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Estados Unidos - 32 nuevos brotes de alta patogenicidad H5N2 de la gripe aviar en aves (OIE, 08 de mayo 2015)
Estados Unidos - 32 nuevos brotes de alta patogenicidad H5N2 de la gripe aviar en aves (OIE, 08 de mayo 2015)
Highly pathogenic avian influenza,
United States of America
Information received on 08/05/2015 from Dr John Clifford, Deputy Administrator, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America
Yellow Medicine County, Yellow Medicine, MINNESOTA
Date of start of the outbreak
29/04/2015
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Not applicable
Affected animals
Species
Susceptible
Cases
Deaths
Destroyed
Slaughtered
Cooper's Hawk:Accipiter cooperii(Accipitridae)
Affected population
Wild bird surveillance.
Outbreak 32 (137)
Sioux County 3, Sioux, IOWA
Date of start of the outbreak
29/04/2015
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Destroyed
Slaughtered
Birds
165174
Affected population
A commercial chicken layer flock.
Summary of outbreaks
Total outbreaks: 32
Total animals affected
Species
Susceptible
Cases
Deaths
Destroyed
Slaughtered
Birds
11076244
**
513700
0
Ring-necked Duck:Aythya collaris(Anatidae)
**
Snow Goose:Anser caerulescens(Anatidae)
**
Cooper's Hawk:Accipiter cooperii(Accipitridae)
**
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Birds
**
**
**
**
Ring-necked Duck:Aythya collaris(Anatidae)
**
**
**
**
Snow Goose:Anser caerulescens(Anatidae)
**
**
**
**
Cooper's Hawk:Accipiter cooperii(Accipitridae)
**
**
**
**
*Removed from the susceptible population through death, destruction and/or slaughter
**Not calculated because of missing information
Epidemiology
Source of the outbreak(s) or origin of infection
Contact with wild species
Epidemiological comments
The USDA Animal and Plant Health Inspection Service (APHIS), in conjunction with State Departments of Agriculture and Wildlife, are continuing to conduct a comprehensive epidemiological investigation and enhanced surveillance (including wild bird surveillance of hunter harvested birds) in response to the HPAI H5N8 and H5N2 wild bird related events. Novel avian influenza virus of Eurasian origin (EA-H5N8 clade 2.3.4.4) spread rapidly along wild bird migratory pathways during 2014. Introduction of this EA-H5N8 virus into the Pacific Flyway sometime during 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 this EA/AM H5N2-reassortant detected in the US. In addition, overlap of the Pacific, Central, and Mississippi Americas flyways has resulted in movement of the virus to the central part of the country. The EA-H5 clade 2.3.4.4 viruses are highly pathogenic for poultry.
Control measures
Measures applied
Stamping out
Quarantine
Movement control inside the country
Zoning
Disinfection of infected premises/establishment(s)
Vaccination prohibited
No treatment of affected animals
Measures to be applied
No other measures
Diagnostic test results
Laboratory name and type
Species
Test
Test date
Result
National Veterinary Services Laboratories (NVSL) (National laboratory)
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