Pandemic A/H1N1 2009 virus, Ireland (WAHID Interface - OIE World Animal Health Information Database, 10/16/09, edited)

[Giuseppe]

Pandemic A/H1N1 2009 virus, Ireland (WAHID Interface - OIE World Animal Health Information Database, 10/16/09, edited)

Pandemic A/H1N1 2009 virus, Ireland

Information received on 16/10/2009 from Mr Patrick J. Rogan, Chief Veterinary Officer, Agriculture House, Department of Agriculture and Food, DUBLIN, Ireland

• Summary
  • Report type Follow-up report No. 1 (Final report)
  • Start date 25/09/2009
  • Date of first confirmation of the event 29/09/2009
  • Report date 16/10/2009
  • Date submitted to OIE 16/10/2009
  • Date event resolved 16/10/2009
  • Reason for notification Emerging disease
  • Morbidity 1.3 %
  • Mortality 0 %
  • Zoonotic impact Refer to OIE guidance/opinion
  • Causal agent Pandemic influenza A/H1N1 virus
  • Serotype Other
  • This event pertains to the whole country
  • Related reports
    • Immediate notification (29/09/2009)
    • Follow-up report No. 1 (16/10/2009)

• New outbreaks
  • Outbreak 1 (2/2009) - Kilmore, CAVAN
    • Date of start of the outbreak 25/09/2009
    • Outbreak status Resolved (16/10/2009)
    • Epidemiological unit Farm
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Swine - 2994 - 65 - 1 - 0 - 0
    • Affected Population
      • Breeding and fattening farm containing 294 breeding animals and 2,700 fattening pigs.

• Summary of outbreaks
  • Total outbreaks: 1
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
    • Swine - 2.17% - 0.03% - 1.54% - 0.03%
    • * Removed from the susceptible population through death, destruction and/or slaughter

• Epidemiology
  • Source of the outbreak(s) or origin of infection
    • An infected farm worker

• Epidemiological comments
  • Two people involved in the sampling of the pigs of the index outbreak developed influenza-like illness two days after carrying out the sampling. Both have since been confirmed positive for pandemic influenza H1N1 2009. There have been no further pigs affected in this herd. This outbreak has now been resolved. In the second outbreak mild respiratory signs were seen in sows, unweaned piglets and fattening pigs. Samples from a single fattening pig that died on 29 September 2009 were submitted to a laboratory in Northern Ireland for routine respiratory disease surveillance. This animal was positive for influenza A/H1N1 2009 and also had concurrent infection with Streptococcus suis. Partial gene sequencing showed 99-100% similarity with H1N1 pandemic viruses and 80-84% with endemic European swine H1N1 viruses. One worker had mild viral respiratory illness that preceded clinical signs in the pigs. There are currently no clinical signs in this herd. There is no link between this outbreak and the first outbreak reported. Given the extent of human infection with this virus, it is likely that further outbreaks of mild respiratory disease in pigs will occur. No further outbreaks will be reported unless there is a significant change in the epidemiology of the disease.

• Control measures
  • Measures applied
    • No vaccination
    • No treatment of affected animals
  • Measures to be applied
    • No other measures

• Future Reporting
  • The event is resolved. No more reports will be submitted.

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<cite cite="http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=8528">WAHID Interface - OIE World Animal Health Information Database</cite>