Crucially, Bluetongue is a vector-borne disease and is not transmitted through direct animal contact. The disease relies on the biting midge (Culicoides species) for transmission, particularly when climatic conditions favor midge proliferation. This dependency on the vector means that disease management is intrinsically linked to insect control protocols and environmental monitoring, requiring a shift in traditional biosecurity protocols focused on direct animal interactions.

Clinical presentation varies significantly between species. In sheep, BTV often causes severe, acute symptoms characterized by high fever, oral and nasal lesions, and, notably, a blue discoloration of the tongue, frequently leading to high mortality rates. In contrast, affected cattle often exhibit mild or sub-clinical signs, but they remain a vital component of the disease epidemiology as they can maintain the virus in the environment without showing clear distress, complicating dairy farm management.

To safeguard the dairy industry and maintain trade integrity, regulatory bodies enforce strict control measures, including movement restrictions on susceptible animals and rigorous vaccination programs. The implementation of effective, region-specific BTV vaccines is a critical preventive tool. These coordinated efforts are necessary to prevent the uncontrolled spread of the virus, which could severely disrupt agribusiness operations and the flow of animal products across borders.