Published Date: 2010-04-13 23:50:00
Subject: PRO/MBDS> Porcine reproductive & respiratory syndrome - Viet Nam (02): Thai Binh, Thai Nguyen
Archive Number: 20100413.1194
PORCINE REPRODUCTIVE AND RESPIRATORY SYNDROME - VIET NAM (02): THAI
BINH, THAI NGUYEN
A ProMED-mail post
ProMED-mail is a program of the
International Society for Infectious Diseases
Date: Sun 11 Apr 2010
Source: Radio The Voice of Viet Nam (VOV) News [edited]
Blue ear pig disease has broken out in several northern provinces,
including Hai Duong, Thai Binh and Thai Nguyen, raising concerns
about epidemic prevention in localities.
Since the 1st case was detected in Hai Duong's Binh Giang district on
28 Mar 2010, the porcine reproductive and respiratory syndrome (PRRS)
virus has spread to Tu Ky and Gia Loc districts, with more than 650
pigs infected, of which 100 have already died.
The provincial Department of Animal Health blames the recent
outbreaks on unusual weather conditions, poor knowledge of farming
practices, and poor vaccination campaigns. In addition, farmers still
sell sick and infected pigs, paying no heed to warnings from veterinarians.
The department has supplied 6 tonnes of disinfectant to spray over
affected areas. Mobile checkpoints have been established to prevent
the slaughtering, trading and transport of infected pigs to and from
the restricted areas. Farmers and butchers have been encouraged not
to sell sick pigs.
"We have collaborated with the police and market management forces to
monitor sick pigs and cull those seriously infected," said Pham Dinh
Nghi, deputy head of the department. "We have disinfected farms twice
a week and enhanced the dissemination of information about the disease."
Infections have also been detected in a herd of 41 pigs in Phu Binh
district, Thai Nguyen province. Half the herd has been confirmed to
carry the PRRS virus.
In Thai Binh province, the virus has attacked 8 out of 44 communes in
Dong Dung district, with more than 1000 pigs sick or dead.
"It takes us a lot of time to wipe out the disease completely, and
this requires a large budget," says Vu Duy Viet, head of the Dong
Hung District Veterinary Agency. "In addition, we face a chronic lack
of veterinarians who are normally not provided with allowances to
work in communes. A low rate of vaccination and lax management of
trading and transporting of sick pigs are also major obstacles to
preventing an epidemic."
The Ministry of Agriculture and Rural Development (MARD) has
instructed the Red River Delta provinces to intensify preventative
measures, with a focus on quarantining sick pigs and vaccinating the others.
"Our staff are on duty around the clock running the hotline to
provide support if required," says Van Dang Ky, a MARD veterinary
expert. "The national reserve has a sufficient amount of vaccines and
disinfectants to be supplied to provinces and cities. Veterinarians
are asked to monitor suspected cases from door to door in localities
to ensure the epidemic will not spread far and wide."
Experts have warned that the current weather conditions are
favourable for the PRRS virus to emerge and spread to other
communities. Farmers have been advised to inform the nearest
veterinary agency about any cases with symptoms of the blue ear
disease and not to throw infected pigs into ponds or sell their meat
to local residents.
[According to the newswire, approximately 650 pigs were affected by
porcine reproductive and respiratory syndrome (PRRS) or blue ear
disease. Of 650 affected pigs, 100 pigs died. PRRS also affected 41
pigs in Thai Nguyen, and more than 1000 pigs in Thai Binh were
affected. In the meantime, Viet Nam officials are carrying out PRRS
control measures seriously. Based on Viet Nam's Department of Animal
Health (DAH) updates on highly pathogenic avian influenza, blue ear,
and foot and mouth disease (FMD), blue ear outbreaks have occurred in
3 provinces (Hai Duong, Thai Binh and Thai Nguyen) within the past 21 days.
There are some issues related to PRRS that are worth mentioning. PRRS
is easily transmitted through direct contact to susceptible pigs and
vertically to fetuses. The PRRSV (porcine respiratory and
reproductive syndrome virus) can be isolated from muscle and lymphoid
tissues up to 24 hours after slaughter. Although the PRRSV can
survive several weeks at 4 degree celsius in bone marrow, cooking,
curing and rendering are sufficient to inactivate PRRSV in meat. The
real threat occurs when unprocessed infected meat is fed to
susceptible pigs. PRRS entry into a farm or country is via imported
asymptomatically infected pigs and semen and swill feeding
(unprocessed infected meat).
More information on PRRS can be found in "Focus on... Porcine
reproductive and respiratory syndrome" from FAO EMPRES at:
More information on PRRS outbreaks in Viet Nam is available at
(in Vietnamese) and from the prior PRO/MBDS postings listed below.
For a map of Viet Nam with provinces, see
HealthMap/ProMED-mail interactive map of Viet Nam can be accessed at
<http://healthmap.org/r/00Ob>. This map shows other outbreaks in Viet
Nam and surrounding countries that have been reported on ProMED-mail
and PRO/MBDS. The postings can be directly accessed through this map. - Mod.TD]