OIE: Low pathogenic avian influenza (poultry) ,United States of America
Information received on 19/06/2013 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 |
06/06/2013 |
|
Date of pre-confirmation of the event |
17/06/2013 |
|
Report date |
19/06/2013 |
|
Date submitted to OIE |
29/06/2013 |
|
Reason for notification |
Reoccurrence of a listed disease |
|
Date of previous occurrence |
01/08/2011 |
|
Manifestation of disease |
Clinical disease |
|
Causal agent |
Low pathogenic avian influenza virus |
|
Serotype |
H7N7 |
|
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 |
- ARKANSAS ( Arkansas, Scott County )
|
|
Total animals affected |
|
Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
|
Birds |
9800 |
** |
0 |
9800 |
0 | |
|
Outbreak statistics |
|
Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
|
Birds |
** |
0.00% |
** |
100.00% |
* 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 |
|
|
Epidemiological comments |
The USDA Animal Plant Health Inspection Service (APHIS) and the Arkansas Livestock & Poultry Commission are conducting a comprehensive epidemiological investigation of this event.
Testing of the flock was initiated after birds exhibited a drop in egg production of approximately ten percent. Egg production was returning to normal and the birds appeared healthy at the time of inspection. No increased mortality or respiratory signs were reported.
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 (2012). |
Control measures
|
Measures applied |
- Stamping out
- Quarantine
- Movement control inside the country
- Zoning
- Vaccination prohibited
- No treatment of affected animals
|
|
Measures to be applied |
- Disinfection of infected premises/establishment(s)
|
Diagnostic test results
|
Laboratory name and type |
Arkansas Livestock & Poultry Commission Laboratory ( Local laboratory ) |
|
Tests and results |
|
Species |
Test |
Test date |
Result |
|
Birds |
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) |
17/06/2013 |
Positive | |
|
Laboratory name and type |
National Veterinary Services Laboratories (NVSL) ( National laboratory ) |
|
Tests and results |
|
Species |
Test |
Test date |
Result |
|
Birds |
agar-gel precipitation (AGP) test |
18/06/2013 |
Positive |
|
Birds |
haemagglutination inhibition test (HIT) |
18/06/2013 |
Positive |
|
Birds |
neuraminidase inhibition assay |
18/06/2013 |
Positive |
|
Birds |
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) |
18/06/2013 |
Positive |
|
Birds |
virus isolation |
|
Pending | |
Future Reporting
|
The event is continuing. Weekly follow-up reports will be submitted. |