Chronic Wasting Disease
Chronic Wasting Disease (CWD) is a neurological disease in deer, elk, moose and other members of the deer family, known as "cervids." The disease was first recognized in 1967 in captive mule deer in Colorado, and has since been documented in captive and free-ranging deer in states and two Canadian Provinces. The first case of CWD in Texas was discovered in 2012 in free-ranging mule deer in an isolated area of far West Texas.
This disease presents numerous challenges for state wildlife agencies across North America. Of concern is the potential for decline within deer, elk, or other susceptible cervid populations. In addition, CWD could have indirect impacts on hunting, hunter participation, and economic benefits derived from big game hunting. In Texas, hunting is a $2.2 billion economic engine, supporting many rural towns across the state.
Because eradication is thought to be impossible once CWD becomes established in a population, it is imperative that a sound CWD management program is established to reduce the severity of implications resulting from the disease. Of course, disease prevention is the best approach to protect cervid populations and prevent social and economic repercussions. Texas Parks and Wildlife Department (TPWD) and Texas Animal Health Commission (TAHC) have developed a cooperative CWD management plan to guide both agencies in addressing risks, developing management strategies, and protecting big game resources from CWD in captive or free-ranging cervid populations.
CWD Management and Regulations for Hunters
Mandatory CWD Testing Requirements
Hunters who harvest mule deer, white-tailed deer, elk, red deer, or other CWD susceptible species within the Trans-Pecos, Panhandle, and South-Central Texas CWD Containment and Surveillance Zones are REQUIRED to bring their animals to a TPWD check station within 48 hours of harvest. TPWD urges voluntary sampling of hunter harvested deer outside of the CWD zones. Hunters interested in providing voluntary samples can contact their local TPWD biologist or bring their animals to any of the check stations located around the state. If bringing a quartered animal and the associated head to a check station, be sure to remove the head from the carcass 2 to 3 vertebrae below the head to ensure that the appropriate tissues for CWD testing are not damaged. Hunters should keep heads cool but not frozen. Rules also impose restriction of permitted live-deer movements to and from CWD zones. The rules are part of the state’s comprehensive CWD management plan to contain the disease to the areas where it is known to exist.
Hunters are encouraged to report any “sick looking” deer, elk, or other CWD susceptible species while hunting in any CWD zone to TPWD. Contact information for the CWD zone check stations is found within the CWD section of the current Outdoor Annual and associated smart device application. To report a “sick looking” deer outside of a CWD zone, contact a TPWD wildlife biologist or Texas Game Warden.
Mandatory Carcass Movement Restrictions
Hunters cannot bring into Texas deer, elk, or other CWD susceptible species’ carcasses or parts of carcasses from another state or country known to have CWD or transport carcasses or parts of carcasses out of a CWD zone within Texas except under the following conditions:
- cut quarters with all brain and spinal cord tissue removed;
- boned meat — Texas regulations do not allow processing beyond quarters until reaching your final destination (home or processing facility);
- cut and wrapped meat — Texas regulations do not allow processing beyond quarters until reaching your final destination (home or processing facility);
- caped hides with skull not attached;
- skull plate with antlers attached and cleaned of all soft tissue
- finished taxidermy products;
- the skinned or unskinned head of a susceptible species may be transported to a taxidermist, provide all brain material, soft tissue, spinal column and any unused portions of the head are disposed of in a landfill in Texas permitted by Texas Commission on Environmental Quality. A Deer Head Waiver Form must be obtained from a TPWD CWD check station or the TPWD CWD website before transporting an intact head from CWD zone or state or country known to have CWD. The waiver should be completed and kept on your person or with the deer head until it reaches the taxidermist. Present the form to the taxidermist to ensure they are aware of the disposal requirements on non-useable parts from the head;
Carcass movement restrictions do not apply if the carcass will not be moved outside of a CWD zone. However, it is recommended to always properly dispose of unused carcass parts.
For a map of the current distribution of CWD in North America, see the U.S. Geological Survey's Distribution of Chronic Wasting Disease in North America.
Other states may have rules regarding CWD susceptible species carcasses entering their state. If you are from another state and hunting in Texas, be sure and check your home state’s CWD requirements. A map of states with CWD carcass entry restrictions is available on the Carcass Transportation Regulations in the United States and Canada.
The TPWD Outdoor Annual Chronic Wasting Disease webpage has detailed information on CWD including regulations, check station information, and carcass movement restrictions.
