Epizootic ulcerative syndrome,
Malawi
Information received on 26/08/2020 from Dr Patrick Chikungwa, Director of Department of Animal Health and Livestock Development, Department of Animal Health and Livestock Development, Ministry of Agriculture, Irrigation an Water Development, LILONGWE, Malawi
Summary
Report type Follow-up report No. 3
Date of start of the event 16/06/2020
Date of confirmation of the event 17/07/2020
Report date 26/08/2020
Date submitted to OIE 26/08/2020
Reason for notification First occurrence of a listed disease in the country
Causal agent Aphanomyces invadans
Nature of diagnosis Clinical, Laboratory (basic), Necropsy
This event pertains to a defined zone within the country
Related reports Immediate notification (24/07/2020)
Follow-up report No. 1 (04/08/2020)
Follow-up report No. 2 (11/08/2020)
Follow-up report No. 3 (26/08/2020)
Follow-up report No. 4 (21/09/2020)
New outbreaks (3)
Outbreak 1 Chitete dam, Chipala EPA, Kasungu, Central
Date of start of the outbreak 17/06/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Reservoir
Water type Fresh water
Population type Wild
Production system Open
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Cat fish (Clarias gariepinus) (kg) 1 (scale 0 to 5) 1 (scale 0 to 5) 1000 3 3 0 0
Affected population this is a reservoir dam with its rivers originating in the hills close to Mchinji distrit where the disease was first reported
Outbreak 2 Chipera village, Muwanga section, Lilongwe, Central
Date of start of the outbreak 25/06/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit River system
Water type Fresh water
Population type Wild
Production system Open
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Cat fish (Clarias gariepinus) (kg) 2 (scale 0 to 5) 2 (scale 0 to 5) 1000 3 3 0 0
Affected population this is a river which passes on the borders of the two district of Lilongwe and Mchinji and it joins the river Bua.
Outbreak 3 Kauma village, Mulomo section, Ntchisi, Central
Date of start of the outbreak 19/08/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit River system
Water type Fresh water
Population type Wild
Production system Open
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Cat fish (Clarias gariepinus) (kg) 1 (scale 0 to 5) 1 (scale 0 to 5) 500 2 2 0 0
Affected population this is the river Bua which run from Mchinji, Lilongwe and Ntchisi
Summary of outbreaks Total outbreaks: 3
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cat fish (Clarias gariepinus) (kg) 2500 8 8 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Cat fish (Clarias gariepinus) (kg) 0.32% 0.32% 100.00% 0.32%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Horizontal spread through water
Control measures
Measures applied
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • No other measures
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations