Taiwan: Low pathogenic avian influenza (poultry) H5N3, Chinese Taipei (OIE, August 2 2013): 1 New Outbreak - Follow up report says H5N2?

[Giuseppe]

[Source: OIE, full page: (LINK). Edited.]


Low pathogenic avian influenza (poultry) H5N3, Chinese Taipei


Information received on 02/08/2013 from Dr Ping-Cheng Yang, Director, Animal Technology Institute Ta?wan, Council of Agriculture, Ta?wan, Chinese Taipei

• Summary
  • Report type Immediate notification
  • Date of start of the event 03/07/2013
  • Date of pre-confirmation of the event 16/07/2013
  • Report date 02/08/2013
  • Date submitted to OIE 02/08/2013
  • Reason for notification First occurrence of a listed disease
  • Manifestation of disease Sub-clinical infection
  • Causal agent Low pathogenic avian influenza
  • Serotype H5N3
  • Nature of diagnosis Laboratory (advanced)
  • This event pertains to the whole country
• New outbreaks
  • Summary of outbreaks
    • Total outbreaks: 1
      • Outbreak Location - HUA-LIEN ( Yuli )
        • Total animals affected: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • Birds - 13400 - 20 - 0 - 0 - 0
        • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
          • Birds - 0.15% - 0.00% - 0.00% - 0.00%
          • * 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
  • During the first round surveillance conducted on the poultry farms around the H5N2 infected duck farm detected in Hua-Lien County, the H5N3 avian influenza virus was isolated from swabs taken from a meat-type duck farm on 16 July 2013.
  • Movement restriction was conducted on this infected farm.
  • The result of clinical investigation showed that the duck were in healthy condition without clinical signs and abnormal mortality.
  • Subsequently, the national laboratory confirmed this H5N3 case as LPAI by virological tests and pathogenicity test on 2 August 2013.
  • The surveillance of poultry farms around the H5N3 affected farm are in progress.
  • 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 (2012).
• Control measures
  • Measures applied
    • Quarantine
    • Movement control inside the country
    • Screening
    • Disinfection of infected premises/establishment(s)
    • No vaccination
    • No treatment of affected animals
  • Measures to be applied
    • No other measures
• Diagnostic test results
  • Laboratory name and type - Animal Health Research Institute (National laboratory)
    • Tests and results: Species - Test - Test date - Result
      • Birds - gene sequencing - 18/07/2013 - Negative
      • Birds - intravenous pathogenicity index (IVPI) test - 02/08/2013 - Negative
      • Birds - virus isolation - 16/07/2013 - Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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[tetano]

Re: Low pathogenic avian influenza (poultry) H5N3, Chinese Taipei (OIE, August 2 2013): 1 New Outbreak

OIE -LPAI Outbreaks Detected in Taiwan
05 August 2013

TAIWAN - The Taiwanese veterinary authorities have reported two outbreaks of low pathogenic avian influenza (LPAI) in Hua-Lien affecting ducks.

The World Organisation for Animal Health (OIE) was notified twice on the same date last week (2 August) about the outbreaks.

In the first outbreak, the causal agent was identified as LPAI virus, serotype H5N3. A total of 13,400 ducks were found susceptible, out of which 20 cases were reported. No deaths were recorded and no birds were destroyed.

In the follow-up report, the causal agent was found to be the LPAI virus, serotype H5N2. A total of 11,672 ducks showed signs of susceptibility, out of which 20 cases were reported. Again, there were no deaths, and none of the birds were destroyed.

According to the immediate notification sent to the OIE, during the first round surveillance conducted on the poultry farms around the H5N2 infected duck farm detected in Hua-Lien County, the H5N3 avian influenza virus was isolated from swabs taken from a meat-type duck farm on 16 July 2013.

Movement restriction was conducted on this infected farm. The result of clinical investigation showed that the duck were in healthy condition without clinical signs and abnormal mortality. Subsequently, the national laboratory confirmed this H5N3 case as LPAI by virological tests and pathogenicity test on 2 August 2013.

The surveillance of poultry farms around the H5N3 affected farm are in progress.

According to the follow-up report, the low pathogenic viral infection was detected on a meat-type duck farm in the process of active surveillance and identified as H5N2 strain by virus isolation. Movement restriction and investigation were implemented on the infected farm.

The ducks within the farm were normal without clinical signs. Subsequently, the national laboratory confirmed this H5N2 outbreak as LPAI by virological tests and pathogenicity test on 2 August 2013.

The surveillance of poultry farms around the H5N2-affected farm is in progress.

The source of the outbreaks remains inconclusive.

http://www.thepoultrysite.com/poultrynews/29679/lpai-outbreaks-detected-in-taiwan