Home About Browse Search

Salmonella in Swedish cattle

epidemiology and aspects on control

Ågren, Estelle (2017). Salmonella in Swedish cattle. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2017:35
ISBN 978-91-576-8843-9
eISBN 978-91-576-8844-6
[Doctoral thesis]

[img] PDF


In Sweden, all herds detected with salmonella are put under restrictions and measures aiming at eradication are required. The purpose of these studies was to provide a basis for decisions on how surveillance and control of salmonella in Swedish cattle can be made more cost-efficient.

Results from a bulk milk screening were used to investigate seroprevalence of salmonella and to study associations between salmonella status and geographical location, local animal density, number of test positive neighbour herds, animal trade and herd size. Additional information on potential risk factors for salmonella was collected via a questionnaire sent to selected herds. The results confirmed a low prevalence of salmonella in Swedish dairy herds throughout the country, except for an island in the southeast (Öland). Test-positive salmonella status was associated with test-positive neighbours, with a stronger association for herds with indication of infection with the host-adapted S. Dublin, than for those with indication of infection with other serotypes. The results suggest local spread as an important component in transmission of salmonella between herds. Specific factors of importance in this local spread were not identified, suggesting that a broad biosecurity approach is needed in prevention of salmonella. Infection with S. Dublin was associated with herd size, and herd size was in turn associated with type of housing and many management factors, which might affect the persistence of salmonella in a herd.

Costs for implementation of required measures in restricted herds during the years 1999-2013 were on average 0.49 million EUR per farm, with a median of 0.11 EUR, and a range of 1080 EUR to 4.44 million EUR. Larger herds and longer restriction periods were associated with higher costs.

Efficiency of different sampling strategies was evaluated on herd level. The study highlights the importance of considering a herd’s risk of having salmonella when deciding on sampling strategies for different purposes, e.g. surveillance of pre-purchase testing.

Authors/Creators:Ågren, Estelle
Title:Salmonella in Swedish cattle
Subtitle:epidemiology and aspects on control
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :9 March 2017
Depositing date:9 March 2017
Number of Pages:58
IÅgren ECC, Johansson J, Frössling J, Wahlström H, Emanuelson U, Sternberg-Lewerin S (2015). Factors affecting costs for on-farm control of salmonella in Swedish dairy herds. Acta Veterinaria Scandinavica 57(28). doi:10.1186/s13028-015-0118-y
IIÅgren ECC, Sternberg-Lewerin S, Wahlström H, Emanuelson U, Frössling J (2016). Low prevalence of Salmonella in Swedish dairy herds highlight differences between serotypes. Preventive Veterinary Medicine 125, 28-45. doi:10.1016/j.prevetmed.2015.12.015
IIIÅgren ECC, Frössling J, Wahlström H, Emanuelson U, Sternberg Lewerin S. A questionnaire study of risk factors for salmonella infection in a low prevalence population (manuscript).
IVÅgren ECC, Sternberg-Lewerin S, Frössling J. Evaluation of herd level sampling strategies for control of salmonella in Swedish cattle (manuscript).
Place of Publication:Uppsala
Publisher:Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-8843-9
ISBN for electronic version:978-91-576-8844-6
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L73 Animal diseases
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 403 Veterinary Science > Clinical Science
Agrovoc terms:cattle, dairy cows, salmonella, zoonoses, disease control, screening, disease transmission, dairy hygiene, epidemiology, costs, risk factors
Keywords:costs, control, dairy, risk factor, bulk milk, screening, freedom
Permanent URL:
ID Code:14155
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Biomedical Sciences and Veterinary Public Health
External funders:Stiftelsen Lantbruksforskning
Deposited By: Estelle C C Ågren
Deposited On:10 Mar 2017 12:23
Metadata Last Modified:09 Sep 2020 14:17

Repository Staff Only: item control page


Downloads per year (since September 2012)

View more statistics