Infectious myonecrosis,
Information received on 14/09/2018 from Dr Quaza Nizamuddin Bin Hassan Nizam, Director General of Veterinary Services, Department of veterinary services , Director General Office, Putrajaya, Malaysia
Report type Immediate notification (Final report)
Date of start of the event 04/06/2018
Date of confirmation of the event 07/06/2018
Report date 14/09/2018
Date submitted to OIE 14/09/2018
Date event resolved 30/06/2018
Reason for notification Recurrence of a listed disease
Date of previous occurrence 2014
Manifestation of disease Clinical disease
Causal agent Infectious myonecrosis virus
Nature of diagnosis Clinical, Laboratory (basic)
This event pertains to a defined zone within the country
New outbreaks (1)
Outbreak 1 (Prk.Bio(Joh) 1265/2(47)) Lot PT387, Sempang pantai, Merlimau, Melaka
Date of start of the outbreak 04/06/2018
Outbreak status Resolved (30/06/2018)
Epidemiological unit Farm
Water type Brackish water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Pacific White Shrimp (Penaeus vannamei) (t) 100 % 100 % 1 1 1 0 0
Affected population The outbreak happened inside a closed area. The mortality only happened on pond and no other suspected outbreak occurred in other pond. Controls of movement restrictions and then disposal was carried out. Furthermore, continuous observation was done.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Pacific White Shrimp (Penaeus vannamei) (t) 1 1 1 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Pacific White Shrimp (Penaeus vannamei) (t) 100.00% 100.00% 100.00% 100.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Control measures
Measures applied
  • Movement control inside the country
  • Surveillance outside infected and/or protection zone
  • Surveillance within infected and/or protection zone
  • Screening
  • Traceability
  • Quarantine
  • 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
Fisheries Biosecurity Laboratory Johor (National laboratory) Pacific White Shrimp (Penaeus vannamei) polymerase chain reaction (PCR) 07/06/2018 Positive
Future Reporting
The event is resolved. No more reports will be submitted.
Map of outbreak locations