Journal
BRITISH POULTRY SCIENCE
Volume 41, Issue 2, Pages 158-162Publisher
CARFAX PUBLISHING
DOI: 10.1080/713654915
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1. Cross-contamination during air chilling of poultry carcases was investigated using a nalidixic acid-resistant strain of Escherichia coli K12 as a marker organism. 2. Experiments were carried out on 2 types of commercial chiller, with and without the use of water sprays (evaporative cooling), and a pilot-scale chiller in which conditions could be varied as required. 3. In the commercial chillers, the marker was dispersed in all directions from a single inoculated carcase and transmission was increased by the use of chlorinated water splays. 4. Similar results were obtained with the pilot-scale chiller; where the marker was recovered from 45/54 uninoculated carcases; cross-contamination was not prevented by spraying carcases with water containing 50 mg/l of free available chlorine. 5. Despite the ease of microbial transmission from inoculated carcases, cross-contamination during air chilling is likely to be less than that occurring at earlier stages of poultry processing, when carcases are more heavily contaminated.
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