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USA - 1 new outbreak of highly pathogenic avian influenza virus H5N1 in American wigeon, Whatcom, Washington (OIE, April 15, 2015)

Pathfinder

Editor, Senior Moderator
[TABLE="class: TableChoisir, border: 0, cellpadding: 0, cellspacing: 0"]
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[TD="align: left"] Highly pathogenic avian influenza,
United States of America
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[TD="width: 1%, align: right"] [/TD]
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[TD] [TABLE="class: TableChoisir, border: 0, cellpadding: 0, cellspacing: 0"]
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[TD="class: topbigtabletitle27"]Information received on 15/04/2015 from Dr John Clifford, Deputy Administrator, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America[/TD]
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[/TD]
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[TR]
[TD]Summary [TABLE="class: TableFoyers, width: 917"]
[TR]
[TD="class: filtrer_th, width: 10%"]Report type[/TD]
[TD="width: 30%"]Follow-up report No. 7[/TD]
[/TR]
[TR]
[TD="class: filtrer_th, width: 10%"]Date of start of the event[/TD]
[TD="width: 30%"]16/01/2015[/TD]
[/TR]
[TR]
[TD="class: filtrer_th, width: 10%"]Date of confirmation of the event[/TD]
[TD="width: 30%"]16/01/2015[/TD]
[/TR]
[TR]
[TD="class: filtrer_th, width: 10%"]Report date[/TD]
[TD="width: 30%"]15/04/2015[/TD]
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[TR]
[TD="class: filtrer_th, width: 10%"]Date submitted to OIE[/TD]
[TD="width: 30%"]15/04/2015[/TD]
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[TD="class: filtrer_th, width: 10%"]Reason for notification[/TD]
[TD="width: 30%"]Reoccurrence of a listed disease[/TD]
[/TR]
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[TD="class: filtrer_th, width: 10%"]Date of previous occurrence[/TD]
[TD="width: 30%"]2004[/TD]
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[TD="class: filtrer_th, width: 10%"]Manifestation of disease[/TD]
[TD="width: 30%"]Sub-clinical infection[/TD]
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[TD="class: filtrer_th, width: 10%"]Causal agent[/TD]
[TD="width: 30%"]Highly pathogenic avian influenza virus[/TD]
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[TD="class: filtrer_th, width: 10%"]Serotype[/TD]
[TD="width: 30%"]H5N1[/TD]
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[TD="class: filtrer_th, width: 10%"]Nature of diagnosis[/TD]
[TD="width: 30%"]Laboratory (advanced)[/TD]
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[TD="class: filtrer_th, width: 10%"]This event pertains to[/TD]
[TD="width: 30%"]a defined zone within the country[/TD]
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[TD="class: filtrer_th ta_left, width: 10%"]Related reports[/TD]
[TD="width: 30%"]Immediate notification (20/01/2015)
Follow-up report No. 1 (03/02/2015)
Follow-up report No. 2 (13/02/2015)
Follow-up report No. 3 (25/02/2015)
Follow-up report No. 4 (05/03/2015)
Follow-up report No. 5 (20/03/2015)
Follow-up report No. 6 (08/04/2015)
Follow-up report No. 7 (15/04/2015)[/TD]
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[TD]New outbreaks (1)[/TD]
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[TD] [TABLE="class: TableFoyers, width: 917"]
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[TD="class: filtrer_th ta_left, align: left"]Outbreak 1[/TD]
[TD="class: filtrer_th ta_left"]Whatcom County, Whatcom, WASHINGTON[/TD]
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[TD="class: filtrer_th ta_left"]Date of start of the outbreak[/TD]
[TD]05/03/2015[/TD]
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[TD="class: filtrer_th ta_left"]Outbreak status[/TD]
[TD]Continuing (or date resolved not provided)[/TD]
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[TD="class: filtrer_th ta_left"]Epidemiological unit[/TD]
[TD]Not applicable[/TD]
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[TD="class: filtrer_th ta_left"]Affected animals[/TD]
[TD] [TABLE="class: TableFoyers, width: 680"]
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[TD="class: filtrer_th ta_center last"]Species[/TD]
[TD="class: filtrer_th ta_center last"]Susceptible[/TD]
[TD="class: filtrer_th ta_center last"]Cases[/TD]
[TD="class: filtrer_th ta_center last"]Deaths[/TD]
[TD="class: filtrer_th ta_center last"]Destroyed[/TD]
[TD="class: filtrer_th ta_center last"]Slaughtered[/TD]
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[TD]American wigeon:Anas americana(Anatidae)[/TD]
[TD="class: ta_right"] [/TD]
[TD="class: ta_right"] [/TD]
[TD="class: ta_right"] [/TD]
[TD="class: ta_right"] [/TD]
[TD="class: ta_right"] [/TD]
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[TD="class: filtrer_th ta_left"]Affected population[/TD]
[TD]Wild bird surveillance.[/TD]
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[TD] [TABLE="class: TableFoyers, width: 917"]
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[TD="class: filtrer_th ta_left, align: left"]Summary of outbreaks[/TD]
[TD="class: filtrer_th ta_left"]Total outbreaks: 1[/TD]
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[TD="class: filtrer_th ta_left"]Total animals affected[/TD]
[TD] [TABLE="class: TableFoyers, width: 771"]
[TR]
[TD="class: filtrer_th ta_center last"]Species[/TD]
