Published Date: 2007-08-01 13:00:07
Subject: PRO/AH/EDR> Porcine reproductive & respiratory syndrome - Viet Nam (09), OIE
Archive Number: 20070801.2479

PORCINE REPRODUCTIVE & RESPIRATORY SYNDROME - VIET NAM (09), OIE
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Date: Wed 01 Aug 2007
Source: OIE WAHID interface information database [edited]
<http://www.oie.int/wahid-prod/public.php?page=single_report&pop=1&reportid=5840>

Porcine reproductive and respiratory syndrome, Viet Nam
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Information received on 01/08/2007 from Mr Bui Quang Anh, Chief
Veterinary Officer, Department of Animal Health, Ministry of
Agriculture and Rural Development, HANOI, Viet Nam
Summary
Report type: Follow-up report No. 2
Start date: 12 Mar 2007
Date of confirmation of event: 26 Mar 2007
Report date: 01 Aug 2007
Date submitted to OIE: 01 Aug 2007
Reason for notification: 1st occurrence of a listed disease
Manifestation of disease: Clinical disease
Causal agent: PRRSV
Nature of diagnosis: Clinical, Laboratory (basic), Laboratory
(advanced), Necropsy
Report pertains to: Entire country
Related reports:
1.Immediate notification (10 Apr 2007)
2. Follow-up report No. 1 (19 Apr 2007)
3. Follow-up report No. 2 (01 Aug 2007)
New outbreaks
[The notification includes details of outbreaks in 31 locations,
situated in 8 provinces. The provinces and the number of outbreaks in
each of them, are: QUANG NINH(1); QUANG NAM (22); QUANG NGAI (2); HAI
PHONG CITY (1); LONG AN (1); THUA THIEN-HUE (2); VINH PHUC (1); DA
NANG CITY (1). For the full epidemiological data in each outbreak,
subscribers are referred to the original notification at the above
URL. - Mod.AS].
Summary of outbreaks:
Total outbreaks: 31
Total animals affected
Species/ Susceptible/ Cases/ Deaths/ Destroyed/ Slaughtered
Swine/ 41 528/ 24 285/ 3355/ 1256/ 790
Outbreak statistics
Species/ Apparent morbidity rate/ Apparent mortality rate/ Apparent
case fatality rate/ Proportion susceptible removed*
Swine/ 58.48 percent/ 8.08 percent/ 13.82 percent/ 13.01 percent
* Removed from the susceptible population either through death,
destruction or slaughter
Epidemiology
Source of infection:
- Introduction of new live animals
- Legal movement of animals
- Illegal movement of animals
- Airborne spread
Control measures:
Measures already applied:
- Movement control inside the country
- Disinfection of infected premises/establishment(s)
- Dipping / Spraying
- Quarantine
- Modified stamping out
- Vaccination permitted
- No treatment of affected animals
Measures to be applied: None specified
Diagnostic test results
1. Laboratory name and type: National Center for Veterinary Diagnosis
(National laboratory)
Tests and results
Species/ Test/ Test date/ Result
Swine/ real-time reverse transcriptase/polymerase chain reaction
(RRT-PCR)/ 15 Jul 2007/ Positive
2. Laboratory name and type: National Centre for Veterinary Diagnosis
(National laboratory)
Tests and results
Species/ Test/ Test date/ Result
Swine/ polymerase chain reaction (PCR)/ 26 Mar 2007/ Positive
--
Communicated by:
ProMED-mail
<promed@promedmail.org>
[The PRRS outbreak statistics provided by Viet Nam (31 outbreaks) are
reminiscent of those provided by China in its notification on PRRS of
9 May 2007 (one PRRS outbreak, Guandong; see 20070512.1517):
Country/No. outbreaks/ App morb rate/ App mort rate/ App case fatality rate
Viet Nam/ 31 / 58.48 percent/ 8.08 percent/ 13.82 percent
China/ 1 / 55.02 percent / 11.10 percent / 20.18 percent
As expressed in previous postings on the emerging porcine epizootic
in Viet Nam and China, it is desirable that PRRS virus isolates from
Viet Nam and China will be subjected to phylogenetic studies and
compared to each other, preferably by international reference
laboratories, which will also test samples from both countries to
exclude other pathogens.
Viet Nam's PRRS reporting frequency is exemplary. - Mod.AS].

See Also

Porcine reprod & resp syndr - China (Guangdong): OIE 20070512.1517
Undiagnosed disease, porcine - China (15) 20070725.2394
Streptococcus suis, human, porcine & PRRS - Viet Nam 20070726.2403
Porcine reproductive & respiratory syndrome - Viet Nam (08) 20070730.2444
Porcine reproductive & respiratory syndrome - Viet Nam (07) 20070721.2346
Porcine reproductive & respiratory syndrome - Viet Nam (06) 20070717.2293
Porcine reproductive & respiratory syndrome - Viet Nam (05) 20070512.1516
Porcine reproductive & respiratory syndrome - Viet Nam (04): OIE 20070422.1316
Porcine reproductive & respiratory syndrome - Viet Nam (03) 20070418.1281
Porcine reproductive & respiratory syndrome - Viet Nam (02): OIE 20070414.1245
Porcine reproductive & respiratory syndrome - Viet Nam: RFI 20070412.1225
....................arn/ejp/mpp
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