Highly pathogenic avian influenza,
United Kingdom
Information received on 17/11/2014 from Dr Nigel Gibbens, Chief Veterinary Officer, Department for Environment, Food and Rural Affairs, Department for Environment, Food and Rural Affairs, LONDON, United Kingdom
Summary
Report type Immediate notification
Date of start of the event 14/11/2014
Date of confirmation of the event 16/11/2014
Report date 17/11/2014
Date submitted to OIE 17/11/2014
Date event resolved 21/11/2014
Reason for notification Recurrence of a listed disease
Date of previous occurrence 20/08/2008
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H5
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (17/11/2014)
Follow-up report No. 1 (21/11/2014)
Follow-up report No. 2 (27/11/2014)
Follow-up report No. 3 (05/12/2014)
Follow-up report No. 4 (12/12/2014)
Follow-up report No. 5 (19/12/2014)
Follow-up report No. 6 (22/12/2014)
Follow-up report No. 7 (02/01/2015)
Follow-up report No. 8 (09/01/2015)
Follow-up report No. 9 (16/01/2015)
Follow-up report No. 10 (23/01/2015)
Follow-up report No. 11 (30/01/2015)
Follow-up report No. 12 (06/02/2015)
Follow-up report No. 13 (13/02/2015)
Follow-up report No. 14 (17/02/2015)
New outbreaks (1)
Outbreak 1 (AIV/2014/01) East Riding of Yorkshire, ENGLAND
Date of start of the outbreak 14/11/2014
Outbreak status Resolved (21/11/2014)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 6178 803 803 5375 0
Affected population Housed duck breeding flock of approximately 6,000 60-week-old birds. The birds showed signs of slightly raised mortality and a gradual but marked drop in egg production. An underlying bacterial / fungal infection is likely to have preceded the infection by avian influenza contributing to presentation of clinical signs. Update on 21/11/2014 - As the birds have been destroyed and preliminary cleansing and disinfection is completed, this outbreak has now been closed. Update on 17/02/2015 - Final cleansing and disinfection was completed on 13 February 2015. This event is now closed.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 6178 803 803 5375 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 13.00% 13.00% 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 The epidemiological investigation has started in response to the outbreak and early information indicates that the unit routinely applies high standards of biosecurity and had not moved any birds or eggs from the premises in the preceding week. Updates will be provided in the weekly reports as further information becomes available.
Control measures
Measures applied
  • Movement control inside the country
  • Screening
  • Disinfection / Disinfestation
  • Quarantine
  • Zoning
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • Stamping out
Diagnostic test results
Laboratory name and type Species Test Test date Result
Animal and Plant Health Agency (APHA) Weybridge (OIE Reference Laboratory) Birds haemagglutination inhibition test (HIT) 16/11/2014 Negative
Animal and Plant Health Agency (APHA) Weybridge (OIE Reference Laboratory) Birds intravenous pathogenicity index (IVPI) test Pending
Animal and Plant Health Agency (APHA) Weybridge (OIE Reference Laboratory) Birds nucleotide sequencing 16/11/2014 Positive
Animal and Plant Health Agency (APHA) Weybridge (OIE Reference Laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 16/11/2014 Positive
Animal and Plant Health Agency (APHA) Weybridge (OIE Reference Laboratory) Birds neuraminidase inhibition assay Pending
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations