ABSTRACT We report the first detection of chronic wasting disease (CWD) in Sweden, in three old female moose ( Alces alces ). Prions (PrP CWD ) were detected in brain but not in lymph nodes. The findings are similar to previously described CWD cases in old moose in Norway, where a spontaneous origin is hypothesized.

Chronic wasting disease (CWD) is a fatal contagious prion disease naturally occurring in cervids in North America. In 2016, CWD was detected in wild reindeer ( Rangifer tarandus ) and moose ( Alces alces ) in Norway. Here, we report the first known naturally infected wild Norwegian red deer ( Cervus elaphus ).