Re: Japan - H5N8 detected in wild bird droppings
OIE
Highly pathogenic avian influenza, Japan
Information received on 16/12/2014 from Dr Toshiro Kawashima, CVO, Animal Health Division, Ministry of Agriculture, Forestry and Fisheries, Tokyo , Japan
Summary
Report type - Follow-up report No. 4
Date of start of the event - 03/11/2014
Date of pre-confirmation of the event - 13/11/2014
Report date - 16/12/2014
Date submitted to OIE - 16/12/2014
Reason for notification - Reoccurrence of a listed disease
Date of previous occurrence - 16/04/2014
Manifestation of disease - Clinical disease
Causal agent - Highly pathogenic avian influenza virus
Serotype H5N8
Nature of diagnosis - Clinical, Laboratory (advanced)
This event pertains to - the whole country
Summary of outbreaks
Total outbreaks: 4
Total animals affected
Species/ Susceptible/ Cases/ Deaths/ Destroyed /Slaughtered
White-naped crane:Grus vipio(Gruidae)/ 1 /1 /0/ 0
Gruidae (unidentified):Gruidae (incognita)(Gruidae)/ */* / 0/ 0
Hooded crane:Grus monacha(Gruidae)/ 1/ 1/ 0/ 0
Birds /4031/ 31/ 31/ 4000/ 0
Epidemiological comments
Outbreaks in wild birds
Case 1: A weakened Grus vipio (white-naped crane) was collected on 23 November 2014 and tested at Kagoshima University. It was confirmed on 29 November 2014 that the bird was infected with
H5N8 influenza A virus. The result of gene sequencing indicated that a HA0 cleavage site of the amino acid sequence was consistent with that of
highly pathogenic avian influenza virus.
Case 2: Water collected from roost* of cranes on 1 December 2014 was tested against avian influenza virus. It was confirmed on 6 December 2014 that
H5N8 influenza A virus was detected in a sample. The result of gene sequencing indicated that a HA0 cleavage site of the amino acid sequence was consistent with that of
highly pathogenic avian influenza virus. *artificial wet paddy in a nationally-designated bird sanctuary in Izumi-shi
Case 3: A dead Grus monacha (hooded crane) was collected on 7 December 2014 and tested against avian influenza virus. It was confirmed on 10 December 2014 that the bird was infected with H5N8 influenza A virus. The result of gene sequencing indicated that a HA0 cleavage site of the amino acid sequence was consistent with that of highly pathogenic avian influenza virus.
Outbreak in domestic birds On 15 December 2014, the local veterinary service in Miyazaki Prefecture received a notification from a broiler breeder farm on an increase in the number of dead birds (one bird on 13 December, 12 birds on 14 December and 19 birds on 15 December). The samples were sent to the laboratory of local veterinary service (Miyazaki Livestock Hygiene 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 test and confirmed that the subtype was H5 on 16 December 2014 (midnight of 15 December 2014). Stamping-out policy was applied to the affected farm. Destruction of all the susceptible birds in the affected farm (approx. 4,000 birds) was completed in the morning of 16 December 2014. 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.
The N-type has not yet been identified.
OIE
