OIE: Low pathogenic avian influenza (poultry) ,United States of America
Information received on 17/03/2015 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 |
09/03/2015 |
|
Date of pre-confirmation of the event |
10/03/2015 |
|
Report date |
17/03/2015 |
|
Date submitted to OIE |
17/03/2015 |
|
Reason for notification |
Reoccurrence of a listed disease |
|
Date of previous occurrence |
17/09/2014 |
|
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 |
|
Outbreak Location |
- CALIFORNIA ( Merced County, Merced )
|
|
Total animals affected |
|
Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
|
Birds |
61000 |
** |
|
|
| |
|
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 17 March 2015:
? A commercial tom turkey flock exhibited coughing with a slight increase in mortality. Samples were submitted for laboratory testing and were confirmed positive for influenza A virus (IAV) H7N3 LPAI.
? North American H7N3 LPAI based upon partial HA and NA sequence obtained directly from swab specimen; virus isolation pending.
? The infected premises was placed under quarantine following preliminary findings and an epidemiological investigation was initiated.
? Follow-up surveillance and testing on 10 epidemiologically associated farms was negative for IAV.
The epidemiological investigation and response to the event are continuing. |
Control measures
|
Measures applied |
- Quarantine
- Movement control inside the country
- Zoning
- 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) |
10/03/2015 |
Positive |
|
Birds |
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) |
16/03/2015 |
Negative | |
|
|