CWD sampling.jpg

CWD Sampling Staff Image
Pictured, MDC staff collect lymph nodes from a harvested buck for CWD testing during MDC’s mandatory sampling effort during the opening weekend of the fall firearms deer season. MDC has found 28 new cases of CWD from 11 counties and is now focusing on reducing the spread of the disease from those areas.
MDC

MDC test results reveal more deer with deadly CWD

News from the region

Statewide
Jan 17, 2019

JEFFERSON CITY, Mo. – The Missouri Department of Conservation (MDC) reports 28 more deer from 11 Missouri counties have been found to have chronic wasting disease (CWD). This brings the number of cases of the deadly deer disease in Missouri to 103 since 2012.

CWD is a deadly illness in white-tailed deer and other members of the deer family, called cervids. CWD is spread from deer to deer through direct contact and through contact with soil, food, and water that have been contaminated through feces, urine, saliva, or carcasses of infected deer. CWD kills all deer and other cervids it infects. Learn more at mdc.mo.gov/cwd.

The CWD-positive deer were from the following counties: Adair (2), Crawford (1), Franklin (5), Jefferson (1), Linn (2), Macon (4), Mercer (1), Oregon (3), Ste Genevieve (7), Stone (1), and Taney (1).

The results come after MDC collected tissue samples for CWD testing from more than 28,000 deer over this past summer and throughout the fall deer-hunting season. That number includes more than 20,000 tissue samples collected during MDC’s “mandatory CWD sampling” during the opening weekend of the fall firearms deer season. During the weekend, MDC staff collected tissue samples from deer harvested by hunters in 31 counties in or near where the disease has already been found. The number also includes more than 8,000 tissue samples collected from hunter-harvested deer through MDC’s statewide voluntary CWD-sampling efforts during the past deer season, road-killed deer, and “sick-looking” deer reported to MDC. 

“Eight of the CWD detections were from hunter-harvested deer sampled by taxidermists or meat processors, who are all very important partners in helping us find cases of CWD,” said MDC Wildlife Disease Coordinator Jasmine Batten. “Of the remaining 20 positives, 15 were from hunter-harvested deer sampled at our mandatory sampling stations, four were from hunter-harvested deer sampled by MDC staff outside of opening weekend through our voluntary sampling program, and one was from a found dead deer.”

Batten added that CWD was detected in four new areas of the state this season:

  • Southwest Missouri in northeast Stone County near Reeds Spring;
  • Southwest Missouri in southern Taney County on Drury-Mincy Conservation Area;
  • Southeast Missouri in west-central Oregon County near Alton; and
  • North- Central Missouri in Mercer County north of Mercer approximately two miles from the Iowa border.

MDC noted that hundreds of cases of CWD have been found in northwest Arkansas bordering southern Missouri, and CWD has also been found in Wayne County, Iowa, which borders northern Missouri.

“In the new areas, the number of CWD positives is low, indicating the disease was likely recently introduced in those locations,” explained Batten. “Overall, where CWD occurs throughout the state, the number of infected deer also remains low, which indicates that CWD is relatively rare in the state – and we want to keep it that way. If left unchecked, CWD could dramatically decrease the overall health and number of deer in Missouri over time.”

MDC has tested nearly 130,000 deer for CWD since it began its efforts in 2001. For the most current CWD numbers and more information, visit the MDC website at mdc.mo.gov/cwd under “CWD in Missouri.”

Next Steps – Managing CWD Through Targeted Culling

MDC is now focusing on managing CWD in the immediate areas where new and recent cases of the disease have been found. MDC staff are again working with landowners on a voluntary basis through mid-March in the immediate areas (approximately 1-2 square miles) around where recent cases of CWD have been found to harvest and test additional deer for the disease.

“Post-season targeted culling is a proven method of slowing the growth of CWD in a local deer population and, as a result, minimizing the accumulation of CWD in the local environment,” said Batten.

She added that MDC is modeling this management approach after similar effective efforts in Illinois.

“Illinois is showing success in stabilizing CWD prevalence through targeted culling and reports a steady 1% prevalence statewide over time,” Batten said. “In contrast, since stopping its targeted-culling management efforts in 2007, the state of Wisconsin continues to see a steady increase in CWD prevalence. Some local areas of southwest Wisconsin are seeing over 50% of adult bucks with the disease.”

MDC staff and participating landowners have taken a total of about 4,600 deer through targeted culling since the Department began the effort several years ago. Post-season targeted culling accounts for just approximately 4% of all CWD samples MDC has collected so far but has resulted in finding almost half of all CWD cases in Missouri.

Batten added that deer harvested through targeted culling that do not test positive for CWD are offered to the participating landowners or donated to the Share the Harvest Program for local food banks and food pantries. Deer that test positive for CWD are properly disposed of by MDC staff or meat processors.

Learn more about MDC’s efforts at mdc.mo.gov/cwd under “Post-Season Targeted Culling.” 

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