Know more

Our use of cookies

Cookies are a set of data stored on a user’s device when the user browses a web site. The data is in a file containing an ID number, the name of the server which deposited it and, in some cases, an expiry date. We use cookies to record information about your visit, language of preference, and other parameters on the site in order to optimise your next visit and make the site even more useful to you.

To improve your experience, we use cookies to store certain browsing information and provide secure navigation, and to collect statistics with a view to improve the site’s features. For a complete list of the cookies we use, download “Ghostery”, a free plug-in for browsers which can detect, and, in some cases, block cookies.

Ghostery is available here for free:

You can also visit the CNIL web site for instructions on how to configure your browser to manage cookie storage on your device.

In the case of third-party advertising cookies, you can also visit the following site:, offered by digital advertising professionals within the European Digital Advertising Alliance (EDAA). From the site, you can deny or accept the cookies used by advertising professionals who are members.

It is also possible to block certain third-party cookies directly via publishers:

Cookie type

Means of blocking

Analytical and performance cookies

Google Analytics

Targeted advertising cookies


The following types of cookies may be used on our websites:

Mandatory cookies

Functional cookies

Social media and advertising cookies

These cookies are needed to ensure the proper functioning of the site and cannot be disabled. They help ensure a secure connection and the basic availability of our website.

These cookies allow us to analyse site use in order to measure and optimise performance. They allow us to store your sign-in information and display the different components of our website in a more coherent way.

These cookies are used by advertising agencies such as Google and by social media sites such as LinkedIn and Facebook. Among other things, they allow pages to be shared on social media, the posting of comments, and the publication (on our site or elsewhere) of ads that reflect your centres of interest.

Our EZPublish content management system (CMS) uses CAS and PHP session cookies and the New Relic cookie for monitoring purposes (IP, response times).

These cookies are deleted at the end of the browsing session (when you log off or close your browser window)

Our EZPublish content management system (CMS) uses the XiTi cookie to measure traffic. Our service provider is AT Internet. This company stores data (IPs, date and time of access, length of the visit and pages viewed) for six months.

Our EZPublish content management system (CMS) does not use this type of cookie.

For more information about the cookies we use, contact INRA’s Data Protection Officer by email at or by post at:

24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

Menu Logo Principal Oniris

Home page

PhD thesis of Vicky Bronnec (2013-2016)

Vicky Bronnec
Study of oxidative stress response in Campylobacter jejuni: example of C. jejuni Bf an aerotolerant strain (M. Zagorec, O. Tresse et N. Haddad)


Campylobacter jejuni is leading cause of bacterial foodborne infections in the world. This pathogen is able to survive in various environments. From the digestive tract of poultry, its natural reservoir, to the consumer's plate, C. jejuni must develop several mechanisms to survive in hostile environments. Biofilm formation is an adaptive strategy to survive in these environments and under aerobic conditions. A clinical strain (C. jejuni Bf), isolated in our laboratory, has the unique feature in the species to grow aerobically. It has been used as a model to better describe the mechanisms of stress resistance in C. jejuni.
Bf has a high capacity to adhere to biotic and abiotic surfaces. This strain is able to develop a biofilm in both aerobic and microaerobic conditions and the CosR regulator implicated in oxidative stress response is overexpressed in aerobiosis. Its ability to develop a biofilm seems constitutive independently on aeration conditions, unlike other strains. The sequence of its genome does not reveal unique gene. However, some features seem to be shared only with few other strains, especially C. jejuni ATCC 33560 a non-aerotolerant strain. Within the remarkable differences in the genome of C. jejuni Bf, we noticed the presence of a type VI secretion system, a mutation point in the oorD gene, an insertion upstream dnaK gene. This suggests that the phenotype of C. jejuni Bf could only result from some changes and different regulation by CosR.

Valorisation :

  • Bronnec, V., N. Haddad, S. Cruveiller, M. Hernould, O. Tresse and M. Zagorec 2016. Draft Genome Sequence of Campylobacter jejuni Bf, an Atypical Strain Able To Grow under Aerobiosis. Microbiology Resource Announcements 4(2 e00120-16): 1-2. Ranking du JCR: absent du JCR®.
  • Bronnec, V., H. Turonova, A. Bouju, S. Cruveiller, R. Rodrigues, K. Demnerova, O. Tresse, N. Haddad and M. Zagorec 2016. Adhesion, biofilm formation, and genomic features of Campylobacter jejuni Bf, an atypical strain able to grow under aerobic conditions. Frontiers in Microbiology 7: 1-14. Ranking du JCR: Q1.