慢性消耗病（英语：chronic wasting disease，缩写为CWD），又称鹿慢性消耗病、狂鹿症，一种发生在鹿科动物的传染病。是传染性海绵状脑病的一种，由变性普利昂子引起，会引起中枢神经系统逐渐退化，最终造成脑部组织空洞化。

目前为止，这种疾病仅见于北美洲的鹿科动物，黑尾鹿（Mule deer）、白尾鹿（ White-tailed deer）及落矶山麋鹿（ Rocky Mountain elk）与驼鹿等。1967年，在美国科罗拉多州一项针对北美黑尾鹿（Mule deer）的野外研究中，它首次被报导。1978年，证实它是一种传染性海绵状脑病，并且它已经散播到北美十个州以及加拿大。

Chronic wasting disease (CWD) is a transmissible spongiform encephalopathy (TSE) of mule deer, white-tailed deer, elk (or "wapiti"), and moose ("elk" in Europe). To date, CWD has only been found in members of the deer family. First recognized as a clinical "wasting" syndrome in 1967 in mule deer in a wildlife research facility in northern Colorado, USA, it was identified as a TSE in 1978 and has spread to free-ranging and captive populations in 23 US states and two Canadian provinces. CWD is typified by chronic weight loss leading to death. No relationship is known between CWD and any other TSE of animals or people.