OIE: Highly pathogenic avian influenza, Japan

OIE: Highly pathogenic avian influenza, Japan
submited by kickingbird at Nov, 30, 2016 9:27 AM from OIE

Information received on 29/11/2016 from Dr Kazuo Ito, Director, International Animal Health Affairs Office, Animal Health Division, Food Safety and Consumer Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries, Tokyo, Japan

Summary

Report type	Immediate notification
Date of start of the event	28/11/2016
Date of confirmation of the event	28/11/2016
Report date	29/11/2016
Date submitted to OIE	29/11/2016
Reason for notification	Reoccurrence of a listed disease
Date of previous occurrence	17/02/2015
Manifestation of disease	Clinical disease
Causal agent	Highly pathogenic avian influenza virus
Serotype	H5
Nature of diagnosis	Clinical, Laboratory (basic)
This event pertains to	the whole country

New outbreaks

Summary of outbreaks

Total outbreaks: 2

Outbreak Location

AOMORI ( Aomori-shi )
NIIGATA ( Sekikawa-mura )

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Birds	332090	140	140		0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	0.04%	0.04%	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

Outbreak 1 (Aomori):
On 28 November 2016, the local veterinary service in Aomori Prefecture received a notification from a domestic duck farm on an increase in the number of dead birds (10 birds on the same day). The samples were sent to the laboratory of local veterinary service (Aomori Livestock Hygiene Service Centre) and the samples from dead birds were confirmed to be influenza A virus positive by antigen-capture kits. On the same day, the Centre started RT-PCR and RRT-PCR tests and confirmed that the subtype was H5.

Outbreak 2 (Niigata):
On 28 November 2016, the local veterinary service in Niigata Prefecture received a notification from a domestic hen farm on an increase in the number of dead birds (60 birds on the same day). The samples were sent to the laboratory of local veterinary service (Niigata Livestock Hygiene Service Centre) and the samples from dead birds were confirmed to be influenza A virus positive by antigen-capture kits. On the same day, the Centre started RT-PCR and RRT-PCR tests and confirmed that the subtype was H5.

For both outbreaks:
Stamping-out policy was applied to the affected farms. Destruction of all the susceptible birds in the affected farms is being implemented.
Movement restrictions are imposed on the farms within a radius of 3km of the affected farms.
Shipment restrictions are imposed on the farms within a radius of 3-10km of the affected farms.
The N-type has not yet been identified.

Control measures

Measures applied	Movement control inside the country Screening Disinfection / Disinfestation Quarantine Stamping out Vaccination prohibited No treatment of affected animals
Measures to be applied	No other measures

Diagnostic test results

Laboratory name and type

Aomori Livestock Hygiene Service Centre ( Local laboratory )

Tests and results

Species

Test

Test date

Result

Birds

real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)

28/11/2016

Positive

Birds

reverse transcription - polymerase chain reaction (RT-PCR)

28/11/2016