Highly pathogenic avian influenza, Laos [WAHID Interface - OIE]

[Giuseppe]

Highly pathogenic avian influenza, Laos [WAHID Interface - OIE]

Highly pathogenic avian influenza, Laos

Information received on 10/11/2008 from Dr Khambounheuang Bounkhouang , Directeur G?n?ral, D?partement de l'Elevage et des P?ches , Minist?re de l'Agriculture et des For?ts , Vientiane, Laos

? Summary
Report type Follow-up report No. 1
Start date 27/08/2008
Date of first confirmation of the event 04/09/2008
Report date 10/11/2008
Date submitted to OIE 10/11/2008
Reason for notification Reoccurrence of a listed disease
Date of previous occurrence 02/2008
Causal agent Highly pathogenic avian influenza virus Serotype H5N1
Nature of diagnosis Suspicion, Clinical, Laboratory (advanced), Necropsy
This event pertains to the whole country
Related reports
* Immediate notification (14/09/2008)
* Follow-up report No. 1 (10/11/2008)

? New outbreaks
* Outbreak 1 - Donmai village, Xayabury, XAYABURY
Date of start of the outbreak 27/10/2008
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Village
Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
* Birds - 155 - 11 - 11 - 144 - 0
Affected population backyard poultry (114 chickens and 41 ducks)

? Summary of outbreaks
Total outbreaks: 1
Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
* Birds - 7.10% - 7.10% - 100.00% - 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
Culling of potential infected poultry within a one-km-radius zone is ongoing. Active surveillance is ongoing in the villages in the 5-km-radius zone around the outbreak.

? Control measures
Measures applied
* Stamping out
* Quarantine
* Movement control inside the country
* Screening
* Zoning
* Disinfection of infected premises/establishment(s)
* Dipping / Spraying
* Vaccination prohibited
* No treatment of affected animals
Measures to be applied
* No other measures

? Diagnostic test results
Laboratory name and type National Animal Health Centre (National laboratory)
Tests and results: Species - Test - Test date - Result
* Birds - real-time PCR - 30/10/2008 - Positive

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

<cite cite="http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=7504" >WAHID Interface - OIE World Animal Health Information Database</cite>

[HenryN]

Re: Highly pathogenic avian influenza, Laos [WAHID Interface - OIE]

Follow-up report No.: 1

Report reference: , OIE Ref: 7504, Report Date: 10/11/2008, Country: Laos

Report Summary

Disease

Highly pathogenic avian influenza Animal type Terrestrial

Causal Agent

Highly pathogenic avian influenza virus Serotype(s) H5N1

Clinical Signs

Yes Reason Reoccurrence of a listed disease

Date of first confirmation of the event

04/09/2008 Date of Start of Event 27/08/2008

Date of report

10/11/2008 Date Submitted To OIE 10/11/2008

Diagnosis

Suspicion, Clinical, Laboratory (advanced), Necropsy Date Of Last Occurrence 02/2008

Number Of Reported Outbreaks

Submitted= 3, Draft= 0 Name of Sender of the report Dr Khambounheuang Bounkhouang

Address

- Vientiane P.O. Box 811 Position Directeur G?n?ral

Telephone

(856-21) 416 932-415 674 Fax (856-21) 415 674

Email

dlf.maf@laopdr.com Entered by Dr Khambounheuang Bounkhouang

Outbreak (other report - submitted)

Province District Sub-district Unit Type Location Latitude Longitude Start date End Date

LUANGPRABANG Nambak Fa village Village Fa village 20,3732 102,2722 27/08/2008

Species Measuring units Susceptible Cases Deaths Destroyed Slaughtered

Birds Animals 5422 247 197 5225 0

Affected Population

Ducklings in a small commercial unit within a village with backyard poultry. They were purchased on 20 August 2008 and started to die on 27 August 2008 (about 4% and then increasing to 10% per day). Farmer reported it to the district officer on 1 September. Samples were confirmed to be
positive for HPAI H5N1 on 4 September 2008. The declaration of the CVO and the provincial governor was made on 5 September 2008. The infected flock was culled on 4 September 2008 and culling within the 1-Km-radius zone around the control zone started on 5 September 2008. Culling
was presumably completed on 12 September 2008 (backyard poultry). Legal purchase and movement from a farm in other province where illegal import is suspected. Investigation on that farm is on-going.

