OIE: Low pathogenic avian influenza (poultry)(H7N1), United States of America

OIE: Low pathogenic avian influenza (poultry)(H7N1), United States of America
submited by kickingbird at Mar, 13, 2018 13:25 PM from OIE

Information received on 09/03/2018 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	06/03/2018
Date of confirmation of the event	08/03/2018
Report date	09/03/2018
Date submitted to OIE	09/03/2018
Reason for notification	Recurrence of a listed disease
Date of previous occurrence	2017
Manifestation of disease	Clinical disease
Causal agent	Low pathogenic avian influenza virus
Serotype	H7N1
Nature of diagnosis	Laboratory (basic), Laboratory (advanced)
This event pertains to	a defined zone within the country

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

TEXAS ( Hopkins county, Hopkins )

Total animals affected

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Birds	24091	**

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 routine, pre-slaughter testing and surveillance for H5/H7 avian influenza, H7N1 low pathogenic avian influenza (LPAI) was detected in a commercial broiler breeder flock based upon H7 PCR and antibody to H7 and N1. Partial HA sequencing determined the H7 to be a low pathogenic virus of North American wild bird lineage. Further characterization is pending virus recovery. The flock exhibited a slight increase in mortality and a decrease in egg production. Depopulation of the premises is underway.
The USDA Animal Plant Health Inspection Service (APHIS) and the Texas Animal Health Commission are conducting a comprehensive epidemiological investigation of this incident and have implemented enhanced surveillance and testing within 10km of this finding.

Control measures

Measures applied	Movement control inside the country Surveillance outside containment and/or protection zone Surveillance within containment and/or protection zone Quarantine Zoning Vaccination prohibited No treatment of affected animals
Measures to be applied	Disinfection

Diagnostic test results

Laboratory name and type

Texas A&M Veterinary Medical Diagnostic Laboratory ( Local laboratory )

Tests and results

Species	Test	Test date	Result
Birds	enzyme-linked immunosorbent assay (ELISA)	07/03/2018	Positive

Laboratory name and type

Texas A&M Veterinary Medical Diagnostic Laboratory ( Local laboratory )

Tests and results

Species

Test

Test date

Result

Birds

real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)

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See Also:

http://www.oie.int

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