[TD="class: filtrer_th ta_center last"]Susceptible[/TD]
[TD="class: filtrer_th ta_center last"]Cases[/TD]
[TD="class: filtrer_th ta_center last"]Deaths[/TD]
[TD="class: filtrer_th ta_center last"]Destroyed[/TD]
[TD="class: filtrer_th ta_center last"]Slaughtered[/TD]
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[TD]American wigeon:Anas americana(Anatidae)[/TD]
[TD="class: ta_right"] [/TD]
[TD="class: ta_right"]**[/TD]
[TD="class: ta_right"] [/TD]
[TD="class: ta_right"] [/TD]
[TD="class: ta_right"] [/TD]
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[TD="class: filtrer_th ta_left"]Outbreak statistics[/TD]
[TD] [TABLE="class: TableFoyers, width: 771"]
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[TD="class: filtrer_th ta_center last"]Species[/TD]
[TD="class: filtrer_th ta_center last"]Apparent morbidity rate[/TD]
[TD="class: filtrer_th ta_center last"]Apparent mortality rate[/TD]
[TD="class: filtrer_th ta_center last"]Apparent case fatality rate[/TD]
[TD="class: filtrer_th ta_center last"]Proportion susceptible animals lost*[/TD]
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[TD]American wigeon:Anas americana(Anatidae)[/TD]
[TD="class: ta_right"]**[/TD]
[TD="class: ta_right"]**[/TD]
[TD="class: ta_right"]**[/TD]
[TD="class: ta_right"]**[/TD]
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[TD="class: filtrer_th ta_left, colspan: 2"]*Removed from the susceptible population through death, destruction and/or slaughter[/TD]
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[TD="class: filtrer_th ta_left, colspan: 2"]**Not calculated because of missing information[/TD]
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[TD]Epidemiology [TABLE="class: TableFoyers, width: 917"]
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[TD="class: filtrer_th ta_left"]Source of the outbreak(s) or origin of infection[/TD]
[TD]
  • Contact with wild species
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[TD="class: filtrer_th ta_left"]Epidemiological comments[/TD]
[TD]As part of the increased AI surveillance of wild birds (performed by testing hunter harvested birds), another Eurasian H5 clade 2.3.4.4 virus was identified through whole genome sequencing of the virus isolate. Introduction of the Eurasian (EA) H5N8 virus into the Pacific Flyway sometime during late 2014 has allowed mixing with North American (AM) lineage viruses and generated new combinations with genes from both EA and AM origin (or “reassortant” viruses) such as the EA/AM H5N2-reassortant detected in Canada and the United States. Such findings are not unexpected as the EA-H5N8 virus continues to circulate. A novel EA/AM H5N1-reassortant clade 2.3.4.4 was isolated from an American green winged teal in Whatcom County, Washington. This H5N1 subtype is different from strain circulating in Asia. The gene constellation is as follows: Eurasian lineage genes (PB2, H5, NP, MP >99% identical to A/gyrfalcon/WA/41088/2014 H5N8); North American lineage genes (PB1 {98% identical to A/Northern pintail/Washington/40964/2014 H5N2}, PA, N1, NS of North American LPAI wild bird lineage. The HA cleavage site is compatible with strains that are highly pathogenic. As of 15 April 2015 there was one new occurrence in wild birds of novel EA/AM H5N1. This novel HPAI EA/AM H5N1-reassortant virus has NOT been found in commercial poultry anywhere in the United States.[/TD]
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[TD]Control measures [TABLE="class: TableFoyers, width: 917"]
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[TD="class: filtrer_th ta_left"]Measures applied[/TD]
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  • Vaccination prohibited
  • No treatment of affected animals
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[TD="class: filtrer_th ta_left"]Measures to be applied[/TD]
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  • No other measures
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[TD]Diagnostic test results [TABLE="class: TableFoyers, width: 917"]
[TR]
[TD="class: filtrer_th ta_left"]Laboratory name and type[/TD]
[TD="class: filtrer_th ta_left"]Species[/TD]
[TD="class: filtrer_th ta_left"]Test[/TD]
[TD="class: filtrer_th ta_left"]Test date[/TD]
[TD="class: filtrer_th ta_left last"]Result[/TD]
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[TD="class: filtrer"]National Veterinary Services Laboratories (NVSL) (National laboratory)[/TD]
[TD="class: filtrer"]American wigeon[/TD]
[TD="class: filtrer"]real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)[/TD]
[TD="class: filtrer"]05/03/2015[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
[/TR]
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[TD="class: filtrer"]National Veterinary Services Laboratories (NVSL) (National laboratory)[/TD]
[TD="class: filtrer"]American wigeon[/TD]
[TD="class: filtrer"]virus sequencing[/TD]
[TD="class: filtrer"]05/03/2015[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
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[TD]Future Reporting [TABLE="class: TableFoyers, width: 917"]
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[TD="class: filtrer"]The event is continuing. Weekly follow-up reports will be submitted.[/TD]
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.../
http://www.oie.int/wahis_2/public/w...?page_refer=MapFullEventReport&reportid=17530
 
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