OIE: Highly pathogenic avian influenza ,Japan

Information received on 13/04/2014 from Dr Toshiro Kawashima, CVO, Animal Health Division, Ministry of Agriculture, Forestry and Fisheries, Tokyo , Japan

Summary

Report type	Immediate notification
Date of start of the event	11/04/2014
Date of pre-confirmation of the event	13/04/2014
Report date	13/04/2014
Date submitted to OIE	13/04/2014
Reason for notification	Reoccurrence of a listed disease
Date of previous occurrence	25/03/2011
Manifestation of disease	Clinical disease
Causal agent	Highly pathogenic avian influenza virus
Serotype	H5
Nature of diagnosis	Clinical, Laboratory (basic), Laboratory (advanced), Necropsy
This event pertains to	the whole country

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

KUMAMOTO ( Kuma-gun, Taragi-machi )

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Birds	56400	200	200	56200	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	0.35%	0.35%	100.00%	100.00%

* 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

Infection with H5 influenza A virus in poultry was confirmed on 13 April 2014 in Kumamoto prefecture. On 12 April 2014, local veterinary officers visited the farm immediately after notification from the owner. Increase of the mortality was recognized and the local veterinary service centre in the prefecture (Kumamoto Livestock Hygiene Centre) confirmed that samples from dead birds were influenza A virus positive by antigen-capture kits. On the same day, the centre started RT-PCR test and confirmed that the subtype was H5 on 13 April. The samples are to be sent to the National Institute of Animal Health for virus isolation and HI test. Movement restrictions are imposed on the farms within the radius of 3km of the affected farm. Shipment restrictions are imposed on the farms within the radius of 3-10km of the affected farm. Stamping-out policy is applied to the affected farm and epidemiologically related farms. Destruction of all the susceptible birds in the affected farm and epidemiologically related farms will be completed on 13 April 2014.

Control measures

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

Diagnostic test results

Laboratory name and type

Kumamoto Livestock Hygiene Centre ( Local laboratory )

Tests and results

Species	Test	Test date	Result
Birds	reverse transcription - polymerase chain reaction (RT-PCR)	13/04/2014	Positive

Future Reporting

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