06/23/2026
SCREWWORM UPDATE - JUNE 23, 2026
Dearest Readers,
As of 12:30 am today, the United States has confirmed 15 cases of New World Screwworm since the first detection earlier this month.
The most recent update added:
• 1 lamb in Crockett County, Texas
• 2 calves in Edwards County, Texas
Confirmed cases have now been identified in multiple species, including cattle, sheep, goats, dogs, and wildlife investigations remain ongoing.
This serves as an important reminder that screwworm is not strictly a cattle issue. Any warm-blooded animal with a wound can become a host.
The map released by the Texas Animal Health Commission and USDA currently shows these Texas counties with confirmed livestock cases:
• Zavala
• La Salle
• Gillespie
• Edwards
• Sutton
• Tom Green
• Crockett (new)
When looking at the map, one thing immediately stands out. The outbreak is no longer confined to a single county or a small cluster along the border. Instead, confirmed cases now form a corridor stretching through a significant portion of South and Central Texas ranch country.
-The red outlined counties represent confirmed detections.
-The yellow counties are quarantine zones where movement restrictions and enhanced surveillance are in place.
-The green counties are local reference counties that currently have no confirmed cases.
What many people may not realize is that the expanding quarantine area is actually a good sign. It means officials are attempting to get ahead of the fly rather than waiting for additional counties to become infected before taking action.
Crockett County is especially noteworthy because it pushes the known footprint farther north and west. Gillespie County also continues to draw attention because it sits outside the original South Texas cluster, showing that surveillance efforts are finding cases beyond the initial outbreak area.
The good news is that the map still appears to reflect a containment effort. Cases are being detected, reported, quarantined, and responded to quickly.
Sterile fly releases continue, surveillance is increasing, and movement restrictions are being used to slow spread.
The bad news is that screwworm does not recognize county lines, property fences, species, or registration papers. It only needs a wound.
Every confirmed case started with an injury, no matter how small.
Check cuts, tick bites, navels on newborns, branding sites, ear tags, and castration sites.
Then check them again tomorrow.
This map doesn't tell us it's time to panic.
It tells us it's time to pay attention.
Always Observing,
The Bettys ☕️
More information:
Treatment (long version): https://www.facebook.com/share/1ELCxAmKRi/?mibextid=wwXIfr
Treatment (short version): https://www.facebook.com/share/1BRi1QxcYw/?mibextid=wwXIfr
What does it look like? https://www.facebook.com/share/r/1BQ7FNad1d/?mibextid=wwXIfr
What are they attracted to? https://www.facebook.com/share/1956k754Ui/?mibextid=wwXIfr
Timeline: https://www.facebook.com/share/18kn22cmVb/?mibextid=wwXIfr