A/H1N1 influenza, Argentina (WAHID Interface - OIE World Animal Health Information Database, July 28, 2009, edited)

[Giuseppe]

A/H1N1 influenza, Argentina (WAHID Interface - OIE World Animal Health Information Database, July 28, 2009, edited)

A/H1N1 influenza, Argentina

Information received on 28/07/2009 from Dr Jorge Nestor Amaya, Presidente, Presidencia, SENASA, BUENOS AIRES, Argentina


-- Summary
Report type Follow-up report No. 3
Start date 15/06/2009
Date of first confirmation of the event 24/06/2009
Report date 24/07/2009
Date submitted to OIE 28/07/2009
Reason for notification Emerging disease
Morbidity 15 %
Mortality 0 %
Zoonotic impact Se est? investigando ya que la hip?tesis indicar?a que el origen fueron contactos humanos enfermos.
Causal agent A/H1N1 influenza virus
Serotype Other
This event pertains to the whole country
Related reports
* Immediate notification (25/06/2009)
* Follow-up report No. 1 (01/07/2009)
* Follow-up report No. 2 (08/07/2009)
* Follow-up report No. 3 (24/07/2009)

-- Outbreaks
There are no new outbreaks in this report

-- Epidemiology
Source of the outbreak(s) or origin of infection
* Under investigation

-- Epidemiological comments
Health measures applied around the first outbreak and in its surveillance zone were lifted. No new infected animals have been reported since 24 June. Animals are sent regularly to slaughter after clinical inspection. Health measures are maintained in the second outbreak and around. No new health event has been reported.

Laboratory: Virus isolation was carried out on Madin-Darby canine cells (MDCK). The RNA extraction was performed as well as the amplification of the fragments corresponding to segment 4 (HA), segment 5 (NP), segment 8 (NS) and the fraction of segment 7 encoding M1.

The percentage identity of the sequences obtained from two reference isolates A/California/04/2009(H1N1) and A/swine/Alberta/OTH-33-8/2009(H1N1) are higher than 99.99%.

Once the genome sequencing completed, the sequences will be submitted to the GenBank database.

-- Control measures
Measures applied
* Quarantine
* Screening
* Zoning
* 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 Virology Institute, CICVyA, INTA (National laboratory)
Tests and results: Species - Test - Test date - Result
- Swine - virus isolation - 21/07/2009 - Positive
- Swine - virus sequencing - 21/07/2009 - Positive

-- Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
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<cite cite="http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=8321">WAHID Interface - OIE World Animal Health Information Database</cite>

 

[HenryN]

Re: A/H1N1 influenza, Argentina (WAHID Interface - OIE World Animal Health Information Database, July 28, 2009, edited)

A/H1N1 influenza, Argentina (WAHID Interface - OIE World Animal Health Information Database, July 28, 2009, edited)

A/H1N1 influenza, Argentina


The percentage identity of the sequences obtained from two reference isolates A/California/04/2009(H1N1) and A/swine/Alberta/OTH-33-8/2009(H1N1) are higher than 99.99%.

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<CITE cite="http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=8321">WAHID Interface - OIE World Animal Health Information Database</CITE>

The California and Alberta swine are relatively rare. If these sequences have the highest homology, then this is VERY significant (implies that pandemic H1N1 in swine is widespread).