Texas: Chronic Wasting Disease detected in Matagorda and Mason Counties Texas: Chronic Wasting Disease detected in Matagorda and Mason Counties Chronic Wasting Disease (CWD) has been discovered in deer breeding facilities in both Matagorda and Mason counties, according to the Texas Animal Health Commission. This marks the first positive detection of the disease in each county. Image/skeeze via pixabay An epidemiological investigation found that both deer breeding facilities had received deer from the Uvalde County premises confirmed positive with CWD on March 29, 2021. Postmortem tissue samples were submitted by the permitted deer breeders to assist Texas Parks and Wildlife Department (TPWD) and Texas Animal Health Commission (TAHC) with the epidemiological investigation. The National Veterinary Services Laboratory (NVSL) in Ames, Iowa, has since confirmed CWD in those tissue samples.