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Chile - 1 new outbreak of low pathogenic avian influenza H7N6 in backyard birds, Valparaiso (OIE, February 7, 2017)
Chile - 1 new outbreak of low pathogenic avian influenza H7N6 in backyard birds, Valparaiso (OIE, February 7, 2017)
Low pathogenic avian influenza (poultry),
Chile
Information received on 07/02/2017 from Dr Jose Ignacio G?mez Meza, Jefe de la Divisi?n de Protecci?n Pecuaria, Servicio Agr?cola y Ganadero (SAG), Ministerio de Agricultura, Santiago, Chile
Summary
Report type
Follow-up report No. 3
Date of start of the event
26/12/2016
Date of confirmation of the event
06/01/2017
Report date
07/02/2017
Date submitted to OIE
07/02/2017
Reason for notification
First occurrence of a listed disease in the country
The susceptible population was mainly chickens, and, to a lesser extent, ducks, geese and turkeys. The five positive animals were chickens.
Summary of outbreaks
Total outbreaks: 1
Total animals affected
Species
Susceptible
Cases
Deaths
Destroyed
Slaughtered
Birds
425
5
0
425
0
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Birds
1.18%
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
The finding occurred in a backyard, located within the perifocal area of the 2nd outbreak (El Mel?n). The owner runs a small business specialized in land preparation, excavation and earth-moving works, and load operations and water transport. His equipment is stored within the premises where the positive birds are. The business has been operating in the Las Palmas farm (outbreak 1) since the beginning of the event, and then operated within the area of El Mel?n (outbreak 2). This business represents a strong epidemiological link between both primary outbreaks. Following the new detection, the affected premises were put under quarantine and additional samples were taken from birds. Furthermore, the Farming and Agricultural Service (SAG) decided to pre-emptively destroy the whole bird population in this farm and adjacent farms. To date, the sampling of backyard birds from all farms within the area resulted negative.
Control measures
Measures applied
Disinfection / Disinfestation
Traceability
Quarantine
Surveillance outside containment and/or protection zone
Surveillance within containment and/or protection zone
Control of wildlife reservoirs
Zoning
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
Official Laboratory Lo Aguirre (National laboratory)
Birds
agar-gel immunodiffusion (AGID)
28/01/2017
Positive
Official Laboratory Lo Aguirre (National laboratory)
Birds
real-time PCR
02/02/2017
Negative
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
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