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

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Low pathogenic avian influenza (poultry), Chile

Information received on 05/09/2019 from Dr Oscar Eduardo Videla P?rez, Jefe de Divisi?n de Protecci?n Pecuaria, Servicio Agr?cola 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.

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https://www.oie.int/wahis_2/public/w...reportid=31653

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Low pathogenic avian influenza (poultry), Chile

Information received on 14/09/2019 from Dr Oscar Eduardo Videla P?rez, Jefe de Divisi?n de Protecci?n Pecuaria, Servicio Agr?cola 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.

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https://www.oie.int/wahis_2/public/w...reportid=31727

[Pathfinder]

Low pathogenic avian influenza (poultry), Chile

Information received on 17/10/2019 from Dr Oscar Eduardo Videla P?rez, Jefe de Divisi?n de Protecci?n Pecuaria, Servicio Agr?cola 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.

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https://www.oie.int/wahis_2/public/w...reportid=32141