Experimental study on possible transmission of the bacterium <Emphasis Type="Italic">Erysipelothrix rhusiopathiae</Emphasis> to chickens by the poultry red mite, <Emphasis Type="Italic">Dermanyssus gallinae</Emphasis> |
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Authors: | Sara Brännström Ingrid Hansson Jan Chirico |
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Institution: | (1) Department of Virology, Immunobiology and Parasitology, National Veterinary Institute, 751 89 Uppsala, Sweden;(2) Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, PO Box 7036, 750 07 Uppsala, Sweden;(3) Department of Bacteriology, National Veterinary Institute, 751 89 Uppsala, Sweden |
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Abstract: | The vector potential of the poultry red mite, Dermanyssus gallinae De Geer (Acari: Dermanyssidae), in relation to chicken erysipelas was investigated under experimental conditions. Chickens
were inoculated intramuscularly with the bacterium Erysipelothrix rhusiopathiae, and mites were allowed to feed on the inoculated chickens for 5 days. After 20 days of starvation, the mites were allowed
to feed on healthy chickens to enable transmission of bacteria. Blood samples were collected from the birds and analysed for
the presence of E. rhusiopathiae, and ELISA tests were performed for seropositivity. The internal presence of E. rhusiopathiae in the mites after feeding of inoculated birds was also investigated. It could not be demonstrated that mites take up and
transmit E. rhusiopathiae under the experimental conditions described. However, since there are case reports as well as other in vitro studies indicating
the potential of D. gallinae to act as a reservoir and potential vector for infections agents, we cannot exclude the possibility that the red poultry
mite transmits E. rhusiopathiae between chickens under field conditions. |
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