2026-04-21T12:05:57Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/92842024-06-19T00:05:15Zcom_10259_4292com_10259_5086com_10259_2604col_10259_4293

00925njm 22002777a 4500 dc Ortega Sanz, Irene author Bocigas, Carolina author Melero Gil, Beatriz author Rovira Carballido, Jordi author 2024-02 The high incidence and prevalence of Campylobacter spp. in the food supply chain entail the importance to understand their mechanisms developed to withstand harsh environmental conditions encountered. Different stress conditions and phenotypic approaches were evaluated to study the behaviour of five clinical C. jejuni isolates with different genotypes, including the tolerance to oxygen and the oxidants hydrogen peroxide and cumene hydroperoxide, the motility and the ability to form biofilm on polystyrene and stainless steel at different temperatures and atmospheres. Whole Genome Sequencing was performed to analyse the occurrence of 216 genes involved in these mechanisms plus phase variation. The isolates showed high tolerance to oxygen and peroxide stress with different swimming motility performances and biofilm formation abilities. Aerotolerance was related with a reduced sensitive to peroxide stress and a loss of motility that promotes biofilm formation depending on the material surface. Comparative genomics did not reveal any clear gene pattern, although phase variation occurring during host infection was observed to be crucial for the modulation of the different survival mechanisms adopted by the bacteria. These findings reveal that the bacteria can combine diverse and complex strategies in an efficient manner to survive and persist in the environment. 0740-0020 http://hdl.handle.net/10259/9284 10.1016/j.fm.2023.104397 Campylobacteriosis Aerotolerance Oxidative stress Motility Biofilm formation Genomics Phase variation modulates the multi-phenotypes displayed by clinical Campylobacter jejuni strains