How is scrapies primarily characterized in terms of its impact on affected animals?

Scrapie is primarily characterized by its significant impact on the central nervous system of affected animals, particularly sheep and goats. This disease is a type of transmissible spongiform encephalopathy, which leads to neurodegeneration. The infection causes a range of neurological symptoms, such as ataxia (loss of coordination), tremors, and changes in behavior. Over time, the disease progresses, leading to severe deterioration of brain function. It is crucial for individuals involved in animal science and veterinary medicine to recognize these neurological signs as they are key indicators of scrapie.

While the other options may suggest possible complications or associate with other animal health issues, they do not directly relate to the hallmark features of scrapie. For instance, digestive issues are not a primary concern with this condition, nor are skin infections or reproductive failures. Understanding that scrapie is fundamentally a neurological disease helps in proper diagnosis and management of affected flocks.