A/H1N1 influenza,
Argentina

Information received on 25/06/2009 from Dr Jorge Nestor Amaya, Presidente, Presidencia, SENASA, BUENOS AIRES, Argentina

Summary

Report type Immediate notification
Start date 15/06/2009
Date of first confirmation of the event 24/06/2009
Report date 25/06/2009
Date submitted to OIE 25/06/2009
Date event resolved 05/10/2009
Reason for notification Emerging disease
Morbidity 30 %
Mortality 0 %
Zoonotic impact An investigation is on-going since it is suggested that the origin is the contact with sick humans.
Causal agent A/H1N1 influenza virus
Related reports

New outbreaks
Outbreak 1 San Andrés de Giles, San Andrés de Giles, BUENOS AIRES
Date of start of the outbreak 15/06/2009
Outbreak status Resolved (18/09/2009)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Swine 5586 823 0 0 0
Affected Population A commercial pig farm with biosecurity measures in place and its own restocking system; a 4.5-hectares area. No other animal species in the farm. The distribution of the animals is as follows: 516 sows, 7 hogs, 2,900 castrated pigs, 58 young sows and 2,105 sucking pigs. In the immediate notification published on 25 June 2009, the number of cases reported (1,676) represented 30% of the total population in the farm (5,586), according to the first collected information. However, this data was wrong since the morbidity has to be estimated only for the affected categories (sucking pigs, growing pigs and fattening pigs). Therefore, the actual data concerning the number of cases is 823 animals. No new sick animals have been observed. No deaths have been attributed to this virus.
Summary of outbreaks Total outbreaks: 1
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Swine 14.73% 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
  • Under investigation
Epidemiological comments Between 7 and 9 June 2009, two workers of the farm showed flu signs, but they did not consult a doctor nor made diagnostic tests.
The farm has its own restocking system. The last entry of animals occurred in July 2008. The farm applies biosecurity measures and the animals only leave the farm for slaughter.
Since 24 June 2009, no clinical signs have been observed in the animals of that establishment.

Control measures
Measures applied
  • Quarantine
  • 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 Malbrán Institute (National laboratory)
Tests and results
Species Test Test date Result
Swine reverse transcription - polymerase chain reaction (RT-PCR) 24/06/2009 Positive

Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.

Map of outbreak locations
Location of current outbreaks

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