CWD Surveillance

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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.

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2024 CWD Management Zone Counties
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Map of CWD Management Zone (shaded counties). MDC also conducts surveillance throughout the state each year.
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MDC
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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.

 
 
 
 
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CWD in Free-Ranging Deer

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This map shows cases of CWD found so far in free-ranging deer.
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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.

Total CWD-positives (free-ranging deer) by County (through 5/22/2024)
CountyRegionYear of 1st PositivePre-2023 Positives2023 PositivesTotal Positives
AdairNE2014-201526329
BarrySW2021-2022516
BartonSW2022-202391524
CarrollNW2022-2023123
CedarSW2017-2018404
CharitonNW2023-2024044
ChristianSW2021-2022202
ClarkNE2023-2024011
ColeCEN2014-2015101
CrawfordSTL2018-2019336
DallasSW2022-2023145
FranklinSTL2015-2016522375
GasconadeCEN2022-2023101
GrundyNW2023-2024011
HickorySW2022-2023101
HowellOZ2021-2022101
JasperSW2023-2024011
JeffersonSTL2016-2017281543
LinnNW2015-201652961
LivingstonNW2022-2023101
MaconNE2011-201270777
MariesCEN2023-2024011
MercerNW2018-2019101
OregonOZ2018-201916420
OsageCEN2023-2024033
PerrySE2017-20189312
PolkSW2017-20188210
PulaskiOZ2020-2021213
PutnamNE2020-2021639
RandolphNE2023-2024044
RayNW2022-2023101
ScotlandNE2023-2024033
St. ClairKC2016-201711011
St. FrancoisSE2022-2023101
Ste. GenevieveSE2017-20187131102
StoneSW2018-201914721
SullivanNE2022-2023325
TaneySW2018-20198917
WashingtonSTL2021-2022101
Total (39)8 new 410162572