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

Information received on 22/10/2018 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

19/10/2018

Date of confirmation of the event

20/10/2018

Report date

22/10/2018

Date submitted to OIE

22/10/2018

Reason for notification

Recurrence of a listed disease

Date of previous occurrence

2018

Manifestation of disease

Sub-clinical infection

Causal agent

Low pathogenic avian influenza virus

Serotype

H5N2

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

  • Minnesota ( Kandiyohi County, Kandiyohi )

Total animals affected

Species

Susceptible

Cases

Deaths

Killed and disposed of

Slaughtered

Birds

40000

**

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

Following the 2015 highly pathogenic avian influenza (HPAI) outbreak that occurred in central Minnesota, increased surveillance has been implemented during the spring and fall months. This routine surveillance detected a low pathogenic avian influenza (LPAI) H5N2 in a
commercial meat-type turkey flock. The flock was healthy and not showing any clinical signs of AI. Partial HA/NA sequencing determined the H5 and N2 to be a low pathogenic virus of North American wild bird lineage. Further characterization is pending virus recovery.

The Minnesota Board of Animal Health (BAH) and USDA, Animal and Plant Health Inspection Services (APHIS) are conducting an epidemiological investigation of the event and have increased surveillance in the area as a result of this detection. State officials have quarantined the
affected premises and implemented movement controls. Turkeys from this premises will be depopulated through controlled marketing.

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 permitted (if a vaccine exists)
  • No treatment of affected animals

Measures to be applied

  • Disinfection

Diagnostic test results

Laboratory name and type

Minnesota Poultry Testing Laboratory ( Local laboratory )

Tests and results

Species

Test

Test date

Result

Birds

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

19/10/2018