Red sea bream iridoviral disease,
Japan
Information received on 08/11/2013 from Dr Toshiro Kawashima, CVO, Deputy Director-General, Food Safety and Consumer Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries, Tokyo, Japan
Summary
Report type Immediate notification (Final report)
Date of start of the event 21/10/2013
Date of confirmation of the event 24/10/2013
Report date 08/11/2013
Date submitted to OIE 08/11/2013
Date event resolved 29/10/2013
Reason for notification Listed disease occurring in new host species
New host species (Inimicus japonicus)
Scorpion fish (Inimicus japonicus)
Manifestation of disease Clinical disease
Causal agent Red sea bream iridovirus
Nature of diagnosis Laboratory (advanced)
New outbreaks (1)
Outbreak 1 Hutami-chou, Hyogo
Date of start of the outbreak 21/10/2013
Outbreak status Resolved (29/10/2013)
Epidemiological unit Farm
Water type Salt water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Scorpion fish (Inimicus japonicus) 1.9 % 1.9 % 20000 377 377 0 0
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Scorpion fish (Inimicus japonicus) 20000 377 377 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Scorpion fish (Inimicus japonicus) 1.89% 1.89% 100.00% 1.89%
*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 1. Regarding the number of animals in the outbreak, the number of cases is described as the same than the number of deaths due to the difficulty to be counted. 2. Red sea bream iridovirus occurred in Scorpion fish (juvenile) cultured in indoor pool. 3. The occurrence of red sea bream iridovirus has terminated with the declining of the seawater temperature. It has been of about 20 degrees at the culturing seawater. According to the Manual of Diagnostic Tests for Aquatic Animals (2013), outbreaks have been seen mostly in the summer season at water temperatures of 25C and above.
Control measures
Measures applied
  • Movement control inside the country
  • Traceability
  • Official disposal of carcasses, by-products and waste
  • Surveillance within containment and/or protection zone
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
National Research Institute of Aquaculture Fisheries Research Agency (OIE Reference Laboratory) Scorpion fish (Inimicus japonicus) polymerase chain reaction (PCR) 08/11/2013 Positive
Future Reporting
The event is resolved. No more reports will be submitted.
Map of outbreak locations