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

OIE: Low pathogenic avian influenza (poultry) ,United States of America
submited by kickingbird at Jun, 25, 2013 14:45 PM from OIE

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

Unknown or inconclusive

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.

See Also:

http://www.oie.int

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