If you're a hunter or eat wild-caught game (deer, elk, moose, reindeer), then you should be concerned with chronic wasting disease (CWD). Chronic wasting disease is an always-fatal prion disease similar to "mad-cow disease" (bovine spongiform encephalopathy) in cattle.
In chronic wasting disease there is a long incubation period, followed by the brain become progressively like a sponge - riddled with holes, along with deterioration in brain function, behavioral changes, and eventually death. A horrible slow death. There are no treatments or vaccines.
It turns out that chronic wasting disease is slowly spreading and infecting wild game across the United States (26 states) and 3 Canadian provinces. [Also detected in Finland, Norway, South Korea, and Sweden.] The concern is that this disease will jump to humans, especially in people who eat contaminated meat.
A research center monitoring the situation and publishing information and research on its site is CIDRAP (Center for Infectious Disease and Policy). Make sure to look at the Tweets (Twitter).
One scary thing about CWD is that once it gets into the soil, it stays there for years, and high heat, disinfectants, and radiation don't kill it. Yikes! Dr.Zabel at the Colorado State Univ. Prion Research Center suggested a few years ago that controlled burns (fires) of infected fields or areas could eliminate the prions left behind by infected animals (from animal mucus/saliva, urine, and feces, and decaying carcasses) on plants and soil.
An article with advice for how hunters can protect themselves, and a map of where CWD is found in the US.: 5 Ways Hunters Can Prevent Spreading Chronic Wasting Disease
Here is some of what CIDRAP says on their site about CWD:
Chronic wasting disease (CWD) is a prion disease that affects several cervid species: deer, elk, reindeer, sika deer, and moose. CWD was first identified in 1967 in a captive mule deer living in a Colorado research facility. In 1981, CWD was detected for the first time in a wild cervid. Since these initial detections, CWD has been identified in 26 states and three Canadian provinces. It has also been detected in Finland, Norway, South Korea, and Sweden. ...continue reading "Chronic Wasting Disease Is Spreading In the United States"