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
Related reports Immediate notification (04/09/2019)
Follow-up report No. 1 (13/09/2019)
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.
Map of outbreak locations