Rhiza Labs FluTracker Forum

The place to discuss the flu
It is currently Fri Oct 20, 2017 1:03 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 12 posts ]  Go to page Previous  1, 2
Author Message
PostPosted: Wed Jan 21, 2015 11:29 pm 
Offline

Joined: Wed Aug 19, 2009 10:42 am
Posts: 56044
Location: Pittsburgh, PA USA
SDA confirms high-path H5N1 in Washington state

Jim Wappes | Editorial Director | CIDRAP News | Jan 21, 2015

Image
Green-winged teal
Winston Wong/ Flickr cc
Increased wild bird surveillance turned up the new virus in the hunter-killed duck.
In an apparent first, highly pathogenic avian influenza (HPAI) H5N1 has been detected in a US bird, in Washington state, according to a report filed by John Clifford, DVM, deputy administrator with the Animal and Plant Health Inspection Service of the US Department of Agriculture (USDA).

The report, posted yesterday by the World Organization for Animal Health (OIE), details a novel H5N1 virus found in a wild green-winged teal in Whatcom County that resulted from reassortment between a Eurasian (EA)-type H5N8 virus and North American avian influenza strains.

The virus was detected in a hunter-killed bird as part of increased avian flu surveillance in wild birds, according to the report. Whole-genome sequencing placed it in EA H5 clade 2.3.4.4.

Its PB2, H5, NP, and MP components are more than 99% identical to the HPAI H5N8 strain found in a wild gyrfalcon in the same county in December. It also contains PB1 genes that are 98% identical to those in a HPAI H5N2 found in a northern pintail duck, also in Whatcom County in December, as well as PA, N1, and NS components from a North American low-pathogenic wild bird lineage.

"Such findings are not unexpected as the EA-H5N8 virus continues to circulate," the report states. It concludes that the new H5N1 reassortant virus "has NOT been found in commercial poultry anywhere in the United States."

Information on the USDA Web site says that HPAI H5N1 has not been previously detected in the United States, but the OIE report lists 2004 as the date of a previous occurrence of the disease. That might, however, refer to the detection of HPAI H5N2 in Texas that year, or to a low-path avian flu outbreak. A phone call to Clifford's office could not immediately clarify the details.

H5N2, H5N8 in Idaho
In related news, the Idaho State Department of Agriculture (ISDA) said in a news release yesterday that HPAI H5N2 has been detected in a backyard poultry flock in that state, as well as in domestic falcons. In addition, HPAI H5N8 has been detected in wild birds in the state, the agency said.

The outbreak in the backyard flock was first reported by the media on Jan 19. The detections of both strains were the result of increased surveillance, the ISDA said.

The three affected falcons and the unspecified number of poultry are both in Canyon County in southwestern Idaho, and the H5N8-positive ducks were sampled in Gooding County south central Idaho.

"Both the H5N8 and H5N2 strains of HPAI confirmed in Idaho have previously been identified in incidents in backyard domestic poultry and wild fowl in other northwestern states. It is critical that backyard flock owners and poultry producers take every opportunity to prevent contact between domestic birds and the wild waterfowl that carry the avian influenza virus," Bill Barton, DVM, ISDA state veterinarian, said in the release.

See also:

Jan 20 OIE report

Jan 20 IDSA news release

Jan 20 USDA update on recent H5N2 and H5N8 detections

CIDRAP overview on avian flu in birds

http://www.cidrap.umn.edu/news-perspect ... gton-state

_________________
www.twitter.com/hniman


Top
 Profile  
 
PostPosted: Fri Jan 23, 2015 12:58 pm 
Offline

Joined: Wed Aug 19, 2009 10:42 am
Posts: 56044
Location: Pittsburgh, PA USA
Highly pathogenic avian influenza,
United States of America

