OIE: Highly pathogenic avian influenza(H7N3), United States of America
submited by kickingbird at Apr, 11, 2020 21:20 PM from OIE
| Information received on 09/04/2020 from Dr Mark Davidson, Associate Administrator, USDA-APHIS, United States Department of Agriculture, Washington, United States of America | |
|
Summary
| Report type |
Immediate notification |
| Date of start of the event |
06/04/2020 |
| Date of confirmation of the event |
08/04/2020 |
| Report date |
09/04/2020 |
| Date submitted to OIE |
09/04/2020 |
| Reason for notification |
Recurrence of a listed disease |
| Date of previous occurrence |
11/08/2017 |
| Manifestation of disease |
Clinical disease |
| Causal agent |
High pathogenic avian influenza |
| Serotype |
H7N3 |
| Nature of diagnosis |
Laboratory (advanced) |
| This event pertains to |
a defined zone within the country | |
|
|
| Outbreak 1 |
Chesterfield County, Chesterfield, South Carolina |
| Date of start of the outbreak |
06/04/2020 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Farm |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
34160 |
|
1583 |
32577 |
0 | |
| Affected population |
Commercial meat-type turkey flock | |
| Summary of outbreaks |
Total outbreaks: 1 |
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
34160 |
** |
1583 |
32577 |
0 | |
| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Birds |
** |
4.63% |
** |
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 |
Highly pathogenic avian influenza (HPAI) H7N3 was confirmed on one commercial meat-type turkey premises in Chesterfield County, South Carolina. Clinical signs included respiratory signs, snicking, and increased mortality. State officials have quarantined the affected premises and depopulation of birds has been completed. Movement controls have also been implemented. This is the first confirmed case of HPAI in commercial poultry in the United States this year. The premises has an epidemiological link to another South Carolina premises affected recently by Low pathogenic avian influenza (LPAI) H7N3. The USDA Animal Plant Health Inspection Service (APHIS) and South Carolina State Veterinarian抯 Office, part of Clemson University Livestock Poultry Health (CULPH), continue conducting a comprehensive epidemiological investigation and enhanced surveillance already underway in the area. | |
|
|
Control measures
| Measures applied |
- Movement control inside the country
- Surveillance outside containment and/or protection zone
- Surveillance within containment and/or protection zone
- Quarantine
- Official disposal of carcasses, by-products and waste
- Stamping out
- Zoning
- Vaccination prohibited
- No treatment of affected animals
|
| Measures to be applied |
| |
|
Diagnostic test results
| Laboratory name and type |
Species |
Test |
Test date |
Result |
| National Veterinary Services Laboratories (National laboratory) |
Birds |
gene sequencing |
08/04/2020 |
Positive |
| National Veterinary Services Laboratories (National laboratory) |
Birds |
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) |
08/04/2020 |
Positive | |
|
Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. | |
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