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Acid Adaptation of Escherichia Coli O157:H7 Increases Survival in Acidic Foods

Overview
Journal Appl Environ Microbiol
Specialties Environmental Health
Microbiology
Date 1995 Oct 1
PMID 7487011
Citations 52
Authors
G J Leyer
L L Wang
E A Johnson
Affiliations
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Abstract

Escherichia coli O157:H7 was adapted to acid by culturing for one to two doublings at pH 5.0. Acid-adapted cells had an increased resistance to lactic acid, survived better than nonadapted cells during a sausage fermentation, and showed enhanced survival in shredded dry salami (pH 5.0) and apple cider (pH 3.4). Acid adaptation is important for the survival of E. coli O157:H7 in acidic foods and should be considered a prerequisite for inocula used in food challenge studies.

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