Information received on 22/01/2015 from Dr John Clifford, Deputy Administrator, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America
Summary
Report type Follow-up report No. 4
Date of start of the event 10/12/2014
Date of pre-confirmation of the event 14/12/2014
Report date 22/01/2015
Date submitted to OIE 22/01/2015
Reason for notification Reoccurrence of a listed disease
Date of previous occurrence 2004
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza
Serotype H5N8
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (16/12/2014)
Follow-up report No. 1 (19/12/2014)
Follow-up report No. 2 (29/12/2014)
Follow-up report No. 3 (07/01/2015)
Follow-up report No. 4 (22/01/2015)
New outbreaks (4)
Outbreak 1 Butte County, Butte, CALIFORNIA
Date of start of the outbreak 02/01/2015
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Gadwall:Anas strepera(Anatidae)
Affected population Hunter harvested wild gadwall duck
Outbreak 2 Yolo county, Yolo, CALIFORNIA
Date of start of the outbreak 09/01/2015
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Green-winged Teal:Anas carolinensis(Anatidae)
Affected population Hunter harvested wild American green-winged teal duck.
Outbreak 3 Davis County, Davis, UTAH
Date of start of the outbreak 09/01/2015
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
American wigeon:Anas americana(Anatidae)
Affected population Hunter harvested wild American wigeon duck.
Outbreak 4 Gooding County, Gooding, IDAHO
Date of start of the outbreak 16/01/2015
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Mallard:Anas platyrhynchos(Anatidae)
Affected population Hunter harvested wild mallard duck
Summary of outbreaks Total outbreaks: 4
Total animals affected
Species Susceptible Cases Deaths Destroyed Slaughtered
Gadwall:Anas strepera(Anatidae) **
Green-winged Teal:Anas carolinensis(Anatidae) **
American wigeon:Anas americana(Anatidae) **
Mallard:Anas platyrhynchos(Anatidae) **
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Gadwall:Anas strepera(Anatidae) ** ** ** **
Green-winged Teal:Anas carolinensis(Anatidae) ** ** ** **
American wigeon:Anas americana(Anatidae) ** ** ** **
Mallard:Anas platyrhynchos(Anatidae) ** ** ** **
*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 wild bird related event. 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 Canada and the US. These findings are not unexpected as the EA-H5N8 virus continues to circulate. The EA H5 clade 2.3.4.4 viruses are highly pathogenic for poultry. As part of the increased AI surveillance of wild birds (performed by testing hunter harvested birds), H5N8 with an amino acid sequence at the HA cleavage site that is consistent with highly pathogenic avian influenza has been identified in wild ducks in the Pacific flyway. HA and NA sequence fragments from these viruses, and the virus from the backyard finding, are essentially identical to that found in the reported gyrfalcon. Update on the Oregon backyard premises as of 17 January 2015: • A 10 km active surveillance zone was initiated for avian influenza. o All surveillance and testing has been negative for AI. The HPAI EA-H5N8 virus has NOT been found in commercial poultry anywhere in the United States.
Control measures
Measures applied
Stamping out
Quarantine
Movement control inside the country
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) American wigeon real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 09/01/2015 Positive
National Veterinary Services Laboratories (NVSL) (National laboratory) Gadwall real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 02/01/2015 Positive
National Veterinary Services Laboratories (NVSL) (National laboratory) Gadwall virus sequencing 02/01/2015 Positive
National Veterinary Services Laboratories (NVSL) (National laboratory) Green-winged Teal real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 09/01/2015 Positive
National Veterinary Services Laboratories (NVSL) (National laboratory) Green-winged Teal virus sequencing 09/01/2015 Positive
National Veterinary Services Laboratories (NVSL) (National laboratory) Mallard real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 16/01/2015 Positive
National Veterinary Services Laboratories (NVSL) (National laboratory) Mallard virus sequencing 16/01/2015 Positive
NationalVeterinary Services Laboratories (NVSL) (National laboratory) American wigeon virus sequencing 09/01/2015 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.

http://www.oie.int/wahis_2/public/wahid ... rtid=17031

_________________
www.twitter.com/hniman


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 12 posts ]  Go to page Previous  1, 2

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: Majestic-12 [Bot] and 60 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group