OIE: Highly pathogenic avian influenza, United States of America

Information received on 06/03/2017 from Dr John Clifford, Official Delegate, Chief Trade Advisor, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America

Summary

Report type	Immediate notification
Date of start of the event	01/03/2017
Date of confirmation of the event	04/03/2017
Report date	06/03/2017
Date submitted to OIE	06/03/2017
Reason for notification	Reoccurrence of a listed disease
Date of previous occurrence	2016
Manifestation of disease	Clinical disease
Causal agent	Highly pathogenic avian influenza virus
Serotype	H7
Nature of diagnosis	Laboratory (advanced)
This event pertains to	a defined zone within the country

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

TENNESSEE ( Lincoln County, Lincoln )

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Birds	73500	**	700	72800	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	**	0.95%	**	100.00%

* 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

Unknown or inconclusive

Epidemiological comments

As part of existing avian influenza response plans, the USDA Animal and Plant Health Inspection Service (APHIS), in conjunction with the Tennessee Department of Agriculture, are responding to the identification of a highly pathogenic avian influenza (HPAI) H7 of North American wild bird lineage detection in a chicken broiler breeder flock. Further virus characterization including N-type is pending. This is the first confirmed case of HPAI in commercial poultry in the United States this year.
A comprehensive epidemiological investigation in the surrounding area has begun along with enhanced surveillance and testing. State officials have quarantined the affected premises and implemented movement controls. Depopulation of birds on the premises has been completed.

Control measures

Measures applied	Movement control inside the country Quarantine Surveillance outside containment and/or protection zone Stamping out Surveillance within containment and/or protection zone Zoning Vaccination prohibited No treatment of affected animals
Measures to be applied	Disinfection / Disinfestation Official disposal of carcasses, by-products and waste

Diagnostic test results

Laboratory name and type

National Veterinary Services Laboratories (NVSL) ( National laboratory )

Tests and results

Species	Test	Test date	Result
Birds	virus isolation		Pending
Birds	virus sequencing	04/03/2017	Positive

Future Reporting

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