NDLI: Heat stress adaptation induces cross-protection against lethal acid stress conditions in Arcobacter butzleri but not in Campylobacter jejuni.

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Heat stress adaptation induces cross-protection against lethal acid stress conditions in Arcobacter butzleri but not in Campylobacter jejuni.

Year: 2013 Volume: 34 Issue: 1

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Heat stress adaptation induces cross-protection against lethal acid stress conditions in Arcobacter butzleri but not in Campylobacter jejuni.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Isohanni, Pauliina Huehn, Stephan Aho, Tommi Alter, Thomas Lyhs, Ulrike
Description	Country affiliation: Finland Author Affiliation: Isohanni P ( Ruralia Institute, Seinäjoki Unit, University of Helsinki, Kampusranta 9C, FI-60320 Seinäjoki, Finland. pauliina.isohanni@helsinki.fi)
Abstract	The ability of many bacteria to adapt to stressful conditions may later protect them against the same type of stress (specific adaptive response) or different types of stresses (multiple adaptive response, also termed cross-protection). Arcobacter butzleri and Campylobacter jejuni are close phylogenetic relatives that occur in many foods of animal origin and have been linked with human illness (mainly diarrhoea). In the present study, sublethal stress adaptation temperatures (48 °C and 10 °C) and mild and lethal acid conditions (pH 5.0 and pH 4.0) were determined for A. butzleri and C. jejuni. In addition, it was evaluated whether these sublethal stress adaptations cause specific adaptive responses or cross-protection against subsequent mild or lethal acid stresses in these bacteria. The studies were conducted in broth adjusted to the different conditions and the results were determined by the dilution series plating method. It was shown that heat stress adapted A. butzleri (incubated for 2 h at 48 °C) were significantly more resistant to subsequent lethal acid stress (pH 4.0) than non-adapted cells at the 1 h time-point (p < 0.01 in Wilcoxon rank sum test). No specific adaptive responses against the stresses in A. butzleri or C. jejuni and no cross-protection in C. jejuni were found. The ability of heat stressed A. butzleri to tolerate later lethal acid conditions should be taken into account when designing new food decontamination and processing strategies.
File Format	HTM / HTML
ISSN	07400020
Issue Number	2
Volume Number	34
e-ISSN	10959998
Journal	Food Microbiology
Language	English
Publisher	Elsevier
Publisher Date	2013-06-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Microbiology Discipline Nutritional Sciences Acids Pharmacology Arcobacter Physiology Campylobacter Jejuni Adaptation, Physiological Drug Effects Hot Temperature Hydrogen-ion Concentration Microbial Viability Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Microbiology Food Science

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Heat stress adaptation induces cross-protection against lethal acid stress conditions in Arcobacter butzleri but not in Campylobacter jejuni.

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