Bolder, N.

Borck Høg, Birgitte

Cerda-Cuellar, M.

David, B.

Dolza, R.

Hofshagen, M.

Jonsson, M.

Merga, J.Y.

Osek, J.

Rosenquist, Hanne

Sommer, Helle Mølgaard

Urdaneta, S.

Wagenaar, J.A.

Wieczorek, K.

Williams, Nicola

Online Research Database In Technology

                       General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.  • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal   If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.     Downloaded from orbit.dtu.dk on: Nov 08, 2017Risk factors for Campylobacter infection of broiler flocksSommer, Helle Mølgaard; Borck Høg, Birgitte; Williams, Nicola; Merga, J.Y. ; Cerda-Cuellar, M.;Urdaneta, S.; Dolza, R. ; Wieczorek, K.; Osek, J.; David, B. ; Jonsson, M. ; Hofshagen, M. ; Wagenaar,J.A. ; Bolder, N. ; Rosenquist, HannePublished in:Book of Abstracts. DTU's Sustain Conference 2015Publication date:2015Document VersionPublisher's PDF, also known as Version of recordLink back to DTU OrbitCitation (APA):Sommer, H. M., Borck Høg, B., Williams, N., Merga, J. Y., Cerda-Cuellar, M., Urdaneta, S., ... Rosenquist, H.(2015). Risk factors for Campylobacter infection of broiler flocks. In Book of Abstracts. DTU's SustainConference 2015 [Q-14] Lyngby: Technical University of Denmark (DTU).   Risk factors for Campylobacter infection of broiler flocks   Helle M Sommer*1, B.B. Høg2, N.Williams3, J.Y. Merga4, M.Cerdà-Cuélla4, S. Urdaneta4 ,R.Dolza4 ,K. Wieczorek5, J. Osek5, B. David6, M. Jonsson6, M. Hofshagen6, J.A. Wagenaar7, N. Bolder7, H. Rosenquist2 1: DTU Compute; 2: DTU Food; 3: University of Liverpool; 4: University of Barcelona; 5: Veterinary Institute of Poland; 6: Veterinary Institute of Norway; 7: University of Utrect *Corresponding author email: hems@dtu.dk  Campylobacteriosis has become the leading bacterial zoonosis in humans in the European Union and other developed countries. There are many sources of human Campylobacter infections, but broilers and broiler meat have been shown to be the most important sources. The objective of the study was to identify on-farm risk factors for Campylobacter colonization of broiler flocks based on comparable data from six European countries. The data included explanatory variables from a large questionnaire concerning production, farm management procedures and conditions, climate data on mean temperature, sunshine hours, precipitation, as well as data on Campylobacter status of broiler flocks. Overall, the study comprised data from more than 6000 flocks. The data were analyzed using a generalized linear model using backwards elimination and forward selection. Due to the structure of the data, several model approaches were explored, by applying different strategies for categorizing explanatory variables and for selection and elimination of variables in the model.  The risk of broiler flocks becoming colonized with Campylobacter was clearly affected by country. In descending order; broiler flocks were more likely to be colonized in Poland, UK, Spain, the Netherlands, Denmark and Norway due to country specific factors that could not be explained by the management, physical conditions or climate variables in the explored models. The seasonality in the prevalence of Campylobacter was described nicely by temperature, i.e. the number of positive flock increased with increasing temperatures. The age of broiler houses, presence of anterooms and barriers in all houses, designated tools for each house as well as length of downtime and the type of drinker systems were found to affect the risk of the broiler flocks becoming colonized by Campylobacter. In the figure some of the risk factors are shown. Sustain DTU Abstract: Q-14

Risk factors for Campylobacter infection of broiler flocks

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Risk factors for Campylobacter infection of broiler flocks

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