Acid stress, starvation, and cold stress affect poststress behavior of Escherichia coli O157:H7 and onpathogenic Escherichia coli

被引：82

作者：

Leenanon, B ^{[1
]}

Drake, MA ^{[1
]}

机构：

[1] Mississippi State Univ, SE Dairy Foods Res Ctr, Dept Food Sci & Technol, Mississippi State, MS 39762 USA

来源：

JOURNAL OF FOOD PROTECTION | 2001年 / 64卷 / 07期

关键词：

D O I：

10.4315/0362-028X-64.7.970

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

The effects of acid shock. acid adaptation, starvation, and cold stress of Escherichia coli O157:H7 (ATCC 43895), an rpoS mutant (FRIK 816-3), and nonpathogenic E. Loll (ATCC 25922) on poststress heat resistance and freeze-thaw resistance were investigated. Following stress, heat tolerance at 56 degreesC and freeze-thaw resistance at -20 to 21 degreesC were determined. Heat and freeze-thaw resistance of E. coli O157:H7 and nonpathogenic E. coli was enhanced after acid adaptation and starvation. Following cold stress, heat resistance of E. coli O157:H7 and nonpathogenic E. coli was decreased, while freeze-thaw resistance was increased. Heat and freeze-thaw resistance of the rpoS mutant was enhanced only after acid adaptation. Increased or decreased tolerance of acid-adapted. starved, or cold-stressed E. coli O157:H7 cells to heat or freeze-thaw processes should be considered when processing minimally processed or extended shelf-life foods.

引用

页码：970 / 974

页数：5

共 46 条

[1] Microbial stress response in minimal processing [J].