Download Better Understanding of the Campylobacter Conundrum by Amelie Garenaux;Celine Luchetti-miganeh;Gwennola Ermel PDF

By Amelie Garenaux;Celine Luchetti-miganeh;Gwennola Ermel

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Pylori is much more vast, adaptable and interconnected than previously appreciated”. The comparison of oxidative stress resistance related to detoxification and regulation systems present in a strict aerobe (B. subtilis), a facultative anaerobe (E. coli), microaerophilic bacteria (C. jejuni and H. pylori) and anaerobes (C. perfringens and Bacteroides fragilis) are here reviewed to conclude on the C. jejuni legitimacy as an oxidative stress sensitive microorganism. 1. Effect of Atmospheric Oxygen and ROS on Survival Oxygen Tension Aerobiosis constitutes the optimal atmospheric condition for growth of strict aerobes.

Cells taken from the stationary phase were found to be more sensitive to mild heat stress, aeration, and acid than cells of the exponential phase [189, 264]. However, Cappelier et al. [61] reported an increase in heat shock resistance in C. jejuni starved cells which did not occur in presence of a protein synthesis inhibitor. Different physiological modifications were observed when cells of C. jejuni were submitted to starvation. Martinez-Rodriguez et al. [240] pointed out that cells entered into stationary phase display a change in the fatty-acids composition of their membranes.

Coli [413]. In E. coli, this GASP phenotype is related to mutations in the rpoS or lrp gene resulting in attenuated RpoS or inactive LRP, and this increased fitness is dependent on the pH and nutrient environment [107, 417]. In C. jejuni, Martinez-Rodriguez et al. [239] were unable to clearly demonstrate the conventional GASP phenotype as described in E. coli. Nevertheless, the phenotypic changes observed in C. jejuni appeared to be stable because they were maintained in subculture suggesting the emergence of a new strain with advantageous properties in terms of survival in starvation.

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