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Chile - Outbreaks of low pathogenic avian influenza H7N6 in birds in farms in Valparaiso

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  • Chile - Outbreaks of low pathogenic avian influenza H7N6 in birds in farms in Valparaiso

    Low pathogenic avian influenza (poultry),
    Chile
    Information received on 05/09/2019 from Dr Oscar Eduardo Videla Pérez, Jefe de División de Protección Pecuaria, Servicio Agrícola y Ganadero, Ministerio de Agricultura, Santiago, Chile
    Summary
    Report type Immediate notification
    Date of start of the event 27/08/2019
    Date of confirmation of the event 02/09/2019
    Report date 04/09/2019
    Date submitted to OIE 05/09/2019
    Reason for notification Recurrence of a listed disease
    Date of previous occurrence 08/03/2017
    Manifestation of disease Sub-clinical infection
    Causal agent Low pathogenic avian influenza virus
    Serotype H7
    Nature of diagnosis Laboratory (advanced)
    This event pertains to a defined zone within the country
    New outbreaks (1)
    Outbreak 1 El Peumo, Los Nogales, Valparaiso
    Date of start of the outbreak 27/08/2019
    Outbreak status Resolved (04/09/2019)
    Epidemiological unit Farm
    Affected animals
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Birds 67500 13000 0 67500 0
    Affected population Six-week old fattening turkeys. Positive results were obtained from a routine sampling internal to the company, dated August 27th, prior to a movement towards the final fattening site; consequently, there were no bird movements towards another site. On August 28th, the company in question notified a positive result to PCR test (type-A matrix). On the same day, the Service for Agriculture and Livestock (SAG) performed swabbing and serum sampling. On August 29th, serum samples gave negative results to agar-gel immunodiffusion tests, positive results to PCR (type-A matrix) and negative results to H7 and H5 PCR tests. Virus sequencing, dated September 2nd, gave a similar result to a low pathogenic H7 virus, discovered in wild birds in 2016. Virus samples will be sent to the OIE Reference Laboratory. No clinical sign was observed in the animals. All susceptible animals were killed and buried on the same farm, on September 3rd and 4th.
    Summary of outbreaks Total outbreaks: 1
    Total animals affected
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Birds 67500 13000 0 67500 0
    Outbreak statistics
    Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
    Birds 19.26% 0.00% 0.00% 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 A one-kilometer restriction zone was established around the affected farm as well as a two-kilometers surveillance zone, around the first one, within which active surveillance and epidemiological investigation are ongoing, in accordance with the provisions of the OIE Code.
    Control measures
    Measures applied
    • Movement control inside the country
    • Surveillance outside containment and/or protection zone
    • Surveillance within containment and/or protection zone
    • Quarantine
    • Stamping out
    • Zoning
    • Disinfection
    • Vaccination prohibited
    • No treatment of affected animals
    Measures to be applied
    • No other measures
    Diagnostic test results
    Laboratory name and type Species Test Test date Result
    Lo Aguirre Laboratory (National laboratory) Birds virus sequencing 02/09/2019 Positive
    Future Reporting
    The event is continuing. Weekly follow-up reports will be submitted.
    ...
    https://www.oie.int/wahis_2/public/w...reportid=31653
    "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
    -Nelson Mandela

  • #2
    Low pathogenic avian influenza (poultry),
    Chile
    Information received on 14/09/2019 from Dr Oscar Eduardo Videla Pérez, Jefe de División de Protección Pecuaria, Servicio Agrícola y Ganadero, Ministerio de Agricultura, Santiago, Chile
    Summary
    Report type Follow-up report No. 1
    Date of start of the event 27/08/2019
    Date of confirmation of the event 02/09/2019
    Report date 13/09/2019
    Date submitted to OIE 14/09/2019
    Reason for notification Recurrence of a listed disease
    Date of previous occurrence 08/03/2017
    Manifestation of disease Sub-clinical infection
    Causal agent Low pathogenic avian influenza virus
    Serotype H7N6
    Nature of diagnosis Laboratory (advanced)
    This event pertains to a defined zone within the country
    Related reports Immediate notification (04/09/2019)
    Follow-up report No. 1 (13/09/2019)
    Follow-up report No. 2 (27/09/2019)
    Follow-up report No. 3 (17/10/2019)
    New outbreaks (1)
    Outbreak 1 Santa Ana, Los Nogales, Valparaiso
    Date of start of the outbreak 10/09/2019
    Outbreak status Resolved (12/09/2019)
    Epidemiological unit Farm
    Affected animals
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Birds 39350 3461 0 0 39350
    Affected population 15-week-old fattening turkeys belonging to the same company as the first outbreak. Controlled slaughter is carried out in a slaughterhouse.
    Summary of outbreaks Total outbreaks: 1
    Total animals affected
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Birds 39350 3461 0 0 39350
    Outbreak statistics
    Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
    Birds 8.80% 0.00% 0.00% 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 A one-kilometer restriction zone was established around the affected farm as well as a one-kilometer surveillance zone around the first one, within which active surveillance and epidemiological investigation are ongoing, in accordance with the provisions of the OIE Code.
    Control measures
    Measures applied
    • Movement control inside the country
    • Surveillance outside containment and/or protection zone
    • Surveillance within containment and/or protection zone
    • Quarantine
    • Zoning
    • Disinfection
    • Slaughter
    • Vaccination prohibited
    • No treatment of affected animals
    Measures to be applied
    • No other measures
    Diagnostic test results
    Laboratory name and type Species Test Test date Result
    Lo Aguirre Laboratory (National laboratory) Birds virus sequencing 12/09/2019 Positive
    Future Reporting
    The event is continuing. Weekly follow-up reports will be submitted.
    ...

