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- 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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- 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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- 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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- 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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- 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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- 0157:H7 is sporadic and unpredictable.
When found, it is of very low enumeration, usually only fractions
of cells/gm.
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