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Texas Screwworm Detections Surge; Hunters Asked to Help Track Parasite in Wildlife
Texas recorded 15 New World screwworm detections in October and 22 more in the first 11 days of November, prompting federal and state officials to enlist hunters as extra eyes during deer season. The parasite has now been found in 24 counties and at 72 premises, including the first U.S. wildlife case in an elk in Pecos County.
Texas is seeing a sharp rise in New World screwworm detections this fall, and with deer hunting season underway, federal and state officials are asking hunters to help spot signs of the parasite in wildlife.
According to U.S. Department of Agriculture data, Texas recorded 15 detections in October, up from three in September. Another 22 detections were logged in the first 11 days of November. The Texas Animal Health Commission reports the parasite has been found in 24 Texas counties during the current outbreak, with at least one confirmed detection at 72 premises.
Much of the attention has focused on cattle and other livestock, but wildlife can also be affected. In October, a hunter harvesting an elk on a game ranch in Pecos County helped identify the first confirmed case of New World screwworm in U.S. wildlife during this outbreak. The Texas Parks and Wildlife Department confirmed the detection on Oct. 21 after a sample from the female elk tested positive. A second elk detection was confirmed in Jeff Davis County on Nov. 4, prompting state officials to modify an existing infestation zone in West Texas.
"We really need people to be our eyes that are out there," said Rear Adm. Michael Schmoyer, associate administrator with the USDA's Animal and Plant Health Inspection Service. Schmoyer described hunters as a "force multiplier" for efforts to identify possible infestations, particularly in areas where wildlife may not otherwise be regularly observed.
The USDA recently launched a resource page for hunters and outdoor enthusiasts that outlines how to recognize potential infestations and report suspected cases.
New World screwworm is a parasitic fly whose larvae feed on the living tissue of warm-blooded animals. Female flies lay eggs in open wounds or other vulnerable areas, and when the larvae hatch they burrow into tissue, potentially causing serious injury or death if left untreated.
The Texas Parks and Wildlife Department recommends hunters watch for signs of possible infestation, including unusual irritation, head shaking, foul-smelling wounds, visible larvae and animals isolating themselves from others. Hunters are also encouraged to inspect harvested animals before field dressing or moving the carcass, paying particular attention to the eyes, ears, nose, mouth and other vulnerable areas.
If a hunter suspects an infestation in wildlife, officials recommend contacting a local TPWD wildlife biologist or calling 512-389-4505. Additional information is available through the USDA's New World screwworm wildlife resources and the Texas Parks and Wildlife Department.