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2024-3-29 8:10:32


OIE: Low pathogenic avian influenza (poultry) ,United States of America
submited by kickingbird at Apr, 24, 2014 0:8 AM from OIE

Information received on 22/04/2014 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

Date of start of the event

14/04/2014

Date of pre-confirmation of the event

18/04/2014

Report date

22/04/2014

Date submitted to OIE

22/04/2014

Reason for notification

Reoccurrence of a listed disease

Date of previous occurrence

06/08/2013

Manifestation of disease

Clinical disease

Causal agent

Low pathogenic avian influenza virus

Serotype

H5

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

Destroyed

Slaughtered

Birds

116000

**

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

The USDA Animal Plant Health Inspection Service (APHIS) and the California Department of Food and Agriculture (CDFA) are conducting a comprehensive epidemiological investigation of this event.

Epidemiological summary of the event as of 22 April 2014:
- A commercial Japanese quail (Coturnix japonica) layer flock was experiencing increased mortality in the adult laying population. Samples were submitted for laboratory testing and were confirmed positive for influenza A virus (IAV) subtype H5.
o The amino acid sequence at the hemagglutinin protein cleavage site of the laboratory specimen is compatible with North American low pathogenic avian influenza virus. The sequence is 99.1% similar to A/American green-winged teal/Wisconsin 10OS3127/2010.
- The index premises and two epidemiologically linked premises were placed under quarantine.
o Laboratory testing for influenza A virus (IAV) on the two epidemiologically linked premises was negative for IAV.
- Depopulation of adult quail on affected premises began.
The epidemiological investigation and response to the event are continuing.

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 (2013).

Control measures

Measures applied

  • Stamping out
  • Quarantine
  • Vaccination prohibited
  • No treatment of affected animals

Measures to be applied

  • No other measures

Diagnostic test results

Laboratory name and type

California Animal Health and Food Safety (CAHFS) Laboratory ( Local laboratory )

Tests and results

Species

Test

Test date

Result

Birds

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

18/04/2014

Positive

Birds

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

19/04/2014

Negative

Laboratory name and type

National Veterinary Services Laboratories (NVSL) ( National laboratory )

Tests and results

Species

Test

Test date

Result

Birds

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

19/04/2014

Positive

Birds

virus isolation

Pending

Future Reporting

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

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