Genome-wide fitness analyses of the foodborne pathogen Campylobacter jejuni in in vitro and in vivo models

de Vries, S. P.W. et al. (2017) Genome-wide fitness analyses of the foodborne pathogen Campylobacter jejuni in in vitro and in vivo models. Scientific Reports, 7, 1251. (doi: 10.1038/s41598-017-01133-4) (PMID:28455506) (PMCID:PMC5430854)

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Campylobacter is the most common cause of foodborne bacterial illness worldwide. Faecal contamination of meat, especially chicken, during processing represents a key route of transmission to humans. There is a lack of insight into the mechanisms driving C. jejuni growth and survival within hosts and the environment. Here, we report a detailed analysis of C. jejuni fitness across models reflecting stages in its life cycle. Transposon (Tn) gene-inactivation libraries were generated in three C. jejuni strains and the impact on fitness during chicken colonisation, survival in houseflies and under nutrient-rich and -poor conditions at 4 °C and infection of human gut epithelial cells was assessed by Tn-insertion site sequencing (Tn-seq). A total of 331 homologous gene clusters were essential for fitness during in vitro growth in three C. jejuni strains, revealing that a large part of its genome is dedicated to growth. We report novel C. jejuni factors essential throughout its life cycle. Importantly, we identified genes that fulfil important roles across multiple conditions. Our comprehensive screens showed which flagella elements are essential for growth and which are vital to the interaction with host organisms. Future efforts should focus on how to exploit this knowledge to effectively control infections caused by C. jejuni.

Item Type:Articles
Additional Information:This work was funded by Biotechnology and Biological Sciences Research Council ( grant BB/K004514/1. D.P.W. was funded by a Wellcome Trust ( Infection and Immunity PhD rotation studentship.
Glasgow Author(s) Enlighten ID:Everest, Dr Paul and Humphrey, Dr Suzie
Authors: de Vries, S. P.W., Gupta, S., Baig, A., Wright, E., Wedley, A., Jensen, A. N., Lora, L. L., Humphrey, S., Skovgård, H., Macleod, K., Pont, E., Wolanska, D. P., L'Heureux, J., Mobegi, F. M., Smith, D. G.E., Everest, P., Zomer, A., Williams, N., Wigley, P., Humphrey, T., Maskell, D. J., and Grant, A. J.
College/School:College of Medical Veterinary and Life Sciences > School of Infection & Immunity
College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine
Journal Name:Scientific Reports
Publisher:Nature Publishing Group
ISSN (Online):2045-2322
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Scientific Reports 7: 1251
Publisher Policy:Reproduced under a Creative Commons License

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