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2018-11-16 22:59:56


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

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