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Preview: NWHC Avian Influenza News

NWHC Avian Influenza News

The latest news about Avian Influenza.

Published: Thu, 26 Apr 2018 21:00:49 -0500

Copyright: Copyright National Wildlife Health Center

News Update May 30, 2017

Tue, 30 May 2017 00:00:00 -0500

Avian Influenza in Wild AnimalsBulgaria (HPAI H5N8)Highly pathogenic H5N8 avian influenza was detected on a mute swan that died on February 9, 2017 in Plovdiv province, Bulgaria. The highly pathogenic H5N8 virus was not confirmed until May 9 2017.The source of the outbreak is unknown. The virus was first detected in Bulgaria on July 1, 2015 and the outbreak is considered to be resolved as of February 9, 2017. Avian Influenza in PoultryChina (HPAI H7N9)Highly pathogenic H7N9 avian influenza was detected on February 23, 2017 in the Hunan and Guangdong provinces of China. The event is considered ongoing and currently 911 birds have been culled due to the virus. The source of the outbreak is considered unknown. The outbreaks were discovered through active surveillance and controls measures include screening, quarantine, stamping out, disinfection, and vaccination prohibition. Germany (HPAI H5N8)Highly pathogenic H5N8 avian influenza was detected on May 10, 2017 in Schieder-Schwalenberg in the state of North Rhine-Westfalia, Germany. The outbreak resulted in the death of 10 deaths and the culling of 3 chickens in a backyard flock. The source of the outbreak is unknown is considered ongoing. Control measures applied include screening, disinfection, traceability, quarantine, stamping out, surveillance outside containment, official destruction of animal products, official disposal of carcasses, vaccination prohibition, zoning, and no treatment of affected animals. Libya (LPAI H7)Low pathogenic H7 avian influenza was detected on May 16, 2017 in Libya. The virus resulted in the death of one bird and the culling of an additional 19. The source of the outbreak is believed to be contact with wild species as the report noted migratory birds were seen a month ago in the area. Control measures applied include screening, quarantine, stamping out, zoning, disinfection, vaccination prohibition, and no treatment of affected animals. Russia (HPAI H5N8)Highly pathogenic H5N8 avian influenza was detected in the republic of Tartarstan. The outbreak started on May 3, 2017 and has resulted in the death of 5,202 birds with over 447,800 believed to be susceptible to the virus. The source of the outbreak is currently unknown and is considered to be ongoing. Control measures applied include movement control inside the country, screening, quarantine, official disposal of carcasses, and control of wildlife reservoirs, vaccination prohibition, and no treatment of affected animals. Taiwan (HPAI H5)Highly pathogenic H5 avian influenza was reported in Taipei, Taiwan on May 8, 2017. It is reported that five batches of chickens from a wholesale poultry market tested positive for the virus. The chickens originated from farms in Kaohsiung's Mituo District, Miaoli County's Tongxiao Township, Pingtung County's Jhutian Township, and Yunlin County's Yuanchang Township. The government has ordered the culling of 304 chickens after detecting the strain. The public is urged to not purchase poultry that bears no safety certification marks. UK (HPAI H5N8)Highly pathogenic H5N8 avian influenza was reported on a small farm in Lancashire, England. The flock of nine birds have all died or been culled. A 3km protection zone and a 10km surveillance zone have been created in order to limit the risk of the disease spreading from the farm. Public Health England said the risk to public health from the virus is very low and it does not pose a food safety risk. Vietnam (HPAI H5N1)Highly pathogenic H5N1 avian influenza was detected in the Dak Lak province of Vietnam on February 2, 2017. The outbreak is a recurrence of a previous event first reported in October, 2016. The virus resulted in the death of 550 birds and the culling of an additional 3,457. The source of the outbreak is unknown and is considered to be resolved. Control measures applied include vaccination in response to the outbreak, stamping out, disinfection, and no treatment of affected animals. Avian Influenza in HumansChina (H7N9)Highly pathogenic H7N9 avian influenza human infection in 24 individuals has been labo[...]

