CWD Not Found in Deer Samples
Samples taken from more than 500 hunter-killed Pennsylvania white-tailed deer during the 2002 two-week concurrent rifle deer season have all tested negative for chronic wasting disease, according to representatives of the Pennsylvania Game Commission and state Department of Agriculture.
These tests were conducted by the Department of Agriculture's State Veterinary Laboratory in Harrisburg.
The Game Commission continues to wait for CWD test results from the samples collected from the 61 hunter-killed elk that were collected during the week-long elk hunt in November. According to Penn State University Animal Diagnostics Laboratory, results of the brucellosis and bovine tuberculosis tests for the elk were negative, however, the CWD tests are not yet complete. Testing of the elk samples is being conducted by the National Veterinary Services Laboratory in Ames, Iowa.
While the long anticipated test results were good news, the Game Commission will continue to monitor and collect deer and elk that appear sick or behave abnormally. Plans are in place to continue random testing of hunter-killed deer, as well as all hunter-killed elk, during the 2003-2004 seasons.
"Although CWD has not been found in Pennsylvania, we must continue to be vigilant in our CWD monitoring efforts," said Vern Ross, Game Commission executive director. "The surveillance information we are gathering is important for the early detection of CWD.
"At this time, we can continue to assure the public that there are no confirmed or suspected cases of CWD-infected deer in Pennsylvania, and we are doing everything we can to ensure that it stays that way."
Since 1998, the Game Commission, in cooperation with the state Department of Agriculture, has tested more than 300 deer that have died of unknown illness or were exhibiting abnormal behavior. No evidence of CWD has been found in these samples.
First identified in 1967, CWD is a transmissible spongiform encephalopathy (TSE) that affects members of the deer family (cervids), including white-tailed deer and elk. It is a progressive and always fatal disease, which scientists theorize is caused by an unknown agent capable of transforming normal brain proteins into an abnormal form. Once the abnormal form is created, it changes the shape of adjacent proteins and causes holes to form in brain tissue.
There currently is no practical way to test live animals for CWD, no cure for animals that contact the disease and no vaccine to prevent an animal from contracting the disease. Clinical signs include poor posture, lowered head and ears, uncoordinated movement, rough-hair coat, decreased appetite, weight loss, increased thirst, excessive drooling, and, ultimately, death. There is no scientific evidence of CWD being transmitted to humans or to other non-cervid livestock under normal conditions.
Deer or elk harboring CWD may not show any signs of the disease for a minimum of 18 months, and then death follows normally within the next year.
Anyone who sees deer or elk behaving oddly, that appear to be very sick, or that are dying for unknown reasons are urged to contact the nearest Game Commission Region Office. Individuals are not to kill the animal.