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]
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525kB |
Abstract
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 | ||||||||||
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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: | 2017:35 | ||||||||||
Number of Pages: | 58 | ||||||||||
Papers/manuscripts: |
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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 | ||||||||||
ISSN: | 1652-6880 | ||||||||||
Language: | English | ||||||||||
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 | ||||||||||
URN:NBN: | urn:nbn:se:slu:epsilon-e-4007 | ||||||||||
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4007 | ||||||||||
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 |
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