Notes
Slide Show
Outline
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E.COLI 0157:h7
Turning the Corner?
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ECH7  Incident Rate
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USDA ECH7 Rates
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USDA School Lunch
Ground Beef Testing Program
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ECH7 Incidence Overview
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ECH7 incidence is NOT increasing.
  • The appearance of increased of ECH7 over past several years is likely due to:
  • Change to more sensitive lab methods,
  • Change in sampling methodologies,
  • Increase sampling frequencies,
  • Increased public health incident reporting are likely responsible for the occurrence of greater ECH7 findings over past several years.
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ECH7  - Seasonal Effect
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USDA ECH7 Month#
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Beef Trim - Seasonal Trends
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ECH7  Seasonal Effect
  • There is definite a “warm-season” effect for ECH7 incidence in ground beef and trim.
  • Peak effects occur in different summer month periods, depending on the year.
  • There may be a 2-tiered (or even 3-tiered) season effect (late spring through early fall).
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ECH7  - To The Plant
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ECH7 - Interventions
  • Modern hide removal & dressing procedures at slaughter, coupled with thermal [whole] carcass pasteurization, are very effective in reducing incidence & prevalence of ECH7 on the carcass surface.
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Validation of Steam Pasteurization Cabinet
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ECH7 & ECsp
  • There is little [if any] relationship of ECH7 to generic E.coli I [species] that occurs on the carcass, in trim, or in ground beef.


  • We have not been able to demonstrate any relationship of ECH7 incident to other pathogens such as SLM or LSTm.
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Closing Points
  • 0157:H7 is widespread in the herd, environment, in non-meat foods, and in the general meat/food/water supply.
  • 0157:H7 in meat/food is of much higher incidence than originally believed back in 1994, when it was deemed as an adulterant in raw ground beef.
  • 0157:H7 is a widely dispersed, naturally occurring bacteria and deeming it as a zero tolerance adulterant in a raw meat, any different than any other pathogen or bacterial specie, is an ill-founded regulatory policy.
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Closing Points
  • 0157:H7 is sporadic and unpredictable.  When found, it is of very low enumeration, usually only fractions of cells/gm.