Excerpt of product info
|Product title :||
Chronic wasting disease in deer and elk in North America
|Author(s) :||E.S. Williams & M.W. Miller|
Chronic wasting disease (CWD) has emerged as an important disease of wildlife in North America. The disease is a unique member of the transmissible spongiform encephalopathies (TSEs) or prion diseases, which naturally affect only a few species. Of the TSEs, CWD is the only one found in free-ranging species. However, interest in CWD has recently grown, by association with the better-known TSEs such as variant Creutzfeldt-Jakob disease of humans and bovine spongiform encephalopathy. Knowledge of the geographic distribution of CWD, though still limited, has greatly improved since the mid-1990s as a result of surveillance in free-ranging deer and elk and in commercially owned Rocky Mountain elk (Cervus elaphus nelsoni), and the disease has now been found in multiple areas of the plains and Rocky Mountain foothills of western North America. Studies of the biology and natural history of CWD over recent years have resulted in a better understanding of the pathogenesis and epidemiology of the disease. Early involvement of the lymphoid tissues of the alimentary tract during the incubation period of CWD suggests plausible routes for agent exit from an infected individual, such as in faeces or saliva.