Highly Pathogenic Avian Influenza Update: National Surveillance and Recent Wild Bird Detections

Mon, 20 Jul 2015 00:00:00 -0500

Since the December 2014 detection of highly pathogenic avian influenza (HPAI) viruses in wild birds and poultryin the United States and Canada, the USGS National Wildlife Health Center (NWHC) has continued to workclosely with the USDA-Animal Plant Health Inspection Service-Wildlife Services, the U.S. Fish and WildlifeService, and state wildlife agencies to implement enhanced mortality investigations and surveillance in wild birds.For background, see NWHC bulletins on Detection of Highly Pathogenic Avian Influenza Viruses H5N2 andH5N8 in Wild Birds of the United States, Detection of Novel Highly Pathogenic Avian Influenza Viruses in WildBirds, and Highly Pathogenic Avian Influenza Virus Found in the Central United States.For an up-to-date summary of positive results from combined federal and state agency HPAI surveillance in wildbirds please view this table: Wild Bird HPAI Cases in the U.S. For positive surveillance results of HPAI inpoultry and captive wild birds in the United States please see the resources provided by the USDA: AvianInfluenza Disease.Recent HPAI Detections in Wild BirdsThe Michigan Department of Natural Resources (MI DNR) recently announced detections of HPAI H5 and H5N2in Canada geese (Branta canadensis) in suburban Detroit, Michigan. HPAI was detected in 12 geese (10juveniles, one yearling, and one adult) that were found sick (clinical signs included head tremors, persistent headtilt to the side or back, and seizures) or dead from late-May through mid-June 2015. Pathological examinationsconducted by the MI DNR and the Michigan State University College of Veterinary Medicines DiagnosticCenter for Population and Animal Health strongly suggested that HPAI was the cause of, or contributed to,sickness and death in these birds. Concurrently, 186 apparently healthy Canada geese from the same area weretested for avian influenza viruses during goose population control activities and no HPAI was identified. Bloodwas collected from these geese to test for evidence of exposure to HPAI and results are pending.The Minnesota Department of Natural Resources recently reported detection of HPAI H5 in a black-cappedchickadee (Poecile atricapilus) in Ramsey County, Minnesota. The bird was displaying signs of neurologicalimpairment and was taken to a wildlife rehabilitation center on June 10, 2015 where it was immediatelyeuthanized. The bird was necropsied at the University of Minnesota and HPAI was confirmed at the USDANational Veterinary Services Laboratories. Additional chickadees displaying signs of neurological impairmenthave also been submitted to this rehabilitation facility and no other birds have tested positive for HPAI at thistime.Field Observations to DateThe recent HPAI detections demonstrate that HPAI is present in resident wild birds during the summer.Transmission of avian influenza viruses, including HPAI, will likely begin to occur more frequently in the latesummer and early autumn due to recruitment of nave young-of-the-year wild waterfowl into populations,decreasing temperatures in the north, and increasing waterfowl densities at staging areas and during earlymigration. Consequently, it is important that wildlife managers continue to be alert for morbidity and mortality inwild birds and immediately report observations to state or federal wildlife health professionals. Continued surveillance for HPAI in wild birds will facilitate early detection, situational awareness, and appropriate responseto these viruses.HPAI in wild birds was initially detected in wild ducks (northern pintail, Anus acuta; mallards, A. platyrhynchos;and American wigeon, A. americana) from a waterfowl mortality event at Wiser Lake, Whatcom County,Washington attributed to aspergillosis that the NWHC investigated in collaboration with the WashingtonDepartment of Fish and Wildlife. It is not clear whether HPAI infection can result in significant disease in wildducks. However, the detection of HPAI in apparently healthy hunter-harvested wild ducks indicates that they canbe actively infected without exhibiting[...]

Minnesota declares H5N2 emergency as spread continues
Minnesota Gov. Mark Dayton today declared an emergency over the widespread H5N2 avian influenza invasion of poultry farms, as the state's first outbreaks in chickens and backyard poultry were reported and Wisconsin and Iowa each announced a new turkey outbreak.By declaring a state of emergency, Dayton activated an emergency operations plan to support the state's response to the crisis, the Minneapolis Star Tribune reported. The state has logged 46 outbreaks in 16 counties, with more than 2.63 million birds either killed by the virus or destroyed to stop its spread, according to the Minnesota Board of Animal Health (MBAH).Dayton's action also calls for National Guard troops to be used as needed, but it wasn't immediately clear whether any would be called up, the story said. On Apr 20, Wisconsin Gov. Scott Walker authorized the Wisconsin National Guard to help respond to H5N2, after the state veterinarian asked that a few Guard members be made available.Large chicken farm hitMinnesota's first H5N2 outbreak on a commercial chicken farm was reported today at J