_|U.S.A.: FOLLOW-UP REPORT NO. 2, LOW PATH BIRD FLU VIRUS A/H7N3 IN POULTRY|_

[Giuseppe]

[AVIAN INFLUENZA, POULTRY, A/H7N3, USA, OIE, UPDATES] Low pathogenic avian influenza (poultry), United States of America

Information received on 15/07/2008 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 Follow-up report No. 2 (Final report)
Start date 30/05/2008
Date of first confirmation of the event 07/06/2008
Report date 15/07/2008
Date submitted to OIE 15/07/2008
Date event resolved 14/07/2008
Reason for notification Reoccurrence of a listed disease
Date of previous occurrence 23/07/2007
Causal agent Low pathogenic avian influenza virus Serotype H7N3
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (10/06/2008)
Follow-up report No. 1 (24/06/2008)
Follow-up report No. 2 (15/07/2008)

? Outbreaks
There are no new outbreaks in this report

? Epidemiology
Source of the outbreak(s) or origin of infection Unknown or inconclusive

? Epidemiological comments
The LPAI detection event in Washington County, Arkansas was limited to one premises.
- Backyard poultry were submitted to two rounds of testing with negative results.
- Cleaning and disinfection of affected premises was completed on 21 June 2008.
- Environmental testing of the single affected premises yielded negative results. All quarantines and hold orders have been released.
- All enhanced surveillance activities and epidemiological investigations have been completed.
- All test results from samples obtained from backyard poultry and commercial operations were negative for LPAI.
- All movement restrictions within the 10-km zone have been lifted.
This LPAI H7N3 event is considered closed.

? Control measures
Measures applied Stamping out
Quarantine
Movement control inside the country
Zoning
Disinfection of infected premises/establishment(s)
Vaccination prohibited
No treatment of affected animals
Measures to be applied No other measures

? Future Reporting
The event is resolved. No more reports will be submitted.
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[AlaskaDenise]

Re: _|U.S.A.: FOLLOW-UP REPORT NO. 2, LOW PATH BIRD FLU VIRUS A/H7N3 IN POULTRY|_

Note:

Vaccination prohibited

It would be interesting to compare and contrast the degree of mutation of these occasional LPAI (& other poultry LPAI>HPAI) outbreaks to the degree of mutation with H5N1 over 12 years.

.