Crockett County Now Leads Texas in New World Screwworm Cases

CROCKETT COUNTY, TX — Crockett County has recorded the highest number of confirmed New World screwworm cases in the ongoing U.S. outbreak, with eight domestic animal detections as of the latest federal data. 

According to the U.S. Department of Agriculture, the total number of confirmed cases nationwide has reached 31 — all in domestic animals and all in Texas except for one in New Mexico. 

Crockett County leads with eight cases, followed by Edwards County with six and Terrell County with four. The most recent detection in Crockett County was reported on June 30, 2026.

The first confirmed case in the United States was reported on June 3, 2026, in Zavala County, Texas, involving cattle. Since then, the detections have been concentrated in a cluster of counties in South and Southwest Texas, with some spread into Central Texas and even Tom Green County. 

Here are the counties with confirmed cases and their totals:

• Crockett County: 8 cases (Active)
• Edwards County: 6 cases (Active)
• Terrell County: 4 cases (Active)
• Zavala County: 3 cases (Inactive)
• La Salle County: 2 cases (Inactive)
• Tom Green County: 1 case (Active)
• Uvalde County: 1 case (Active)
• Jim Hogg County: 1 case (Active)
• Medina County: 1 case (Active)
• Pecos County: 1 case (Inactive)
• Sutton County: 1 case (Inactive)
• Gillespie County: 1 case (Inactive)
• Lea County, New Mexico: 1 case (Inactive — a dog)

The cases have primarily involved cattle and sheep, along with some goats and one dog in New Mexico. No cases have been reported in wildlife or through fly traps to date. 

The USDA notes that a fly trap detection means at least one wild fly was captured; none have been recorded so far in this outbreak.

The USDA continues to monitor the situation closely, with data updated daily at 6 p.m. ET. Officials have emphasized that only domestic animal cases are currently being reported in this outbreak. 

Ranchers and veterinarians in affected areas are urged to remain vigilant for signs of screwworm infestation, which can cause serious harm to livestock.

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