Pandemic Influenza A H1N1 (2009), United Kingdom (WAHID Interface - OIE World Animal Health Information Database, 9/25/09, edited)

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Pandemic Influenza A H1N1 (2009), United Kingdom (WAHID Interface - OIE World Animal Health Information Database, 9/25/09, edited)

Pandemic Influenza A H1N1 (2009), United Kingdom

Information received on 25/09/2009 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 Follow-up report No. 1
  • Start date 18/08/2009
  • Date of first confirmation of the event 16/09/2009
  • Report date 25/09/2009
  • Date submitted to OIE 25/09/2009
  • Reason for notification Emerging disease
  • Morbidity 90 %
  • Mortality 0.1 %
  • Zoonotic impact Refer to OIE guidance/opinion
  • Causal agent Pandemic H1N1 virus (2009)
  • Serotype Other
  • This event pertains to the whole country
  • Related reports
    • Immediate notification (18/09/2009)
    • Follow-up report No. 1 (25/09/2009)

• New outbreaks
  • Outbreak 1 (NI Flu 2) Cookstown, County Tyrone, NORTHERN IRELAND
    • Date of start of the outbreak 18/08/2009
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
    • Swine - 2900 - 1950 - 30 - 0 - 0
    • Affected Population: Birth to bacon unit with all pigs kept on the one premises. 340 sows, with approximately 2,900 pigs in total. First signs (coughing) appeared in 10-15 week old weaned pigs about one month ago with some deaths (2-3% increase). Signs (coughing) in fattener pigs about 2 weeks ago, which are now almost back to normal. No pigs brought onto farm since 8 July 2009.
  • Outbreak 2 (NI Flu 3) Bellaghy, County Londonderry, NORTHERN IRELAND
    • Date of start of the outbreak 22/09/2009
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
    • Swine - 145 - 4 - 0 - 0 - 0
    • Affected Population: Three weeks ago, 90 gilts and 55 boars from the same premises were moved to the current farm in this report for isolation. Gilts and boars were housed separately in different buildings. All animals were pre-export tested. 4 gilts gave positive test results, the remaining animals were negative. None of the pigs in isolation have shown any clinical signs.
    • Note by the OIE''s Animal Health Information Department: The 4 cases are cases of infection and not of clinical disease.

• Summary of outbreaks
  • Total outbreaks: 2
  • Total animals affected: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
  • Swine - 3045 - 1954 - 30 - 0 - 0
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
  • Swine - 64.17% - 0.99% - 1.54% - 0.99%
  • * Removed from the susceptible population through death, destruction and/or slaughterEpidemiology

• Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive

• Epidemiological comments
  • Outbreak 1 (Greenhill, notified on 18 September 2009): Closed unit. All animals leaving the unit go for slaughter. Only gilts are brought onto the unit. No known cases of human flu are currently associated with this outbreak. On 25 September 2009, medical investigations have found a possible source for the first pig herd notified and samples have been taken.
  • Outbreak 2 (Cookstown, notified on 25 September 2009): No known cases of human flu in the farm workers, although the herd owner had flu symptoms around 14 September 2009. No tangible epidemiological links between the identified infected premises.
  • Outbreak 3 (Bellaghy, notified on 25 September 2009): No known cases of human flu are currently associated with this outbreak. Workers are all family members or extended family members.

• Control measures
  • Measures applied
    • No vaccination
    • Treatment of affected animals (Oral antibiotics)
  • Measures to be applied
    • No other measures

• Diagnostic test results
  • Laboratory name and type: Veterinary Sciences Division, Stormont (National laboratory)
    • Tests and results: Species - Test - Test date - Result
    • Swine - gene sequencing - 18/09/2009 - Positive
    • Swine - real-time PCR - 18/09/2009 - Positive
  • Laboratory name and type: Veterinary Laboratories Agency (VLA), Weybridge (OIE?s Reference Laboratory)
    • Tests and results: Species - Test - Test date - Result
    • Swine - polymerase chain reaction (PCR) - 19/09/2009 - Positive
    • Swine - polymerase chain reaction (PCR) - 23/09/2009 - Positive
    • Swine - real-time PCR - 19/09/2009 - Positive
    • Swine - real-time PCR - 23/09/2009 - Positive

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

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<cite cite="http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=8465" >WAHID Interface - OIE World Animal Health Information Database</cite>