Know more

About cookies

What is a "cookie"?

A "cookie" is a piece of information, usually small and identified by a name, which may be sent to your browser by a website you are visiting. Your web browser will store it for a period of time, and send it back to the web server each time you log on again.

Different types of cookies are placed on the sites:

  • Cookies strictly necessary for the proper functioning of the site
  • Cookies deposited by third party sites to improve the interactivity of the site, to collect statistics

Learn more about cookies and how they work

The different types of cookies used on this site

Cookies strictly necessary for the site to function

These cookies allow the main services of the site to function optimally. You can technically block them using your browser settings but your experience on the site may be degraded.

Furthermore, you have the possibility of opposing the use of audience measurement tracers strictly necessary for the functioning and current administration of the website in the cookie management window accessible via the link located in the footer of the site.

Technical cookies

Name of the cookie


Shelf life

CAS and PHP session cookies

Login credentials, session security



Saving your cookie consent choices

12 months

Audience measurement cookies (AT Internet)

Name of the cookie


Shelf life


Trace the visitor's route in order to establish visit statistics.

13 months


Store the anonymous ID of the visitor who starts the first time he visits the site

13 months


Identify the numbers (unique identifiers of a site) seen by the visitor and store the visitor's identifiers.

13 months

About the AT Internet audience measurement tool :

AT Internet's audience measurement tool Analytics is deployed on this site in order to obtain information on visitors' navigation and to improve its use.

The French data protection authority (CNIL) has granted an exemption to AT Internet's Web Analytics cookie. This tool is thus exempt from the collection of the Internet user's consent with regard to the deposit of analytics cookies. However, you can refuse the deposit of these cookies via the cookie management panel.

Good to know:

  • The data collected are not cross-checked with other processing operations
  • The deposited cookie is only used to produce anonymous statistics
  • The cookie does not allow the user's navigation on other sites to be tracked.

Third party cookies to improve the interactivity of the site

This site relies on certain services provided by third parties which allow :

  • to offer interactive content;
  • improve usability and facilitate the sharing of content on social networks;
  • view videos and animated presentations directly on our website;
  • protect form entries from robots;
  • monitor the performance of the site.

These third parties will collect and use your browsing data for their own purposes.

How to accept or reject cookies

When you start browsing an eZpublish site, the appearance of the "cookies" banner allows you to accept or refuse all the cookies we use. This banner will be displayed as long as you have not made a choice, even if you are browsing on another page of the site.

You can change your choices at any time by clicking on the "Cookie Management" link.

You can manage these cookies in your browser. Here are the procedures to follow: Firefox; Chrome; Explorer; Safari; Opera

For more information about the cookies we use, you can contact INRAE's Data Protection Officer by email at or by post at :


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

Last update: May 2021

Menu Logo Principal Oniris

Home page

Simon Nusinovici

Infection with the Bluetongue virus serotype 8 and performance in dairy cattle herds

Abstract :

The Bluetongue virus serotype 8 (BTV-8) emerged in northern Europe in 2006 causing economic losses in cattle herds. Vaccination has been implemented in France without ex ante evaluation of the risk-benefit ratio. No estimation of losses due to the disease and possible vaccination adverse effects has been performed. The objectives of this thesis were (1) to quantify the average effects of exposure to BTV-8 in dairy herds on milk production and reproductive performance of dairy cows, (2) to quantify the effect of vaccination on fertility and (3) to evaluate whether variation in fertility could contribute to the description of the epizootic spread. The effects of exposure and vaccination were quantified using multivariable statistical models which allowed to take into account known factors that influence performance. Exposure to BTV-8 in dairy herds was associated with an important decrease in fertility and milk production, and with an important increase in abortion risk. Losses increased with the proportion of infected neighbouring herds and decreased when the disease detection was late during the epizootic. The vaccination against BTV-8 using inactivated vaccines was associated with a slight decrease in fertility which had a very limited impact compared to the impact of exposure. A decrease in fertility in non case herds located in the exposed area indicated that some of these herds were infected during the 2007 epizootic. These results could contribute to the evaluation of BTV control measures and surveillance.

Key words :

Bluetongue, dairy cows, performance, epidemiology, statistical models, vaccination

Download documents