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Effectiveness of exclusion measures for preventing multi-host interaction at water sources under dry conditions

AuthorsBarasona, José A. ; Cristóbal, Ignacio ; Gortázar, Christian ; Vicente, Joaquín
Issue Date2012
Citation61st WDA/10th EWDA (2012)
AbstractTuberculosis (TB) is endemic in Eurasian wild boar (Sus scrofa) and red deer (Cervus elaphus) in south-central Spain and evidence suggests transmission to domestic cattle. Known risk factors for TB at the interface between livestock and wild ungulates include temporal and spatial overlap, particularly around waterholes during summer. We evaluated the effectiveness of selective exclusion measures for reducing direct and indirect contact between cattle and wild ungulates at waterholes. We first monitored 6 waterholes with infrared digital cameras at a TB positive farm to quantify interactions. We then assigned 3 waterholes to be “cattle only” and 3 to be “wildlife only”. Cattle only waterholes were surrounded with a wildlife-proof fence (2 m high) and a cattle-specific gate. Wildlife only waterholes were surrounded by a fence that wild ungulates could breach but cattle could not (1.2 m high). Deer and wild boar, respectively, easily jumped or undercrossed this fence. Cattle only fences were 100% effective at preventing wildlife access to waterholes. Wildlife only fences were 100% effective in preventing cattle access to waterholes and did not impede wildlife use. Many cows learned to operate the cattle-specific gate quickly and others followed and learned from them. Within 2 weeks 75.2% actively entered and exited through the cattle only gate. We demonstrate how simple, low-cost fencing strategies can serve as biosecurity measures to substantially reduce direct and indirect contact between cattle and wild ungulates, serving to reduce the potential for TB transmission.
DescriptionResumen del trabajo presentado a la 61st Wildlife Disease Association and 10th Biennial European Wildlife Disease Association: "convergence in wildlife health", celebrada en Lyon (Francia) del 23 al 27 de julio de 2012.-- et al.
Appears in Collections:(IREC) Comunicaciones congresos
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