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Transmission routes and vector potential of the poultry red mite Dermanyssus gallinae

Brännström, Sara (2010). Transmission routes and vector potential of the poultry red mite Dermanyssus gallinae. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2010:26
ISBN 978-91-576-7503-3
[Doctoral thesis]

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The poultry red mite, Dermanyssus gallinae is a blood-feeding ectoparasite causing irritation, stress, and in severe infection, anemia and death of its avian host. This parasite not only causes welfare problems in poultry but also financial losses in egg production worldwide. The aims of this thesis were to elucidate the transmission routes of D. gallinae to poultry facilities and to investigate the potential of the parasite to be a vector of Erysipelothrix rhusiopathiae, the agent causing poultry erysipelas. Investigation of the 5.8S ribosomal RNA (rRNA) gene and the two internal transcribed spacers (ITS) of D. gallinae from poultry premises and wild birds in Sweden indicates that wild birds are of minor importance in the infection of D. gallinae to poultry farms. Instead there are indications that mites from wild birds in Sweden could be separate species. The transmission of D. gallinae to poultry is therefore most likely to follow another path. Population genetic analysis using the mitochondrial cytochrome oxidase c subunit I (COI) gene as a molecular marker revealed that most farms had a homogenous population of D. gallinae. This investigation included farms from Norway and Sweden and no common haplotype was found across countries. This implies that transmission is connected to the egg-producing system and most likely one or a few common sources of infection are present. However, the exact nature of these sources could not be identified. The bacterium E. rhusiopathiae could be isolated from D. gallinae collected from a farm during an outbreak of poultry erysipelas, and mites and hens were infected by the same bacterial strain. This means that D. gallinae is a potent reservoir of this agent. However, under experimental conditions uptake and transmission could not be demonstrated and therefore the vector competence of D. gallinae with regard to the erysipelas agent is still uncertain. The mite should, however, not be excluded as a potential vector possibly spreading the infection within and between farms.

Authors/Creators:Brännström, Sara
Title:Transmission routes and vector potential of the poultry red mite Dermanyssus gallinae
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2010
Number of Pages:61
ALLI Brännström, S., Morrison, D.A., Mattsson, J.G. & Chirico, J. (2008). Genetic differences in internal transcribed spacer 1 between Dermanyssus gallinae from wild birds and domestic chickens. Medical and Veterinary Entomology 22, 152-155. II Øines, Ø. & Brännström, S. (2010) Molecular investigations of cytocrome oxidase c subunit 1 (CO1) and the internal transcribed spacer (ITS) of the poultry red mite Dermanyssus gallinae (DeGeer) in Northern Europe, with implication for its transmission between layer farms (manuscript). 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 (Submitted manuscript). IV Brännström, S., Hansson, I. & Chirico, J. (2010). Experimental study on possible transmission of the bacterium Erysipelothrix rhusiopathiae to chickens by the poultry red mite Dermanyssus gallinae. Experimental and Applied Acarology 50, 299-307.
Place of Publication:Uppsala
ISBN for printed version:978-91-576-7503-3
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:dermanyssus gallinae, layer chickens, mite control, disease transmission, Erysipelothrix, vectors, laying performance
Keywords:Dermanyssus gallinae, poultry red mite, laying hens, transmission, ITS, CO1, vector, reservoir, poultry erysipelas, Erysipelothrix rhusiopathiae
Permanent URL:
ID Code:2261
Department:(VH) > Dept. of Biomedical Sciences and Veterinary Public Health
Deposited By: Sara Brännström
Deposited On:30 Mar 2010 00:00
Metadata Last Modified:02 Dec 2014 10:17

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