Screwworm confirmed in Texas elk in first wildlife detection of current outbreak

What you need to know

• The finding confirms an infection in one wild animal, but the supplied reporting does not establish how far, if at all, the parasite has spread among wildlife in the area. No population-level effects are documented. 124
• The case came to light through a hunter-harvested elk, rather than a reported death attributed to screwworm. The sources do not say that the infestation caused the animal’s death. 12
• The Texas detection is significant as the first wildlife case identified in the current outbreak. It should not be described as the first US wildlife case in decades, given the earlier Key deer outbreak in Florida. 136
• USDA and the Texas Parks and Wildlife Department are carrying out additional wildlife surveillance in the area. The Texas Animal Health Commission will also modify an existing infested zone. 12
• Authorities and reporting describe hunter reporting as part of the response. The available sources do not yet give results from follow-up surveillance. 126

Why this matters

A confirmed infection in wildlife is a direct animal-health concern, while the extent of any further exposure remains unresolved. The earlier Florida outbreak also shows why this detection needs to be distinguished from the first wildlife case in US history. 136

What happens next

Authorities say wildlife surveillance is under way in the area, alongside a change to the existing infested zone. The reporting supplied so far does not include findings from that follow-up work. 126

What we know

• The infected animal was a female elk harvested by a hunter at a game ranch in Pecos County, Texas. 12
• A sample was confirmed at a federal laboratory in Kerrville. 2
• This is the first wildlife detection in the current outbreak. 12
• Key deer were affected by an earlier outbreak in the Florida Keys in 2016; authorities eradicated it by early 2017. 3

What we don't know

• It is not known whether surveillance will identify further wildlife cases. 126
• The sources do not establish whether the elk’s infection was associated with broader exposure among local wildlife. 12
• The reports do not establish the infestation’s status or severity in the elk, or whether it caused the animal’s death. 12
• No population-level effects are reported, and the follow-up surveillance results are not yet available in the supplied reporting. 126

Read the reporting

This WildNews briefing synthesises and summarises reporting from the sources below. WildNews did not produce the original reporting. Learn more about how we use AI