Texas Animal Health Commission (TAHC) website has detailed information on their statewide mandatory testing requirements of exotic CWD susceptible species such as elk, red deer, sika, moose, reindeer, and any associated subspecies and hybrids.
CWD in Texas
The first case of CWD in Texas was discovered in 2012 in free-ranging mule deer in the Hueco Mountains of far West Texas. The disease has since been detected in free-ranging mule deer, white-tailed deer, and elk in Dallam and Hartley counties, located in the northwest Panhandle.
The first case of CWD in Texas white-tailed deer was found in a Medina County deer-breeding facility in 2015 as a result of routine disease monitoring. Increased testing requirements resulted in the detection of CWD in 4 additional deer breeding facilities and two release sites adjacent to the CWD-positive deer breeding facilities. CWD was also detected in a free-ranging white-tailed deer in Medina County in 2017 — for details and chronology of CWD detections in Texas, see CWD Positives in Texas webpage.
With the discovery of CWD in a captive deer breeding facility in south-central Texas, the Texas Parks and Wildlife (TPW) Commission adopted comprehensive CWD Management Rules on June 20, 2016. Developed through a collaborative process that involved substantial stakeholder input, these rules address CWD management associated with permitting programs that authorize intensive deer management activities — for more information, read the Comprehensive CWD Management Rules PDF.
Additional rules regarding CWD monitoring zones and carcass movement restrictions were adopted by the TPW Commission on August 25, 2016. As new cases of CWD were discovered in additional captive deer breeding facilities as well as free-ranging deer and elk in 2016/2017, the TPW Commission adopted modifications to the rules pertaining to live-deer movements into, within, and out of CWD Containment Zones and Surveillance Zones. Both sets of rules are intended to reduce the chances of spreading CWD and increasing the chances of detecting and containing CWD in areas where it might be present.
TPWD CWD Management Plan
The Chronic Wasting Disease Management Plan will serve to guide TPWD and TAHC in addressing risks, developing management strategies and protecting big game resources from CWD in captive or free-ranging cervid populations. Both agencies recognize the need for full cooperation and partnership among government agencies, conservation organizations, private landowners, hunters and the general public in managing CWD in Texas. CWD is a reportable disease and TAHC has authority to require reporting of this disease in exotic livestock including elk, red deer, sika deer and their hybrids, and for overseeing a voluntary herd certification program for interstate movement of CWD susceptible species. TPWD has regulatory authority for free-ranging white-tailed deer and mule deer, and both agencies have regulatory authority regarding certain disease surveillance and movement qualification standards.
This management plan is intended to be dynamic; management strategies described within are likely to change as both the epidemiology and management of this disease become better understood through time. Thus, more specific, science-based responses may be developed and incorporated into this plan following further discoveries of CWD or more impactful management techniques. Three major goals of this CWD management plan are:
Manage for healthy free-ranging and captive white-tailed deer, mule deer, and other susceptible species in Texas.
Establish and maintain stakeholder support for CWD management through effective outreach and communication.
Minimize direct and indirect impacts of CWD to hunting, hunting related economies, and conservation in Texas.
Texas CWD Symposiums
CWD Symposium 2018
Check Stations and Zones
Certified CWD Collectors
These individuals have been certified to collect postmortem CWD samples by Texas Animal Health Commission (TAHC) and have been provided materials and supplies to properly act as a TPWD sample collection station. Select a county to see certified CWD collectors.
- Counties where CWD Exposed Deer were Released, September 2021
- Number of CWD Exposed Deer Released by County, September 2021
- Collecting Retropharyngeal Lymph Nodes and Obex for CWD Sampling Video
- Collecting an Obex for CWD Sampling from a Trophy Animal Video
- Best Practices for Cleaning CWD Sample Collection Tools Video
- Landowners' Frequently Asked Questions: CWD Implications on Private Lands and CWD Testing
- TPWD Deer Permits Information
- Deer Head Waiver for Areas with Carcass Restrictions Form PDF
- TPWD Chronic Wasting Disease Fact Sheet PDF
- TPWD Common Sense Precautions for Handling and Processing Deer PDF
- American Veterinary Medical Association: Disease Precautions for Hunters webpage
- Texas Animal Health Commission: Chronic Wasting Disease webpage
- Centers for Disease Control and Prevention: Chronic Wasting Disease webpage
- Chronic Wasting Disease Alliance Website