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2017 Highly Pathogenic Avian Influenza

Confirmed HPAI findings:

County, State

Date Confirmed


Lincoln County, Tennessee



Lincoln County, Tennessee



*There have been cases of Low Pathogenic Avian Influenza (LPAI) in Georgia, Wisconsin, Tennessee, Alabama and Kentucky. In Wisconsin, the detection was a North American wild bird linage H5N2 LPAI.  This is NOT the H5N2 Eurasian AI virus from the 2014-2015 Outbreak. The LPAI detected in Georgia, Tennessee, Alabama and Kentucky are also of North American wild bird lineage H7N9.  It is NOT the same as the China H7N9 virus that has impacted poultry and infected humans in Asia. 

Avian influenza is caused by influenza Type A virus (influenza A). Avian-origin influenza viruses are broadly categorized based on a combination of two groups of proteins on the surface of the influenza A virus: 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 related viruses within a subtype may be referred to as a lineage. Avian influenza viruses are classified as either “low pathogenic” or “highly pathogenic” based on their genetic features and the severity of the disease they cause in poultry. Most viruses are of low pathogenicity, meaning that they causes no signs or only minor clinical signs of infection in poultry.

Environmental Assessment (EA):

Notice of Availability: High Pathogenicity Avian Influenza Eradication - Tennessee Final Environmental Assessment, March 2017

We request that all comments on the EA be submitted by Thursday, May 18, 2017. Please submit comments to the following site –


Epidemiologic and Other Analyses of HPAI/LPAI Affected Poultry Flocks- Technical edit update on June 26, 2017

USDA Confirms Highly Pathogenic H7 Avian Influenza in a Commercial Flock in Lincoln County, Tennessee

USDA Issues Update on Highly Pathogenic Avian Influenza in Tennessee

USDA Confirms Second Case of Highly Pathogenic Avian Influenza in a Commercial Flock in Lincoln County, Tennessee

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