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Assessing abattoir hygiene with a marker organism
W R Hudson1, G C Mead, M H Hinton
1Division of Food Animal Science, University of Bristol, Langford.
The Veterinary Record
|June 24, 1998
Summary
A nonpathogenic Escherichia coli K12 marker organism helps assess red meat abattoir hygiene. Improved operative hygiene and tool sterilization significantly reduced contamination, indicating its value for training and practice improvement.
Area of Science:
- Food Safety
- Microbiology
- Veterinary Public Health
Background:
- Assessing hygienic slaughter practices in red meat abattoirs is crucial for public health.
- A reliable marker organism can aid in evaluating and improving contamination control during meat processing.
Purpose of the Study:
- To evaluate a nonpathogenic Escherichia coli K12 strain as a marker organism for assessing hygienic slaughter practices.
- To determine the effectiveness of specific interventions in reducing marker organism contamination on beef and sheep carcases.
Main Methods:
- A nalidixic acid-resistant Escherichia coli K12 strain was used as a marker organism.
- The marker was applied to beef and sheep carcases, and its presence was detected using a specific isolation medium.
- Interventions included bagging the anus, operative hygiene, sterile knife use, and carcase washing.
Main Results:
- Bagging the anus reduced but did not eliminate contamination spread on beef carcases.
- Operative hygiene and sterile knife use significantly reduced sheep carcase contamination (P<0.001).
- Subsequent carcase washing had minimal impact on reducing marker organism levels.
Conclusions:
- The marker organism is valuable for assessing hygiene control in red meat abattoirs.
- Findings support the improvement of current slaughter practices and staff training.
- Specific hygiene interventions, particularly operative cleanliness, are critical for minimizing contamination.