    https://www.oie.int/wahis_2/public/w...reportid=31727
    "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
    -Nelson Mandela

    Comment


    • #3
      Low pathogenic avian influenza (poultry),
      Chile
      Information received on 17/10/2019 from Dr Oscar Eduardo Videla Pérez, Jefe de División de Protección Pecuaria, Servicio Agrícola y Ganadero, Ministerio de Agricultura, Santiago, Chile
      Summary
      Report type Follow-up report No. 3
      Date of start of the event 27/08/2019
      Date of confirmation of the event 02/09/2019
      Report date 17/10/2019
      Date submitted to OIE 17/10/2019
      Reason for notification Recurrence of a listed disease
      Date of previous occurrence 08/03/2017
      Manifestation of disease Sub-clinical infection
      Causal agent Low pathogenic avian influenza virus
      Serotype H7N6
      Nature of diagnosis Laboratory (advanced)
      This event pertains to a defined zone within the country
      Related reports Immediate notification (04/09/2019)
      Follow-up report No. 1 (13/09/2019)
      Follow-up report No. 2 (27/09/2019)
      Follow-up report No. 3 (17/10/2019)
      New outbreaks (2)
      Outbreak 1 Los Tilos, Hijuelas, Valparaiso
      Date of start of the outbreak 10/10/2019
      Outbreak status Resolved (16/10/2019)
      Epidemiological unit Farm
      Affected animals
      Species Susceptible Cases Deaths Killed and disposed of Slaughtered
      Birds 39159 0 0 0 39159
      Affected population Sixteen-week-old fattening turkeys. Positive results were obtained from sampling by the company prior to shipment to slaughterhouse on 10th October. The birds were slaughtered on Tuesday 15th and Wednesday 16th.
      Outbreak 2 Romeral, Hijuelas, Valparaiso
      Date of start of the outbreak 12/10/2019
      Outbreak status Continuing (or date resolved not provided)
      Epidemiological unit Farm
      Affected animals
      Species Susceptible Cases Deaths Killed and disposed of Slaughtered
      Birds 40029 0 0 0 40029
      Affected population Fifteen-week-old turkeys. Positive sampling during active surveillance carried out by the company due to the outbreak in Los Tilos. Birds sent to slaughterhouse Thursday 17th and Friday 18th October.
      Summary of outbreaks Total outbreaks: 2
      Total animals affected
      Species Susceptible Cases Deaths Killed and disposed of Slaughtered
      Birds 79188 0 0 0 79188
      Outbreak statistics
      Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
      Birds 0.00% 0.00% ** 100.00%
      *Removed from the susceptible population through death, destruction and/or slaughter
      Epidemiology
      Source of the outbreak(s) or origin of infection
      • Fomites (humans, vehicles, feed, etc.)
      Epidemiological comments A one-kilometer restriction zone was established around the affected farm as well as a one-kilometer surveillance zone, around the first one, within which active surveillance and epidemiological investigation are ongoing, in accordance with the provisions of the OIE Code. Additional biosecurity measures are taken to contain the outbreak. Negative serum samples in both outbreaks. Each establishment had been sampled four times, and tested through PCR and serum, within the framework of the current outbreak, with negative results.
      Control measures
      Measures applied
      • Movement control inside the country
      • Surveillance outside containment and/or protection zone
      • Surveillance within containment and/or protection zone
      • Quarantine
      • Zoning
      • Disinfection
      • Slaughter
      • Vaccination prohibited
      • No treatment of affected animals
      Measures to be applied
      • No other measures
      Diagnostic test results
      Laboratory name and type Species Test Test date Result
      Lo Aguirre (National laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 14/10/2019 Positive
      Lo Aguirre (National laboratory) Birds virus sequencing 17/10/2019 Positive
      Future Reporting
      The event is continuing. Weekly follow-up reports will be submitted.

      ...
      https://www.oie.int/wahis_2/public/w...reportid=32141
      "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
      -Nelson Mandela

      Comment

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