OIE: Influenza A H1N1, Chile

OIE: Influenza A H1N1, Chile
submited by kickingbird at Aug, 22, 2009 2:19 AM from OIE

Information received on 21/08/2009 from Dr Ternicier Claudio, Jefe División Protección Pecuaria, Servicio Agrícola y Ganadero, Ministerio de Agricultura , Santiago , Chile

Summary

Report type	Immediate notification
Start date	23/07/2009
Date of first confirmation of the event	20/08/2009
Report date	21/08/2009
Date submitted to OIE	21/08/2009
Reason for notification	Emerging disease
Morbidity	61.4 %
Mortality	0 %
Zoonotic impact	No
Causal agent	Influenza A Virus
This event pertains to	the whole country

New outbreaks

Summary of outbreaks

Total outbreaks: 2

Location(s)

VALPARAISO (Las Palmas, Quilpue, Valparaiso; Pucalán, Quillota, Nogales)

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Birds	59554	36585	0	0	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	61.43%	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

Unknown or inconclusive

Epidemiological comments

The affected farms are turkey breeding premises belonging to the same company, vertically integrated, where appropriate biosecurity measures are applied.

Outbreak no. 1 is composed of 5 breeding premises. The outbreak started in premises no. 1 and through horizontal transmission, it reached 3 other premises.

In the outbreak n. 2 of 5 existing sectors are affected.

Prior to the appearance of clinical signs, some birds were exposed to people showing respiratory symptoms.
The affected premises were systematically monitored through serological testing with negative results until 28 July 2009.
Serotyping allowed to exclude the presence of H5 and H7 virus and allowed to confirm detection of A/H1N1 2009 pandemic influenza virus 2009.
Samples were sent to the Public Health Institute of Chile (ISP), Ministry of Health. The ISP confirmed the presence of A/H1N1 2009 pandemic influenza virus 2009 using real time PCR. The RT-PCR for seasonal H1 and H3 influenza resulted negative.
Samples will be sent to the OIE Reference Laboratory.

Control measures

Measures applied	Quarantine Screening Disinfection of infected premises/establishment(s) Vaccination prohibited No treatment of affected animals
Measures to be applied	No other measures

Diagnostic test results

Laboratory name and type

Public Health Institute (National laboratory)

Tests and results

Species	Test	Test date	Result
Birds	real-time PCR	20/08/2009	Positive
Birds	virus sequencing	21/08/2009	Pending

Laboratory name and type

Quarantine Station and Lo Aguirre Laboratory (National laboratory)

Tests and results

Species	Test	Test date	Result
Birds	agar-gel immunodiffusion (AGID)	15/08/2009	Positive
Birds	antibody detection ELISA	14/08/2009	Positive
Birds	haemagglutination inhibition test (HIT)	19/08/2009	Positive
Birds	neuraminidase inhibition assay	19/08/2009	Positive

Future Reporting

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

See Also:

http://www.oie.int

Latest news in those days:

USCDC Confirms Human Cases of H5 Bird Flu Among Colorado Poultry Workers 1 days ago
GISAID: H5N1 Bird Flu Circulating in Dairy Cows in the United States 2 days ago
USCDC: Colorado Reports Three Presumptive Positive H5 Cases in Poultry Workers 4 days ago
USCDC: A(H5N1) Bird Flu Response Update, July 12, 2024 5 days ago
Avian flu: increased vigilance recommended 6 days ago

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