The acid tolerance response of Salmonella typhimurium provides protection against organic acids
Article Abstract:
Salmonella typhimurium exhibits acid tolerance responses (ATRs) when exposed to low pH levels and non-acidic environments during pathogenesis. The exposure of Salmonella typhimurium butyric, acetic and propionic acids activate complex ATR defense mechanism which reduced pH-related damage. Furthermore, the ATR mechanism of the microbe was activated upon exposure to environments with a pH of 4.4. However, the efficiency of the ATR mechanism in Salmonella typhimurium was affected by mutations in the rpoS and fur genes.
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 1996
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Mechanisms of acid resistance in enterohemorrhagic Escherichia coli
Article Abstract:
The glutamate-dependent system and the acid-induced arginine-dependent system protect enterohemorrhagic Escherichia coli against the bactericidal effects of acids in the stomach and intestine. The acid-induced oxidative system is less effective. The arginine- and the glutamate-dependent systems are effective against weak acids such as benzoic acid and a volatile fatty acid mixture. The acid resistance systems remain effective for prolonged periods of cold storage at four degree celsius.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
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The rpoS-dependent starvation-stress response locus stiA encodes a nitrate reductase (narZYWV) required for carbon-starvation-inducible thermotolerance and acid tolerance in Salmonella typhimurium
Article Abstract:
Research was conducted to identify the enzymes involved in the long-term-starvation survival of Salmonella typhimurium. Results indicate that nitrate reductase enzyme, regulated by narZYWV operon, plays a central role in the physiology of starved and stressed cells.
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 1999
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