean pathogens from the melons’ rough skin, looks to address critical food-safety issues that were ultimately related to the crevices in cantaloupe rinds. The hot water shower was developed, beginning several years ago, through close cooperation with the U.S. Department of Agriculture’s Eastern Regional Agricultural Research Center in the Philadelphia suburb of Wyndmoor, PA. The research led to Martori’s system, which was commercially implemented in late April for the firm’s 2013 season launch. The water shower lasts for approximately 20 seconds on each cantaloupe, which is rotated during the process. Targeting a water temperature of 162 degrees F, this brief hot water bath pasteurizes the skin, but is brief enough to avoid heating or injuring the cantaloupe’s flesh.

  21. Beef • E. coli O157 • Salmonella

  22. Beef

  23. Beef

  24. Beef

  25. Beef

  26. Beef

  27. Beef

  28. Washes and Sanitizers to Reduce Microbial Contamination Advantages Limitations Surface Only treatment Many not cover every surface Environmental issues Water Chemical disposal • Scalable • Can be automated • Cost Effective

  29. QUESTIONS?

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