Chronic Wasting Disease — United States
Environmental transmission of the CWD agent was reported in studies demonstrating that an infected deer carcass left in a pasture for 2 years could transmit the agent to immunologically naive deer (17). Exposure of naive deer to pasture previously inhabited by an infected deer also led to CWD transmission, as did cohabitation of naive and infected deer (17). Naive deer exposed to water, feed buckets, and bedding used by CWD-infected deer contracted the disease (18).
Epidemiologic modeling
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