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

Information received on 30/03/2011 from Dr John Clifford, Deputy Administrator, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America

Summary

Report type Immediate notification
Start date 25/03/2011
Date of first confirmation of the event 25/03/2011
Report date 29/03/2011
Date submitted to OIE 30/03/2011
Reason for notification Reoccurrence of a listed disease
Date of previous occurrence 15/12/2009
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
Location(s)
  • MISSOURI (Polk County, Missouri, Polk County)
Total animals affected
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 30000 **
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 -Samples were collected as part of routine, pre-slaughter surveillance for the National Poultry Improvement Plan (NPIP) Avian Influenza Clean Program (H5 and H7).
-The turkeys did not show any clinical signs of sickness or disease.
-The Missouri H5/H7 LPAI Initial State Response and Containment plan has been implemented.

Note by the OIE Animal Health Information Department: H5 and H7 avian influenza in its low pathogenic form in poultry is a notifiable disease as per Chapter 10.4. on avian influenza of the Terrestrial Animal Health Code (2010).

Control measures

Measures applied
  • Quarantine
  • Movement control inside the country
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • No other measures

Diagnostic test results

Laboratory name and type Missouri Department of Agriculture (Local laboratory)
Tests and results
Species Test Test date Result
Birds agar-gel immunodiffusion (AGID) 25/03/2011 Positive
Laboratory name and type National Veterinary Services Laboratories (National laboratory)
Tests and results
Species Test Test date Result
Birds agar-gel immunodiffusion (AGID) 28/03/2011 Positive
Birds neuraminidase inhibition assay 28/03/2011 Positive
Birds real-time PCR 28/03/2011 Positive
Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 28/03/2011 Positive
Birds virus isolation Pending

Future Reporting

The event is continuing. Weekly follow-up reports will be submitted.