Outbreak (other report - submitted)

Province District Sub-district Unit Type Location Latitude Longitude Start date End Date

OUDOMXAY Xay Nalae village Village Nalae village 20,4035 101,5803 01/09/2008

Species Measuring units Susceptible Cases Deaths Destroyed Slaughtered

Birds Animals 1170 23 23 ... ...

Affected Population

The positive flock was discovered due to back tracing from Nambak outbreak. A surveillance zone of 5-Km-radius was drawn around the suspected farm in Oudomxay, from where the positive ducklings in Nambak originated, even though no positive animals were found on that farm. Very low
daily mortality (2%) was reported during disease investigation in one flock in Nalae village. This flock also originated from the same farm. Animals originated from the same farm as infected Nambak flock.

Outbreak (this report - submitted)

Printed on: Mon Nov 10 11:47:36 Paris, Madrid 2008 Page 1/3

Province District Unit Type Location Latitude Longitude Start date End Date

XAYABURY Xayabury Village Donmai village 19,4157 101,589 27/10/2008

Species Measuring units Susceptible Cases Deaths Destroyed Slaughtered

Birds Animals 155 11 11 144 0

Affected Population

backyard poultry (114 chickens and 41 ducks)

Outbreak summary: Total outbreaks = 3 (Submitted)

Species Susceptible Cases Deaths Destroyed Slaughtered

Birds 6747 281 231 5369 0

Epidemiology

Epidemiological comments

Culling of potential infected poultry within a one-km-radius zone is ongoing. Active surveillance is ongoing in the villages in the 5-km-radius zone around the outbreak.

Source of the outbreak(s) or origin of infection

? Unknown or inconclusive

Control Measures

? Stamping out
? Quarantine

Applied

? Movement control inside the country
? Screening
? Zoning
? Disinfection of infected premises/establishment(s)
? Dipping / Spraying

To be applied

? No Planned Control Measures

Animals treated

No

Vaccination Prohibited

Yes

Country / Zone

Country or zone

the whole country

Diagnostic test results

Laboratory Type Name of Laboratory Species Test Type Date Results Provided Result

National laboratory National Animal Health Centre Birds real-time PCR 30/10/2008 Positive

Future Reporting

What further reports will be submitted in relation to this event?

There are 3outbreaks that are still recorded as unresolved. It is not possible to declare this event resolved until these individual outbreaks are resolved.
The event is continuing. Weekly follow-up reports will be submitted.
Follow-up report No.: 1. Report reference: , OIE Ref: 7504, Report Date: 10/11/2008, Country: Laos

Printed on: Mon Nov 10 11:47:37 Paris, Madrid 2008 Page 2/3

http://www.oie.int/wahis/reports/en_fup_0000007504_20081110_114736.pdf

[HenryN]

Re: Highly pathogenic avian influenza, Laos [WAHID Interface - OIE]

Updated map

http://maps.google.com/maps/ms?ie=UTF8&hl=en&msa=0&msid=106484775090296685271.00044622013f3bba138f7&ll=19.792549,101.58783&spn=2.501456,3.164063&t=h&z=8

[HenryN]

Re: Highly pathogenic avian influenza, Laos [WAHID Interface - OIE]

Commentary

http://www.recombinomics.com/News/11100801/H5N1_Xayabury.html

[AlaskaDenise]

Re: Highly pathogenic avian influenza, Laos [WAHID Interface - OIE]

Commentary

http://www.recombinomics.com/News/11..._Xayabury.html

Commentary

H5N1 Spread to Xayabury Laos
Recombinomics Commentary 18:13
November 10, 2008

Donmai village, Xayabury, XAYABURY
Date of start of the outbreak 27/10/2008

Affected population backyard poultry (114 chickens and 41 ducks)

real-time PCR - 30/10/2008 ? Positive

The above comments from today?s OIE report from Laos describe a confirmed H5N1 outbreak in Xayabury. This outbreak follows two earlier outbreaks in northern Laos, and is followed by a confirmed outbreak in northern Thailand, less than two hundred miles southwest of the above outbreak (see satellite map).

These outbreaks in northern Laos and northern Thailand are likely to be related to each other and outbreaks in northern Vietnam. Recent reports have described a number of clade 2.3.4 reassortants in northern Vietnam. These genes are related to 7 of the 8 gene segments in wild bird isolates in Japan (HA is clade 2.3.2), which are closely related to poultry isolates in South Korea and Primorie, which were reported earlier this year.

The recent outbreaks signal migration of wild birds into the region, which will likely lead to reported outbreaks in the regions described above.


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