Publications by authors named "Jesper Johannes Madsen"

Beginning in late 2017, highly pathogenic avian influenza (HPAI) H5N6 viruses caused outbreaks in wild birds and poultry in several European countries. H5N6 viruses were detected in 43 wild birds found dead throughout Denmark. Most of the Danish virus-positive dead birds were found in the period from February to April 2018.

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A mortality event at the Christiansø colony in the Baltic proper killed 115 common eiders (Somateria mollissima) in mid-May 2016. To complement previous studies of incubating females, 39 males were necropsied and from a subsample of these a biochemical and haematological profile was obtained. The birds were emaciated and cachexic having a 50% reduction in body mass.

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Background: Reducing the occurrence of campylobacteriosis is a food safety issue of high priority, as in recent years it has been the most commonly reported zoonosis in the EU. Livestock farms are of particular interest, since cattle, swine and poultry are common reservoirs of Campylobacter spp. The farm environment provides attractive foraging and breeding habitats for some bird species reported to carry thermophilic Campylobacter spp.

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In Denmark and Greenland, extensive surveillance of avian influenza (AI) viruses in wild bird populations has been conducted from 2007 through 2010. In Denmark, the surveillance consisted of passive surveillance of wild birds found dead or sick across Denmark and active surveillance of apparently healthy live birds in waterfowl reservoirs and along migratory flyways, birds living in proximity to domestic poultry, and hunted game birds. Dead birds were sampled by oropharyngeal swabbing.

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Synopsis of recent research by authors named "Jesper Johannes Madsen"

  • - Jesper Johannes Madsen's research focuses on avian health and the impact of infectious diseases on wild bird populations in Denmark, particularly examining outbreaks of highly pathogenic avian influenza (HPAI) and Campylobacter, as well as assessing health metrics in bird species during mortality events.
  • - His study published in 2021 on HPAI H5N6 provides a detailed molecular characterization of viruses detected in Denmark, revealing significant outbreaks among wild birds, while works from 2016 and 2019 explore the health and impact of various pathogens on species such as common eiders.
  • - Madsen's findings underscore the interconnectedness of wildlife and human health, as seen in his research addressing Campylobacter prevalence on livestock farms, which contributes to understanding food safety and zoonotic disease transmission.