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Abstract
A serological survey was conducted in apparently healthy, unvaccinated indigenous Tswana goats and sheep in Kasane, Maun and Shakawe districts in northwestern Botswana in order to determine in these animals, the levels of exposure to the South African Territories (SAT) serotypes: SAT 1, SAT 2 and SAT 3 of foot-and-mouth disease virus (FMDV). A total of 250, 142 and 134 goat sera originating respectively from Kasane, Maun and Shakawe districts were tested for FMDV antibodies against the three SAT serotypes by the liquid phase blocking enzyme-linked immunosorbent assay and 26 of 250 (10.4%), 5 of 142 (3.5%) and 18 of 134 (13.4%) were positive either to SAT 1 or SAT 3, or to both serotypes. None of the goats' sera was positive to SAT 2 serotype. All sheep sera (n = 9) tested negative against all three serotypes of the virus. The findings are discussed in relation to results of other serological surveys carried out elsewhere.
Highlights
Several free-living game animal species, the African buffalo, Syncerus caffer, are important reservoirs of foot-and-mouth disease virus (FMDV) for livestock in southern Africa (Bengis, Thomson, Hedger, De Vos & Pini 1986)
The study reported here was carried out in order to determine the level of exposure of Tswana goats and sheep to the South African Territories (SAT) serotypes of FMDV in northwestern Botswana with the ultimate goal of highlighting the epidemiological roles that these animals might play in the transmission of the disease to cattle
The occurrence of buffaloes in the northwestern districts of Botswana poses a constant threat of infection with FMDV to cattle, goats and sheep
Summary
Several free-living game animal species, the African buffalo, Syncerus caffer, are important reservoirs of foot-and-mouth disease virus (FMDV) for livestock in southern Africa (Bengis, Thomson, Hedger, De Vos & Pini 1986). Some of these species occur in large numbers in Botswana, especially along the Chobe River, the Okavango Delta and, as such, the two areas are recognized as the main foot-andmouth disease high-risk zones in the country. The study reported here was carried out in order to determine the level of exposure of Tswana goats and sheep to the South African Territories (SAT) serotypes of FMDV in northwestern Botswana with the ultimate goal of highlighting the epidemiological roles that these animals might play in the transmission of the disease to cattle
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