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Erysipelothrix rhusiopathiae in laying hens

Eriksson, Helena (2013). Erysipelothrix rhusiopathiae in laying hens. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2013:26
ISBN 978-91-576-7791-4
[Doctoral thesis]

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The bacterium Erysipelothrix rhusiopathiae can infect a wide range of mammals (including humans) and birds. Disease outbreaks (erysipelas) have been considered unusual in chickens internationally, but outbreaks with high mortality and egg production losses have been diagnosed in Swedish laying hen flocks every year since 1998.

Different aspects of E. rhusiopathiae infection in chickens were examined in this thesis with the aim of preventing future outbreaks. These aspects included determining occurrence of the bacterium in different housing systems for laying hens and the potential of the poultry red mite (Dermanyssus gallinae) to carry it, characterization of isolates of the bacterium from different hosts using pulsed-field gel electrophoresis (PFGE), serotyping, antimicrobial susceptibility testing and 16S rRNA gene sequencing, and determining the incidence of E. rhusiopathiae in the environment on affected organic laying hen farms by the use of selective culture and PCR.

The results showed an association between erysipelas outbreaks and housing system. Flocks in free-range systems appeared to be at a higher risk than flocks in indoor litter-based systems, while flocks in cages appeared to be at the lowest risk. Dermanyssus gallinae collected from affected flocks was shown to carry E. rhusiopathiae externally and internally, but the reservoir potential of the mite could not be proven. When characterizing E. rhusiopathiae isolates, PFGE proved to be a suitable method for genotypic studies. Investigations of isolates from affected flocks showed that outbreaks appeared to be of a clonal nature and thus caused by introduction of E. rhusiopathiae from a single extraneous source. An external source of infection was also indicated by outbreaks in consecutive flocks caused by different PFGE types. Manure and dust samples collected in affected flocks were shown to contain E. rhusiopathiae and may therefore represent sources of transmission.

Authors/Creators:Eriksson, Helena
Title:Erysipelothrix rhusiopathiae in laying hens
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2013
Number of Pages:64
I.Eriksson, H., Jansson, D.S., Johansson, K.-E., Båverud, V., Chirico, J., Aspán, A. (2009). Characterization of Erysipelothrix rhusiopathiae isolates from poultry, pigs, emus, the poultry red mite and other animals. Veterinary Microbiology, 137, 98-104.
II.Chirico, J., Eriksson, H., Fossum, O., Jansson, D. (2003). The poultry red mite, Dermanyssus gallinae, a potential vector of Erysipelothrix rhusiopathiae causing erysipelas in hens. Medical and Veterinary Entomology, 17, 232-234.
III.Eriksson, H., Brännström, S., Skarin, H., Chirico, J. (2010). Characterization of Erysipelothrix rhusiopathiae isolates from laying hens and poultry red mites (Dermanyssus gallinae) from an outbreak of erysipelas. Avian Pathology, 39, 505-509.
IV.Eriksson, H., Nyman, A.-K., Fellström, C., Wallgren, P. (2013). Erysipelas in laying hens is associated with housing system. Veterinary Record, doi: 10.1136/vr.101388 (In Press)
V.Eriksson, H., Bagge, E., Båverud, V., Fellström, C., Jansson, D.S. Environmental Erysipelothrix rhusiopathiae contamination during erysipelas outbreaks in organic laying hen flocks. (Manuscript)
Place of Publication:Uppsala
Publisher:Dept. of Clinical Sciences, Swedish University of Agricultural Sciences
Associated Programs and Other Stakeholders:SVA - National Veterinary Institute > A contributor is enlisted in SVA
ISBN for printed version:978-91-576-7791-4
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:chickens, erysipelothrix rhusiopathiae, swine erysipelas, bacterioses, antibodies, disease control, animal housing, dermanyssus gallinae, gel electrophoresis, epidemics
Keywords:erysipelas, poultry, chicken, housing, PFGE, serotyping, PCR, antibody, Dermanyssus gallinae, environment
Permanent URL:
ID Code:10388
Department:(VH) > Dept. of Clinical Sciences
External funders:Ekhaga Foundation and Royal Swedish Academy of Agriculture and Forestry and Stiftelsen Albert Hjärre-fonden
Deposited By: Helena Eriksson
Deposited On:06 May 2013 12:15
Metadata Last Modified:02 Dec 2014 11:00

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