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Animal Disease Outbreak – Highly Pathogenic H7 Avian Influenza (Commercial Poultry): Tennessee


Published Date: 2017-03-05 22:44:14
Subject: PRO/AH/EDR> Avian influenza (66): USA (TN) poultry, HPAI, H7
Archive Number: 20170305.4881365

Date: Sun 5 Mar 2017
Source: APHIS USDA [edited]

USDA Confirms Highly Pathogenic H7 Avian Influenza in a Commercial Flock in Lincoln County, Tennessee.
Donna Karlsons <>
Lyndsay Cole <>

The United States Department of Agriculture’s (USDA) Animal and Plant Health Inspection Service (APHIS) has confirmed the presence of highly pathogenic H7 avian influenza (HPAI) of North American wild bird lineage in a commercial chicken breeder flock in Lincoln County, Tennessee. This is the first confirmed case of HPAI in commercial poultry in the United States this year. The flock of 73 500 is located within the Mississippi flyway. Samples from the affected flock, which experienced increased mortality, were tested at Tennessee’s Kord Animal Health Diagnostic Laboratory and confirmed at the APHIS National Veterinary Services Laboratories (NVSL) in Ames, Iowa. Virus isolation is ongoing, and NVSL expects to characterize the neuraminidase protein, or “N-type”, of the virus within 48 hours.

APHIS is working closely with the Tennessee Department of Agriculture on a joint incident response. State officials quarantined the affected premises and birds on the property will be depopulated to prevent the spread of the disease. Birds from the flock will not enter the food system.

The Tennessee Department of Agriculture is working directly with poultry workers at the affected facility to ensure that they are taking the proper precautions to prevent illness and contain disease spread. As a reminder, the proper handling and cooking of poultry and eggs to an internal temperature of 165 ˚F kills bacteria and viruses.

As part of existing avian influenza response plans, Federal and State partners are working jointly on additional surveillance and testing in the nearby area. The United States has the strongest AI surveillance program in the world, and USDA is working with its partners to actively look for the disease in commercial poultry operations, live bird markets and in migratory wild bird populations.

USDA will be informing the World Organization for Animal Health (OIE) as well as international trading partners of this finding. USDA also continues to communicate with trading partners to encourage adherence to OIE standards and minimize trade impacts. OIE trade guidelines call on countries to base trade restrictions on sound science and, whenever possible, limit restrictions to those animals and animal products within a defined region that pose a risk of spreading disease of concern.

These virus strains can travel in wild birds without them appearing sick. People should avoid contact with sick/dead poultry or wildlife. If contact occurs, wash your hands with soap and water and change clothing before having any contact with healthy domestic poultry and birds.

All bird owners, whether commercial producers or backyard enthusiasts, should continue to practice good biosecurity, prevent contact between their birds and wild birds, and report sick birds or unusual bird deaths to State/Federal officials, either through their state veterinarian or through USDA’s toll-free number at 1-866-536-7593. Additional information on biosecurity for can be found at <>.

Additional background
Avian influenza (AI) is caused by an influenza type A virus which can infect poultry (such as chickens, turkeys, pheasants, quail, domestic ducks, geese and guinea fowl) and is carried by free flying waterfowl such as ducks, geese and shorebirds. AI viruses are classified by a combination of two groups of proteins: hemagglutinin or “H” proteins, of which there are 16 (H1-H16), and neuraminidase or “N” proteins, of which there are 9 (N1-N9). Many different combinations of “H” and “N” proteins are possible. Each combination is considered a different subtype, and can be further broken down into different strains. AI viruses are further classified by their pathogenicity (low or high)– the ability of a particular virus strain to produce disease in domestic chickens.

Communicated by:
David D. Caveny,
Emeritis, Poultry Science Assn USA

[State and local officials have been closely watching birds for any sign of illness or disease for several months now. This vigilance is likely to have paid off well, as this was probably caught early.

Biosecurity on production facilities is critical. This may include washing tires of trucks that bring feed, foot baths for all who work on the premises or who come to visit.

Private owners, back yard enthusiasts, and avian athlete owners should all practice tight biosecurity. If you are showing a bird or group of birds check with the show on what the biosecurity requirements are.

The avian Influenza season seems to have arrived. – Mod.TG

A HealthMap/ProMED-mail map can be accessed at:]

See Also

Avian influenza (07): USA (MT) wild duck, HPAI H5N2 20170111.4756352

Avian influenza (72): USA (AK) wild duck, HPAI H5N2, OIE 20160830.4449554
Avian influenza (67): USA, poultry H5, 2014-2015, 20160727.4371801
Avian influenza (11): USA (IN) poultry, HPAI/LPAI H7N8 20160120.3950429
Avian influenza (10): USA (IN) poultry, HPAI H7N8, OIE 20160119.3946046
Avian influenza (08): USA (IN) poultry, HPAI revised to LPAI H7N8, update 20160118.3944747
Avian influenza (07): USA (IN) poultry, HPAI H7N8 20160117.3943565


Avian influenza (164): USA (GA) HPAI H5N2, poultry, proactive prevention 20150620.3452030
Avian influenza (151): USA (MN,IA) HPAI H5N2, poultry 20150606.3414670
Avian influenza (149): USA: (MN,IA) HPAI H5N2, poultry 20150605.3411831
Avian influenza (141): USA: (MN) HPAI H5N2, poultry 20150531.3397688
Avian influenza (132): USA: (IA,NB) HPAI H5N2, poultry 20150520.3373609
Avian influenza (123): USA (WI) HPAI H5N2 turkey, (IN) HPAI H5N8 1st rep poultry 20150512.3356324
Avian influenza (120): USA, HPAI H5N2, poultry, turkey 20150510.3352747
Avian influenza (99): Canada (ON) HPAI H5N2, turkey 20150429.3329590
Avian influenza (90): Canada (ON), poultry, HPAI H5N2 susp. 20150419.3308319
Avian influenza (80): USA, HPAI H5N2, turkey, poultry 20150415.3298419
Avian influenza (71): Canada (ON) HPAI, H5N2, turkey 20150409.3285805
Avian influenza (63): USA (WY) HPAI H5N2, goose 20150331.3267533
Avian influenza (50): USA (AR) turkey, H5N2 20150313.3227033
Avian influenza (49): USA (MO) turkey, H5N2 20150312.3223765
Avian influenza (39): USA (OR) backyard flock 20150215.3167658
Avian influenza (23): USA (CA), turkey, HPAI H5N8, OIE 20150126.3120342
Avian influenza (22): USA (CA) turkey, H5N8 20150125.3117238
Avian influenza (18): USA (WA) wild duck, HPAI H5N1, OIE 20150122.3109001
Avian influenza (17): USA (WA) wild duck, HPAI H5N1, OIE 20150122.3109001
Avian influenza (16): USA (WA, ID) HPAI H5N2, H5N8 20150121.3107002
Avian influenza (09): USA (UT) H5N8, wild duck 20150115.3094193
Avian influenza (08): USA (CA) HPAI H5N8, wild bird 20150115.3093306
Avian influenza (01): USA (WA) backyard poultry, HPAI H5N2, OIE 20150109.3082193

A ProMED-mail post
ProMED-mail is a program of the International Society for Infectious Diseases

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