Rift Valley fever,
South Africa
Information received on 25/05/2010 from Dr Bothle Michael Modisane, Chief Director , Department of Agriculture, Forestry and Fisheries, Animal Production and Health, PRETORIA, South Africa
Summary
Report type Follow-up report No. 10
Date of start of the event 19/01/2010
Date of pre-confirmation of the event 18/02/2010
Report date 25/05/2010
Date submitted to OIE 25/05/2010
Date event resolved 18/09/2010
Reason for notification Reoccurrence of a listed disease
Date of previous occurrence 01/01/2010
Manifestation of disease Clinical disease
Causal agent Rift Valley fever virus
Nature of diagnosis Clinical, Laboratory (advanced), Necropsy
This event pertains to the whole country
Related reports Immediate notification (19/02/2010)
Follow-up report No. 1 (03/03/2010)
Follow-up report No. 2 (10/03/2010)
Follow-up report No. 3 (24/03/2010)
Follow-up report No. 4 (29/03/2010)
Follow-up report No. 5 (01/04/2010)
Follow-up report No. 6 (20/04/2010)
Follow-up report No. 7 (28/04/2010)
Follow-up report No. 8 (06/05/2010)
Follow-up report No. 9 (18/05/2010)
Follow-up report No. 10 (25/05/2010)
Follow-up report No. 11 (01/06/2010)
Follow-up report No. 12 (11/06/2010)
Follow-up report No. 13 (24/06/2010)
Follow-up report No. 14 (08/07/2010)
Follow-up report No. 15 (30/07/2010)
Follow-up report No. 16 (09/09/2010)
Follow-up report No. 17 (29/11/2010)
New outbreaks (33)
Outbreak 1 (Rotterdam) Rotterdam, Ngwathe, FREE STATE
Date of start of the outbreak 04/02/2010
Outbreak status Resolved (25/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep 40 1 1 0 0
Outbreak 2 (Vrede) Vrede, Moqhaka, FREE STATE
Date of start of the outbreak 20/02/2010
Outbreak status Resolved (25/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep 1900 8 8 0 0
Outbreak 3 (Kalkfontein) Kalkfontein, Moqhaka, FREE STATE
Date of start of the outbreak 20/02/2010
Outbreak status Resolved (25/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep 420 5 2 0 0
Cattle 250 0 0 0 0
Outbreak 4 (Verdien) Verdien, Moqhaka, FREE STATE
Date of start of the outbreak 01/03/2010
Outbreak status Resolved (25/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 500 0 0 0 0
Sheep 1000 2 2 0 0
Outbreak 5 (Vlaklaagte Suid) Vlaklaagte Suid, Ngwathe, FREE STATE
Date of start of the outbreak 01/03/2010
Outbreak status Resolved (25/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep 235 2 2 0 0
Outbreak 6 (Vermont) Vermont, Mohakare, FREE STATE
Date of start of the outbreak 07/03/2010
Outbreak status Resolved (25/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 100 1 1 0 0
Sheep 2000 0 0 0 0
Outbreak 7 (Grasberg) Grasberg, Ubuntu, NORTHERN CAPE PROVINCE
Date of start of the outbreak 15/03/2010
Outbreak status Resolved (15/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep 249 6 6 0 0
Outbreak 8 (Kroonvlei) Kroonvlei, Moqhaka, FREE STATE
Date of start of the outbreak 15/03/2010
Outbreak status Resolved (25/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 250 0 0 0 0
Sheep 300 76 76 0 0
Outbreak 9 (Fontein) Fontein, Moqhaka, FREE STATE
Date of start of the outbreak 22/03/2010
Outbreak status Resolved (25/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 45 0 0 0 0
Sheep 400 20 20 0 0
Outbreak 10 (Asbosdam) Asbosdam, Letsemeng, FREE STATE
Date of start of the outbreak 23/03/2010
Outbreak status Resolved (25/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 78 0 0 0 0
Sheep 370 127 127 0 0
Outbreak 11 (Golden Valley) Golden Valley, Moqhaka, FREE STATE
Date of start of the outbreak 31/03/2010
Outbreak status Resolved (25/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep 350 2 1 0 0
Cattle 255 1 1 0 0
Outbreak 12 (Rietfontein) Rietfontein, Umsobomvu, NORTHERN CAPE PROVINCE
Date of start of the outbreak 05/04/2010
Outbreak status Resolved (15/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Goats 150 4 3 0 0
Outbreak 13 (Adamsfontein) Adamsfontein, Umsobomvu, NORTHERN CAPE PROVINCE
Date of start of the outbreak 05/04/2010
Outbreak status Resolved (15/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep 130 2 2 0 0
Outbreak 14 (Tweefontein FS) Tweefontein FS, Kopanong, FREE STATE
Date of start of the outbreak 10/04/2010
Outbreak status Resolved (25/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep 1000 25 25 0 0
Outbreak 15 (Komnader) Komnader, Siyancuma, NORTHERN CAPE PROVINCE
Date of start of the outbreak 15/04/2010
Outbreak status Resolved (15/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 31 0 0 0 0
Sheep 100 5 5 0 0
Outbreak 16 (Johannasrus) Johannasrus, Metsimaholo, FREE STATE
Date of start of the outbreak 19/04/2010
Outbreak status Resolved (25/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 62 0 0 0 0
Goats 200 3 0 0 0
Outbreak 17 (Dronfield) Dronfield, Sol Plaatjie, NORTHERN CAPE PROVINCE
