OIE: 2009 pandemic A/H1N1 influenza virus, United States of America

OIE: 2009 pandemic A/H1N1 influenza virus, United States of America
submited by kickingbird at Dec, 2, 2009 9:22 AM from OIE

Information received on 30/11/2009 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
Start date	16/11/2009
Date of first confirmation of the event	24/11/2009
Report date	30/11/2009
Date submitted to OIE	30/11/2009
Reason for notification	Emerging disease
Morbidity	1 scale05
Mortality	0 scale05
Zoonotic impact	Refer to OIE guidance/opinion
Causal agent	2009 pandemic A/H1N1 influenza virus

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Location(s)

VIRGINIA (State of Virginia)

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Birds	3270	**	0	0	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	**	0.00%	**	0.00%

* 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 Virginia Department of Agriculture and Consumer Services are conducting a comprehensive epidemiological investigation of this event.
Epidemiological sequence of event as of 30 November 2009:
- Week of 16 November 2009: A significant drop in egg production was observed in one barn only.
- 23 November 2009: Presumptive detection of 2009 pandemic A/H1N1 was reported to APHIS and laboratory samples were submitted to the National Veterinary Services Laboratories (NVSL).
- 30 November 2009: NVSL confirmation of 2009 pandemic A/H1N1 influenza virus.
- Information points to recent exposure of the turkeys to a farm worker exhibiting influenza-like symptoms.
- The farm was/and continues to be under enhanced biosecurity.

Control measures

Measures applied	No vaccination No treatment of affected animals
Measures to be applied	No other measures

Diagnostic test results

Laboratory name and type

National Veterinary Services Laboratory (NVSL) (National laboratory)

Tests and results

Species	Test	Test date	Result
Birds	agar-gel immunodiffusion (AGID)	24/11/2009	Positive
Birds	gene sequencing	30/11/2009	Positive
Birds	real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)	24/11/2009	Positive
Birds	virus isolation	30/11/2009	Positive

Future Reporting

The event is continuing. Weekly follow-up reports will be submitted.

See Also:

http://www.oie.int

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