Signs & Symptoms of Chronic Wasting Disease

Chronic Wasting Disease is a non-curable, transmissible disease that affects elk and deer in North America. This disorder causes deterioration of the brain and is symptomatically similar to scrapie (sheep) and mad cow disease (Bovine Spongiform Encephalopathy). CWD is a fatal condition, thought to be caused by infectious proteins known as prions. Because this severe illness can be spread, it is important to understand the signs and symptoms in order to protect the uninfected population.

Abnormal Behavior

• As prions accumulate in the brain, the result is an accumulation of lesions in the affected area. When the animal's brain begins to deteriorate, notable changes in behavior can be observed. Most often, the infected animal will separate itself from the herd. It will show little to no interest in observing humans that are in the area and almost certainly display a lack of coordination.

Increased Thirst

• Deer and elk afflicted with CWD will begin to display signs of excessive thirst. Whenever possible, they will stick close to areas where water sources are readily available. Along with this increased thirst and water consumption comes excessive urination.

Emaciation

• While a neuroligical condition, CWD causes drastic changes throughout the muscular system. Affected animals will become emaciated, losing a significant amount of body weight and developing an overall poor condition. Infected deer and elk will also experience muscular tremors throughout the entire body.

Increased Salivation

• As the disease progresses to a clinical stage, many infected animals will begin to drool excessively. This is often accompanied by difficulty with chewing and/or swallowing food.