Date of start of the outbreak 23/04/2010
Outbreak status Resolved (15/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Buffaloes 76 2 2 0 0
Outbreak 18 (Fairview) Fairview, Moqhaka, FREE STATE
Date of start of the outbreak 23/04/2010
Outbreak status Resolved (25/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 170 0 0 0 0
Sheep 200 1 0 0 0
Outbreak 19 (Vryheids Trust) Vryheids Trust, Siyancuma, NORTHERN CAPE PROVINCE
Date of start of the outbreak 25/04/2010
Outbreak status Resolved (15/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 31 2 2 0 0
Camelidae 4 0 0 0 0
Sheep 33 1 1 0 0
Outbreak 20 (Wegdraai) Wegdraai, Kheis, NORTHERN CAPE PROVINCE
Date of start of the outbreak 27/04/2010
Outbreak status Resolved (15/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Goats 200 5 1 0 0
Outbreak 21 (Langverwacht) Langverwacht, Kai Garib, NORTHERN CAPE PROVINCE
Date of start of the outbreak 28/04/2010
Outbreak status Resolved (15/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep / goats 500 5 0 0 0
Outbreak 22 (Irene) Irene, Siyancuma, NORTHERN CAPE PROVINCE
Date of start of the outbreak 02/05/2010
Outbreak status Resolved (15/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 25 0 0 0 0
Wild species 613 4 4 0 0
Affected population Deaths occurred in Ibex, an exotic species in South Africa (Capra spp)
Outbreak 23 (Badenhorstfontein) Badenhorstfontein, Siyancuma, NORTHERN CAPE PROVINCE
Date of start of the outbreak 03/05/2010
Outbreak status Resolved (15/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep 280 12 12 0 0
Outbreak 24 (Oumurasie) Oumurasie, Kheis, NORTHERN CAPE PROVINCE
Date of start of the outbreak 03/05/2010
Outbreak status Resolved (15/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep 300 10 10 0 0
Outbreak 25 (Tweebuffels) Tweebuffels, Ditsobotla, NORTH WEST PROVINCE
Date of start of the outbreak 05/05/2010
Outbreak status Resolved (15/06/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 25 0 0 0 0
Sheep 450 73 73 0 0
Affected population Deaths occurred in young lambs up to 3 weeks old
Outbreak 26 (Schoonfontein) Schoonfontein, Koukamma, EASTERN CAPE PROVINCE
Date of start of the outbreak 06/05/2010
Outbreak status Resolved (12/07/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 8000 1 1 0 0
Outbreak 27 (Vlagfontein) Vlagfontein, Beaufort West, WESTERN CAPE PROVINCE
Date of start of the outbreak 06/05/2010
Outbreak status Resolved (06/06/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 800 0 0 0 0
Sheep 900 1 1 0 0
Outbreak 28 (Bulwater) Bulwater, Beaufort West, WESTERN CAPE PROVINCE
Date of start of the outbreak 06/05/2010
Outbreak status Resolved (06/06/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep 300 12 5 0 0
Outbreak 29 (Melkhout) Melkhout, Swellendam, WESTERN CAPE PROVINCE
Date of start of the outbreak 06/05/2010
Outbreak status Resolved (06/06/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 400 36 36 0 0
Affected population Deaths only seen in older cows, not in heifers, calves or young cows.
Outbreak 30 (Doornhoek) Doornhoek, Ditsobotla, NORTH WEST PROVINCE
Date of start of the outbreak 07/05/2010
Outbreak status Resolved (15/06/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 2 2 0 0
Outbreak 31 (Pypfontein) Pypfontein, Murraysburg, WESTERN CAPE PROVINCE
Date of start of the outbreak 07/05/2010
Outbreak status Resolved (07/06/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep 200 20 20 0 0
Outbreak 32 (Mackay Estates) Mackay Estates, Midvaal, GAUTENG
Date of start of the outbreak 13/05/2010
Outbreak status Resolved (13/05/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep 20 3 0 0 0
Outbreak 33 (Kwaggavlakte) Kwaggavlakte, Thabazimbi, LIMPOPO
Date of start of the outbreak 14/05/2010
Outbreak status Resolved (14/06/2010)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Cattle 2 0 0 0 0
Sheep 28 1 1 0 0
Summary of outbreaks Total outbreaks: 33
Total animals affected
Species Susceptible Cases Deaths Destroyed Slaughtered
Sheep 11205 415 400 0 0
Cattle 11024 43 43 0 0
Goats 550 12 4 0 0
Buffaloes 76 2 2 0 0
Camelidae 4 0 0 0 0
Sheep / goats 500 5 0 0 0
Wild species 613 4 4 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Sheep 3.70% 3.57% 96.39% 3.57%
Cattle ** ** 100.00% **
Goats 2.18% 0.73% 33.33% 0.73%
Buffaloes 2.63% 2.63% 100.00% 2.63%
Camelidae 0.00% 0.00% - 0.00%
Sheep / goats 1.00% 0.00% 0.00% 0.00%
Wild species 0.65% 0.65% 100.00% 0.65%
*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
  • Vectors
Epidemiological comments The number of new outbreaks has decreased dramatically as winter is approaching and temperatures are falling.
Control measures
Measures applied
  • No vaccination
  • 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