Each year, MDC conducts CWD testing throughout the state. CWD testing has two main goals: 1) detect the disease as early as possible in new locations, and 2) monitor changes in disease occurrence over time.
Select taxidermists and meat processors throughout the state partner with MDC and collect CWD samples from hunter-harvested deer. In addition to samples collected by cooperating taxidermists and meat processors, mandatory sampling occurs within select CWD Management Zone counties. Mandatory sampling results in an efficient use of resources, allowing approximately 20,000 samples to be collected during a two-day period.
2024-25 Sampling Results to Date
The table below shows MDC sampling efforts and test results so far for the current sampling season (July 1, 2024, through June 30, 2025). These numbers are subject to frequent change.
CWD Cases Found in Free-Ranging Deer Through May 22, 2024
This table shows the total number of CWD cases found in Missouri free-ranging deer by county through May 22, 2024. Positives for the current surveillance season are not included in this table.
| County | Region | Year of 1st Positive | Pre-2023 Positives | 2023 Positives | Total Positives |
|---|---|---|---|---|---|
| Adair | NE | 2014-2015 | 26 | 3 | 29 |
| Barry | SW | 2021-2022 | 5 | 1 | 6 |
| Barton | SW | 2022-2023 | 9 | 15 | 24 |
| Carroll | NW | 2022-2023 | 1 | 2 | 3 |
| Cedar | SW | 2017-2018 | 4 | 0 | 4 |
| Chariton | NW | 2023-2024 | 0 | 4 | 4 |
| Christian | SW | 2021-2022 | 2 | 0 | 2 |
| Clark | NE | 2023-2024 | 0 | 1 | 1 |
| Cole | CEN | 2014-2015 | 1 | 0 | 1 |
| Crawford | STL | 2018-2019 | 3 | 3 | 6 |
| Dallas | SW | 2022-2023 | 1 | 4 | 5 |
| Franklin | STL | 2015-2016 | 52 | 23 | 75 |
| Gasconade | CEN | 2022-2023 | 1 | 0 | 1 |
| Grundy | NW | 2023-2024 | 0 | 1 | 1 |
| Hickory | SW | 2022-2023 | 1 | 0 | 1 |
| Howell | OZ | 2021-2022 | 1 | 0 | 1 |
| Jasper | SW | 2023-2024 | 0 | 1 | 1 |
| Jefferson | STL | 2016-2017 | 28 | 15 | 43 |
| Linn | NW | 2015-2016 | 52 | 9 | 61 |
| Livingston | NW | 2022-2023 | 1 | 0 | 1 |
| Macon | NE | 2011-2012 | 70 | 7 | 77 |
| Maries | CEN | 2023-2024 | 0 | 1 | 1 |
| Mercer | NW | 2018-2019 | 1 | 0 | 1 |
| Oregon | OZ | 2018-2019 | 16 | 4 | 20 |
| Osage | CEN | 2023-2024 | 0 | 3 | 3 |
| Perry | SE | 2017-2018 | 9 | 3 | 12 |
| Polk | SW | 2017-2018 | 8 | 2 | 10 |
| Pulaski | OZ | 2020-2021 | 2 | 1 | 3 |
| Putnam | NE | 2020-2021 | 6 | 3 | 9 |
| Randolph | NE | 2023-2024 | 0 | 4 | 4 |
| Ray | NW | 2022-2023 | 1 | 0 | 1 |
| Scotland | NE | 2023-2024 | 0 | 3 | 3 |
| St. Clair | KC | 2016-2017 | 11 | 0 | 11 |
| St. Francois | SE | 2022-2023 | 1 | 0 | 1 |
| Ste. Genevieve | SE | 2017-2018 | 71 | 31 | 102 |
| Stone | SW | 2018-2019 | 14 | 7 | 21 |
| Sullivan | NE | 2022-2023 | 3 | 2 | 5 |
| Taney | SW | 2018-2019 | 8 | 9 | 17 |
| Washington | STL | 2021-2022 | 1 | 0 | 1 |
| Total (39) | 8 new | 410 | 162 | 572 |