Tilapia Lake Virus,
Philippines
Information received on 22/07/2019 from Dr Enrico Garzon, Assistant Secretary for Livestock, Bureau of Animal Industry, Department of Agriculture, Quezon City, Philippines
Summary
Report type Immediate notification (Final report)
Date of start of the event 14/03/2018
Date of confirmation of the event 14/03/2018
Report date 22/07/2019
Date submitted to OIE 22/07/2019
Date event resolved 01/10/2018
Reason for notification Emerging disease
Morbidity 1 (scale 0 to 5)
Mortality 0 (scale 0 to 5)
Zoonotic impact No
Causal agent Tilapia lake virus
New outbreaks (3)
Outbreak 1 (San Luis, Pampanga) San Luis, San Luis, Pampanga
Date of start of the outbreak 14/03/2018
Outbreak status Resolved (03/07/2018)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Tilapia (Oreochromis niloticus) 1 (scale 0 to 5) 0 (scale 0 to 5)
Outbreak 2 (Guagua, Pampanga) Guagua, Guagua, Pampanga
Date of start of the outbreak 15/03/2018
Outbreak status Resolved (31/05/2018)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Tilapia (Oreochromis niloticus) 1 (scale 0 to 5) 0 (scale 0 to 5)
Outbreak 3 (Tanauan, Batangas) Sampaloc, Tanauan, Batangas, Tanauan, Batangas
Date of start of the outbreak 26/09/2018
Outbreak status Resolved (01/10/2018)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-open
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Tilapia (Oreochromis niloticus) 1 (scale 0 to 5) 1 (scale 0 to 5)
Summary of outbreaks Total outbreaks: 3
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Tilapia (Oreochromis niloticus) **
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Tilapia (Oreochromis niloticus) ** ** ** **
*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
  • Unknown or inconclusive
Epidemiological comments 1. SAN LUIS, PAMPANGA - Tilapia fingerlings were monitored for RSIV and TiLV using PCR. The results were positive for TiLV. Neither mortality nor clinical signs were osberved on the farm. The population was retested and showed negative results. No control measures were applied. 2. GUAGUA, PAMPANGA - Tilapia grow-out were monitored for RSIV and TiLV using PCR. The results were positive for TiLV. Neither mortality nor clinical signs were osberved on the farm. The population was retested and showed negative results. No control measures were applied. 3. TANAUAN, BATANGAS - Tilapia grow-out were monitored for bacterial infection, parasitic and viral infection (Irido, VNN, and TiLV). Clinical signs were exhibited such as bulging of eyes, distended abdomen and erratic swimming. The population was harvested for consumption. No reports of mortality were noted after restocking.
Control measures
Measures applied
  • 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 Fisheries Laboratory Division (National laboratory) Tilapia (Oreochromis niloticus) polymerase chain reaction (PCR) 14/03/2018 Positive
National Fisheries Laboratory Division (National laboratory) Tilapia (Oreochromis niloticus) polymerase chain reaction (PCR) 15/03/2018 Positive
National Fisheries Laboratory Division (National laboratory) Tilapia (Oreochromis niloticus) polymerase chain reaction (PCR) 26/09/2018 Positive
Future Reporting
The event is resolved. No more reports will be submitted.
Map of outbreak locations