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Sökning: WFRF:(Helander Björn)

  • Resultat 1-10 av 78
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1.
  • Blomqvist, Maria, et al. (författare)
  • Chlamydia psittaci in birds of prey, Sweden
  • 2012
  • Ingår i: Infection Ecology and Epidemiology. - 2000-8686. ; 2, s. 8435-
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Chlamydia psittaci is an intracellular bacterium primarily causing respiratory diseases in birds but may also be transmitted to other animals, including humans. The prevalence of the pathogen in wild birds in Sweden is largely unknown. Methods: DNA was extracted from cloacae swabs and screened for C. psittaci by using a 23S rRNA gene PCR assay. Partial 16S rRNA and ompA gene fragments were sequence determined and phylogenies were analysed by the neighbour-joining method. Results and conclusion: The C. psittaci prevalence was 1.3% in 319 Peregrine Falcons and White-tailed Sea Eagles, vulnerable top-predators in Sweden. 16S rRNA and ompA gene analysis showed that novel Chlamydia species, as well as novel C. psittaci strains, are to be found among wild birds.
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2.
  • Blomqvist, Maria, et al. (författare)
  • Chlamydophila psittaci in birds of prey, Sweden
  • 2012
  • Ingår i: Infection Ecology & Epidemiology. - : Informa UK Limited. - 2000-8686 .- 2000-8686. ; 2
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Chlamydia psittaci is an intracellular bacterium primarily causing respiratory diseases in birds but may also be transmitted to other animals, including humans. The prevalence of the pathogen in wild birds in Sweden is largely unknown.Methods: DNA was extracted from cloacae swabs and screened for C. psittaci by using a 23S rRNA gene PCR assay. Partial 16S rRNA and ompA gene fragments were sequence determined and phylogenies were analysed by the neighbour-joining method.Results and conclusion: The C. psittaci prevalence was 1.3% in 319 Peregrine Falcons and White-tailed Sea Eagles, vulnerable top-predators in Sweden. 16S rRNA and ompA gene analysis showed that novel Chlamydia species, as well as novel C. psittaci strains, are to be found among wild birds.
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6.
  • Gunnarsson, Gunnar, et al. (författare)
  • Zero Prevalence of Influenza A Virus in Two Raptor Species by Standard Screening
  • 2010
  • Ingår i: Vector-borne and zoonotic diseases. - : Mary Ann Liebert Inc. - 1530-3667 .- 1557-7759. ; 10:4, s. 387-390
  • Tidskriftsartikel (refereegranskat)abstract
    • Disease can have sever impact on animal populations, especially in rare species. Baseline data for atypical host species are missing for a range of infectious diseases, although such hosts are potentially more affected than the normal vectors and reservoir species. If highly pathogenic avian influenza strikes rare birds of prey, this may have crucial impact on the predator species itself, but also on the food web in which it interacts. Here we present the first large-scale screening of raptors that regularly consume birds belonging to the natural reservoir of influenza A viruses. Influenza A virus prevalence was studied in two rare raptors, the white-tailed sea eagle (Haliaetus albicilla) and the peregrine falcon (Falco peregrinus). Nestlings were screened for active (181 white-tailed sea eagles and 168 peregrine falcons) and past (123 white-tailed sea eagles and 6 peregrine falcons) infection in 2006-2007, and an additional 20 succumbed adult white-tailed sea eagles were sampled in 2003-2006. Neither high- nor low-pathogenic influnza infections were found in our sample, but this does not rule out that the former may have major impact on rare raptors and their food webs.
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7.
  • Bignert, Anders, et al. (författare)
  • 9. Contaminants and Health of Aquatic Wildlife
  • 2012. - 1
  • Ingår i: Ecology and Animal Health. - Uppsala : Baltic University Press. - 9789186189129 ; , s. 73-85
  • Bokkapitel (populärvet., debatt m.m.)
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10.
  • Bohlin, Johan, et al. (författare)
  • Örnföda. Mest braxen och gädda
  • 2014
  • Ingår i: Värmlandsornitologen. ; 41, s. 10-13-
  • Tidskriftsartikel (populärvet., debatt m.m.)
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