Published Date: 2003-12-13 23:50:00
Subject: PRO/AH/EDR> Avian influenza - South Korea (02): OIE
Archive Number: 20031213.3049
AVIAN INFLUENZA - SOUTH KOREA (02): OIE
A ProMED-mail post
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International Society for Infectious Diseases
Date: 12 Dec 2003
From: ProMED-mail <email@example.com>
Source: Office International des Epizooties(OIE), Disease Information [edited]
Highly pathogenic avian influenza in Korea (Rep. of ~)
(Disease never reported before in the Republic of Korea).
Information received on 12 Dec 2003 from Dr Chang-Seob Kim, Chief
Veterinary Officer, Animal Health Division, Ministry of Agriculture and
Forestry (MAF), Gwacheon:
Date of the report: 12 Dec 2003.
Date of initial detection of animal health incident: 11 Dec 2003.
Location Eumsung district, Chungcheong-buk province, in the central part of
No. of outbreaks: 1 farm
Description of affected population: a parent stock farm for broilers.
Total number of animals in the outbreak:
species / susceptible / cases / deaths / destroyed / slaughtered
avi / 24 000* / 19 000 / 19 000 / 5000 / 0
* 47-week-old poultry
A. Laboratory where diagnosis was made: National Veterinary Research and
Quarantine Service, Anyang, Kyonggi.
B. Diagnostic tests used: polymerase chain reaction (PCR) positive on 12
C. Causal agent: avian influenza virus subtype H5. The sequencing of the
gene is in progress.
A. Source of agent / origin of infection: unknown. Under investigation.
B. Mode of spread: unknown.
C. Other epidemiological details:
- Migrating birds have frequently been observed in a corn field next to the
- No clinical signs of highly pathogenic avian influenza have been detected
in any other farm.
- There is only one farm within a 1-km radius of the farm where highly
pathogenic avian influenza is suspected.
- stamping out;
- zoning; movement restrictions set up within a 10-km-radius zone around
the affected farm;
- vaccination is prohibited.
[This is not good news, as recent outbreaks of Avian Influenza have been in
the southeastern most part of China in Guangdong Province and Hong Kong,
beginning with the now historic outbreak of bird-to-human H5N1 in 1997. OIE
indicates South Korea has never had the disease before, and Japan has not
had an outbreak since 1925. Several outbreaks have been reported in Europe
and United States over the past few years. Eradication is usually is a
difficult process and costly in the best of circumstances.
Generally chickens and turkeys exhibit severe depression, inappetence,
significant drops in egg production, edema of the head, and cyanotic combs
and wattles. Mortality is usually high, sometimes reaching 100
percent. The postmortem picture contains many features, the most notable
of which include edema of the head and neck area, severe congestion of
conjunctiva and hemorrhages in the intestines, particularly on the mucosal
surface of the proventriculus (part of the cranial stomach of birds that
secretes acid and is located between the crop and gizzard). Necrosis of
intestinal lymphoid tissue is also a prominent postmortem feature. - Mod.PC]