家禽气冷过程中的微生物交叉污染。

Microbial cross-contamination during air chilling of poultry.

Mead G C, Allen V M, Burton C H, Corry J E

Royal Veterinary College, University of London, Potters Bar, England, UK.

Br Poult Sci. 2000 May;41(2):158-62. doi: 10.1080/713654915.

Abstract

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 sprays. 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.

摘要

以一株耐萘啶酸的大肠杆菌K12作为指示菌，对禽胴体风冷过程中的交叉污染进行了研究。2. 实验在两种商用冷却器上进行，一种使用喷水（蒸发冷却），另一种不使用喷水，还在一台中试规模的冷却器上进行，该冷却器的条件可根据需要进行变化。3. 在商用冷却器中，指示菌从单个接种的胴体向各个方向扩散，使用氯化水喷淋会增加传播。4. 中试规模的冷却器也得到了类似结果，在那里从54个未接种的胴体中的45个中检测到了指示菌；用含有50毫克/升游离有效氯的水喷淋胴体并不能防止交叉污染。5. 尽管微生物很容易从接种的胴体传播，但风冷过程中的交叉污染可能比家禽加工早期阶段的交叉污染要少，因为早期胴体污染更严重。