Red sea bream iridoviral disease,
United States of America
Information received on 15/05/2019 from Dr Jack Shere, Deputy Administrator Chief Veterinary Office r, USDA-APHISVeterinary Services, USA United States Department of Agriculture, WASHINGTON, United States of America
Summary
Report type Immediate notification (Final report)
Date of start of the event 01/12/2018
Date of confirmation of the event 28/04/2019
Report date 14/05/2019
Date submitted to OIE 15/05/2019
Date event resolved 19/04/2019
Reason for notification Listed disease in a new host species
Causal agent Red sea bream iridovirus
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
New outbreaks (2)
Outbreak 1 ( Clownfish) Greene County, Greene, Missouri
Date of start of the outbreak 01/12/2018
Outbreak status Resolved (19/04/2019)
Epidemiological unit Other
Water type Salt water
Population type Wild
Production system Closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
common clownfish (Amphiprion perideraion) 50 % 50 % 150 75 75 0
common clownfish (Amphiprion ocellaris) 50 % 50 % 150 75 75 0
Affected population Imported fish confined to an aquarium.
Outbreak 2 ( Lionfish) Greene County, Greene, Missouri
Date of start of the outbreak 01/04/2019
Outbreak status Resolved (19/04/2019)
Epidemiological unit Other
Water type Salt water
Population type Wild
Production system Closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
lionfish (Pterosis volitans) 1 (scale 0 to 5) 0 (scale 0 to 5) 23 23 0
Affected population Fish confined to an aquarium. No clinical signs of disease observed.
Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
common clownfish (Amphiprion perideraion) 150 ** 75 75 0
common clownfish (Amphiprion ocellaris) 150 ** 75 75 0
lionfish (Pterosis volitans) 23 ** 23 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
common clownfish (Amphiprion perideraion) ** 50.00% ** 100.00%
common clownfish (Amphiprion ocellaris) ** 50.00% ** 100.00%
lionfish (Pterosis volitans) ** ** ** **
*Removed from the susceptible population through death, destruction and/or slaughter
**Not calculated because of missing information
Epidemiology
Source of the outbreak(s) or origin of infection
  • Introduction of new live animals
Epidemiological comments The USDA APHIS National Veterinary Services Laboratories (NVSL) confirmed red sea bream iridovirus (RSIV) in imported ornamental fish (common clownfish or Amphirprion ocellaris) that were confined to an aquarium. The clownfish started showing clinical signs of disease during the quarantine period after arrival at the aquarium. Lionfish (Pterosis volitans) that shared the same water at the aquarium with the imported clownfish were also found to be infected with RSIV. The infected fish were never released and were always under containment until euthanized.
Control measures
Measures applied
  • Official disposal of carcasses, by-products and waste
  • Stamping out
  • Disinfection
  • Vaccination permitted (if a vaccine exists)
  • 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 Veterinary Services Laboratories (National laboratory) common clownfish (Amphiprion ocellaris) histopathological examination 23/04/2019 Positive
National Veterinary Services Laboratories (National laboratory) common clownfish (Amphirprion ocellaris) nucleotide sequencing 28/04/2019 Positive
National Veterinary Services Laboratories (National laboratory) common clownfish (Amphiprion perideraion) histopathological examination 23/04/2019 Positive
National Veterinary Services Laboratories (National laboratory) common clownfish (Amphiprion perideraion) nucleotide sequencing 28/04/2019 Positive
National Veterinary Services Laboratories (National laboratory) common clownfish (Amphiprion perideraion) polymerase chain reaction (PCR) 19/04/2019 Positive
National Veterinary Services Laboratories (National laboratory) lionfish (Pterosis volitans) histopathological examination 23/04/2019 Positive
National Veterinary Services Laboratories (National laboratory) lionfish (Pterosis volitans) nucleotide sequencing 28/04/2019 Positive
National Veterinary Services Laboratories (National laboratory) lionfish (Pterosis volitans) polymerase chain reaction (PCR) 19/04/2019 Positive
National Veterinary Services Laboratories (National laboratory) common clownfish (Amphirprion ocellaris) polymerase chain reaction (PCR) 19/04/2019 Positive
Private laboratory (Private Laboratory) common clownfish (Amphiprion ocellaris) histopathological examination 15/04/2019 Positive
Private laboratory (Private Laboratory) common clownfish (Amphiprion perideraion) histopathological examination 15/04/2019 Positive
Private laboratory (Private Laboratory) lionfish (Pterosis volitans) histopathological examination 14/05/2019 Positive
Future Reporting
The event is resolved. No more reports will be submitted.
Map of outbreak locations