Prevalence of cold-tolerant clostridia associated with vacuum-packed beef and lamb stored at abusive and chill temperatures

被引:13
作者
Broda, DM
DeLacy, KM
Cook, RL
Bell, RG
机构
[1] Meat Industry Research Institute of New Zealand, P.O. Box 617, Hamilton
关键词
cold-tolerant clostridia; ''blown pack'' spoilage; chilled storage; vacuum-packed meat;
D O I
10.1080/00288233.1997.9513236
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
A survey was conducted for the presence of cold-tolerant (i.e. capable of growing at less than 5 degrees C) Clostridium spp, in fresh vacuum-packed beef and lamb obtained from nine export meat plants. Prevalence was determined before and after storage at abusive (15 degrees C) and non-abusive (-1.5 degrees C) temperatures, and instances of pack failure by ''blowing'' were recorded. Overall, only three samples (6.7%) were positive for the presence of this group of micro-organisms on initial testing. After storage at 15 degrees C for 8 weeks, cold-tolerant clostridia were found in 51.1% of samples, all of which had ''blown''. After storage at -1.5 degrees C for 12 weeks, only 2 samples (4.4%) accumulated significant amounts of gas, and both contained cold-tolerant clostridia. With vacuum-packed product stored at 15 degrees C, approximately 29% of the clostridial strains isolated at 15 degrees C were cold-tolerant species capable of growing at less than 5 degrees C. However, none of them were able to grow at -1.5 degrees C. Only psychrophilic and psychrotrophic clostridia were isolated from fresh samples and those stored at -1.5 degrees C.
引用
收藏
页码:93 / 98
页数:6
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