OIE: Pandemic influenza H1N1 (2009), Japan

OIE: Pandemic influenza H1N1 (2009), Japan
submited by kickingbird at Jan, 21, 2010 10:1 AM from OIE

Information received on 20/01/2010 from Dr Toshiro Kawashima, CVO, Animal Health Division, Ministry of Agriculture, Forestry and Fisheries, Tokyo , Japan

Summary

Report type	Immediate notification
Start date	12/01/2010
Date of first confirmation of the event	12/01/2010
Report date	20/01/2010
Date submitted to OIE	20/01/2010
Reason for notification	Emerging disease
Morbidity	6.7 %
Mortality	0 %
Zoonotic impact	It affects also humans
Causal agent	Pandemic influenza H1N1 (2009)

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Location(s)

YAMAGATA (Shonai area)

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Swine	2445	164	0	0	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Swine	6.71%	0.00%	0.00%	0.00%

* Removed from the susceptible population through death, destruction and/or slaughter

Epidemiology

Source of the outbreak(s) or origin of infection

Unknown or inconclusive

Epidemiological comments

A worker found the animals, which showed poor appetite, fever and cough in the farm occasionally, and reported them to the Livestock Hygiene Service Centre in Yamagata prefecture on 12 January 2010.
Ten animals which showed clinical signs were sampled.
5 of 10 samples were found to be influenza A positive by rapid test on 12 January 2010 and 7 of 10 samples were influenza A positive by PCR on 13 January 2010.
There were some workers who had been infected with influenza A virus before the outbreak.
On 20 January 2010, the virus strains detected from 4 samples were confirmed as pandemic influenza H1N1 2009 by the National Institute of Animal Health (NIAH).
The affected farm is being under voluntary movement restraint.
Epidemiological investigation is continuing.

Control measures

Measures applied	Movement control inside the country No vaccination No treatment of affected animals
Measures to be applied	Screening

Diagnostic test results

Laboratory name and type

Livestock Hygiene Service Centre, Yamagata prefecture (Local laboratory)

Tests and results

Species	Test	Test date	Result
Swine	pathogen isolation on cell culture	17/01/2010	Positive
Swine	polymerase chain reaction (PCR)	13/01/2010	Positive
Swine	rapid tests	12/01/2010	Positive

Laboratory name and type

National Institute of Animal Health (National laboratory)

Tests and results

Species	Test	Test date	Result
Swine	gene sequencing	20/01/2010	Positive

Future Reporting

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

See Also:

http://www.oie.int

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