henk van der jeugd vogeltrekstation dutch centre for avian...
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Wild birds and zoonosesHenk van der Jeugd
Vogeltrekstation – Dutch centre for Avian Migration and Demography NIOO-KNAW
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Wild birds as reservoirs and vectors of disease
• Japanese encephalitis
• Newcastle disease
• West Nile virus
• Avian Influenza
• Trichomonas
• Tick-borne diseases:• Borrelia burgdorferi (Lyme disease)
• tickborne encephalitis
• Crimean-Congo haemorrhagic fever
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WNV in USA
• Outbreak New York 1999
• Spread across United States
• Initital spread through South-North migration corridor
• Subsequent spread to West unclear
• Surveillance program forWNV in birds
WNV wild bird surveillance 2014Positive samples
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West Nile Virus in the Netherlands?
• Not yet…
• Outbreaks in 2010 in Greece, and Russia
• Isolated cases in Portugal, Spain, Hungary and italy
• Surveillance program not yet installed
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Sand martin with Ixodes ricinus tick Hyalomma marginatum tick
Tropical ticks: Hylomma marginatum
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Occurrence of Hyalomma ticks in the Netherlands
• 2 recent cases of Hyalomma ticks on horses
• 1 human case in 2012 in Limburg
• 2012: pilot project• Bird ringers collect ticks on migrant birds
• 5 locations in Netherlands
• 66 specimens sent to CMV of nVWA
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Collecting ticks from long-distance migrating birds. Centrum Monitoring Vectoren (CMV) van nVWA.
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Hyalomma marginatum found on reed warbler5 June 2012Just outside Oostvaardersplassen
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The effect of climate warming
Van Hemert et al 2014 Frontiers in Ecology
Figure 4. Conceptual model of climate-related impacts on avian disease dynamics in the Arctic
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Avian Influenza virusesWild waterbirds are the natural reservoirs of low pathogenic avian influenza A viruses (LPAIV)
Reperant 2010
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Avian Influenza virusesWild waterbirds are the natural reservoirs of low pathogenic avian influenza A viruses (LPAIV)
9-H and 16-N subtypes, nearly all subtypes have been isolated in waterfowl
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Latorre-Margalef et al. 2014
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Avian Influenza virusesWild waterbirds are the natural reservoirs of low pathogenic avian influenza A viruses (LPAIV)
9-H and 16-N subtypes, nearly all subtypes have been isolated in waterfowl
LPAIV can spread from wild birds into poultry farms
In poultry farms, H5 and H7 variants capable of developing into high pathogenic avian influenza A viruses (HPAIV)
HPAIV viruses –rarely- spill back into wild birds
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• Transmission of HPAI mainlythrough respiratory tract
• Exact transmission unknown
• Fatal to many wild birds, but some dabbling ducks show no signs of disease
Reperant 2010
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Reperant 2010
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7 flyways of migratory birds
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Qinghai Lake
Poyang Lake
Takekawa et al. (2010) Avian Diseases
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H5N8 in wild birds 2014-15
Verhagen, van der Jeugd, Nolet, Kharitonov et al. in prep
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Dusek RJ, Hallgrimsson GT, Ip HS, Jónsson JE, et al. (2014)
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Figure 1. Viruses recovered from Iceland wild birds in 2010–2011 with segment lineage detail.
Dusek RJ, Hallgrimsson GT, Ip HS, Jónsson JE, et al. (2014)
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Kleyheeg et al.
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1 km
a
Kleyheeg et al.
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Kleyheeg et al.
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Kleyheeg et al.
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A role for citizen science
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© Jouke Altenburg
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© Peter Das
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© Jouke Altenburg
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Thank you for your attention