Low pathogenic avian influenza (poultry), Korea (Rep. of) (WAHID Interface - OIE World Animal Health Information Database, 6/4/10, edited)

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Low pathogenic avian influenza (poultry), Korea (Rep. of) (WAHID Interface - OIE World Animal Health Information Database, 6/4/10, edited)

[Source: OIE, <cite cite="http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=9349" >WAHID Interface - OIE World Animal Health Information Database</cite>. Edited.]

Low pathogenic avian influenza (poultry), Korea (Rep. of)

Information received on 04/06/2010 from Dr Kiyoon Chang, CVO & Director, Labelling, Quarantine and Inspection Division, Food Safety & Consumer Affairs Policy Bureau, MIFAFF (Ministry of Food, Agriculture, Forestry and Fisheries) , Gyeonggi -Do, Korea (Rep. of)

• Summary
  • Report type Follow-up report No. 1
  • Start date 13/05/2010
  • Date of first confirmation of the event 20/05/2010
  • Report date 04/06/2010
  • Date submitted to OIE 04/06/2010
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 27/12/2009
  • Manifestation of disease Sub-clinical infection
  • Causal agent Low pathogenic avian influenza virus
  • Serotype H7N7
  • Nature of diagnosis Laboratory (advanced)
  • This event pertains to a defined zone within the country
  • Related reports
    • Immediate notification (21/05/2010)
    • Follow-up report No. 1 (04/06/2010)

• New outbreaks
  • Outbreak 1 - Samseo-myun, Jangsung-gun, CHOLLA-NAMDO
    • Date of start of the outbreak 18/05/2010
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Birds - 24697 - ... - 0 - 24697 - 0
      • Affected Population Ducks
  • Outbreak 2 - Hwajeong-dong, Namwon-city, CHOLLA-BUKDO
    • Date of start of the outbreak 25/05/2010
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Birds - 687 - ... - 0 - 687 - 0
      • Affected Population Ducks
  • Outbreak 3 - Osan-myun, Goksung-gun, CHOLLA-NAMDO
    • Date of start of the outbreak 22/05/2010
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Birds - 4200 - ... - 0 - 4200 - 0
      • Affected Population Ducks
  • Outbreak 4 - Yongjeong-dong, Namwon-city, CHOLLA-BUKDO
    • Date of start of the outbreak 25/05/2010
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Birds - 3298 - ... - 0 - 3298 - 0
      • Affected Population Ducks

• Summary of outbreaks
  • Total outbreaks: 4
  • Total animals affected: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
    • Birds - 32882 - ** - 0 - 32882 - 0
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
    • Birds - ** - 0.00% - ** - 100.00%
    • * Removed from the susceptible population through death, destruction and/or slaughter
    • ** Not calculated because of missing information

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

• Epidemiological comments
  • After the previous LPAI outbreaks in Cholla-namdo on 13 May 2010, the local veterinary authorities have been tracing the epidemiologically linked farms and conducting tests for avian influenza.
  • During the testing for avian influenza, two duck farms in Cholla-namdo and two duck farms in Cholla-bukdo were found to be positive by haemagglutination tests on 26 May and 2 June, respectively.
  • The National Veterinary Research and Quarantine Service (NVRQS) found avian influenza antigen (H7) by PCR on 26 May and 2 June. The NVRQS then confirmed it as low pathogenic avian influenza virus (H7N7) by gene sequencing on 27 May and 3 June.
  • The poultry in the farms were culled as a precautionary measure and disinfection and other control measures were implemented.
  • Currently, clinical surveillance and laboratory testing are underway for these epidemiologically linked farms.
  • Note by the OIE Animal Health Information Department: H5 and H7 avian influenza in its low pathogenic form in poultry is a notifiable disease as per Chapter 10.4. on avian influenza of the Terrestrial Animal Health Code (2009).

• Control measures
  • Measures applied
    • Stamping out
    • Quarantine
    • Movement control inside the country
    • Screening
    • Zoning
    • Disinfection of infected premises/establishment(s)
    • Vaccination prohibited
    • No treatment of affected animals
  • Measures to be applied
    • No other measures

• Diagnostic test results
  • Laboratory name and type National Veterinary Research and Quarantine Service (NVRQS) (National laboratory)
    • Tests and results: Species - Test - Test date - Result
      • Birds - gene sequencing - 27/05/2010 - Positive
      • Birds - gene sequencing - 03/06/2010 - Positive
      • Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 26/05/2010 - Positive
      • Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 02/06/2010 - Positive

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

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