OIE: Low pathogenic avian influenza (poultry), United States of America

OIE: Low pathogenic avian influenza (poultry), United States of America
submited by kickingbird at Sep, 14, 2018 17:20 PM from OIE

Information received on 12/09/2018 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	06/09/2018
Date of confirmation of the event	08/09/2018
Report date	12/09/2018
Date submitted to OIE	12/09/2018
Reason for notification	Recurrence of a listed disease
Date of previous occurrence	30/04/2018
Manifestation of disease	Sub-clinical infection
Causal agent	Low pathogenic avian influenza virus
Serotype	H7N3
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

California ( Stanislaus County, Stanislaus )

Total animals affected

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Birds	26258	**		26258	0

Outbreak statistics

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

* 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 the pre-slaughter testing and surveillance program for H5/H7 Avian Influenza, H7N3 low pathogenic avian influenza (LPAI) was detected in a commercial meat-type turkey flock. Partial HA /NA sequencing determined the H7 and N3 to be a low pathogenic virus of North American wild bird lineage. Further characterization is pending virus recovery. The affected flock was depopulated and the carcasses have been rendered.

The USDA Animal Plant Health Inspection Service (APHIS) and the California Department of Food and Agriculture (CDFA) are conducting an epidemiological investigation of the event and have increased testing as a result of the detection. Ten additional commercial poultry premises located within the 10km zone are being tested for influenza virus.

Control measures

Measures applied	Movement control inside the country Surveillance outside containment and/or protection zone Surveillance within containment and/or protection zone Quarantine Stamping out Zoning Vaccination permitted (if a vaccine exists) No treatment of affected animals
Measures to be applied	Disinfection

Diagnostic test results

Laboratory name and type

California Animal Health & Food Safety Laboratory ( Local laboratory )

Tests and results

Species	Test	Test date	Result
Birds	agar-gel precipitation (AGP) test	06/09/2018	Positive

Laboratory name and type

National Veterinary Services Laboratory ( National laboratory )

Tests and results