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