EQUUS

New World Screwworm Watch

UPDATES FOR HORSE OWNERS BASED ON USDA TRACKING
Confirmed Cases by Animal1 equine case confirmed
🐄Cattle×22
🐑Sheep×16
🐐Goats×6
🐕Dog×4
🐎Horse×1
Total Confirmed Cases49

2 active across 2 states and 18 counties, sourced from USDA APHIS.

New in Last 30 Days04

Detections confirmed in the most recent 30-day window. Updated Sep 12, 2026.

Highlights your state on the map and filters the list below.

Last updated: Sep 12, 2026Live data from USDA APHIS
Why This Matters for Horse Owners

1 confirmed equine case — and the range is expanding.

New World screwworm targets any warm-blooded animal with an open wound. Wherever it is confirmed in cattle, deer, or other livestock, horses in the same area are at risk. Treat every detection on this map as a signal to step up daily wound checks and fly control on your own herd.

Continental Surveillance & Risk Distribution

State-level density of confirmed New World screwworm detections. Brass-toned states have reported cases; intensity scales with case count.

Confirmed cases
No reported cases

Hover any state for its detection count. Geographic data: U.S. Atlas / Census Bureau.

Latest Confirmed Detections

DateCountyStateTypeSpeciesStatus
Sep 9, 2026PresidioTexasDomesticHorseActive
Aug 31, 2026CrockettTexasDomesticDogActive
Aug 25, 2026Val VerdeTexasDomesticGoatsInactive
Aug 16, 2026Val VerdeTexasDomesticSheepInactive
Aug 5, 2026TerrellTexasDomesticSheepInactive
Jul 31, 2026PecosTexasDomesticSheepInactive
Jul 30, 2026BrewsterTexasDomesticCattleInactive
Jul 29, 2026BrewsterTexasDomesticCattleInactive
Jul 21, 2026SuttonTexasDomesticGoatsInactive
Jul 18, 2026SchleicherTexasDomesticSheepInactive
Jul 17, 2026StarrTexasDomesticCattleInactive
Jul 14, 2026PecosTexasDomesticSheepInactive
Jul 14, 2026PecosTexasDomesticSheepInactive
Jul 13, 2026BrewsterTexasDomesticCattleInactive
Jul 13, 2026SuttonTexasDomesticDogInactive
Jul 10, 2026CrockettTexasDomesticGoatsInactive
Jul 9, 2026BrewsterTexasDomesticCattleInactive
Jul 7, 2026CrockettTexasDomesticCattleInactive
Jul 3, 2026CrockettTexasDomesticSheepInactive
Jun 30, 2026CrockettTexasDomesticSheepInactive
Jun 30, 2026CrockettTexasDomesticSheepInactive
Jun 29, 2026PecosTexasDomesticDogInactive
Jun 29, 2026UvaldeTexasDomesticCattleInactive
Jun 27, 2026CrockettTexasDomesticCattleInactive
Jun 26, 2026Jim HoggTexasDomesticCattleInactive
Jun 24, 2026CrockettTexasDomesticSheepInactive
Jun 24, 2026CrockettTexasDomesticSheepInactive
Jun 24, 2026CrockettTexasDomesticSheepInactive
Jun 24, 2026CrockettTexasDomesticSheepInactive
Jun 24, 2026EdwardsTexasDomesticSheepInactive
Jun 24, 2026MedinaTexasDomesticCattleInactive
Jun 23, 2026TerrellTexasDomesticCattleInactive
Jun 23, 2026TerrellTexasDomesticCattleInactive
Jun 23, 2026TerrellTexasDomesticCattleInactive
Jun 22, 2026TerrellTexasDomesticGoatsInactive
Jun 21, 2026EdwardsTexasDomesticCattleInactive
Jun 20, 2026CrockettTexasDomesticSheepInactive
Jun 12, 2026SuttonTexasDomesticSheepInactive
Jun 11, 2026EdwardsTexasDomesticCattleInactive
Jun 11, 2026EdwardsTexasDomesticGoatsInactive
Jun 11, 2026Tom GreenTexasDomesticCattleInactive
Jun 11, 2026ZavalaTexasDomesticCattleInactive
Jun 9, 2026EdwardsTexasDomesticCattleInactive
Jun 8, 2026GillespieTexasDomesticGoatsInactive
Jun 8, 2026La SalleTexasDomesticCattleInactive
Jun 7, 2026La SalleTexasDomesticCattleInactive
Jun 7, 2026LeaNew MexicoDomesticDogInactive
Jun 5, 2026ZavalaTexasDomesticCattleInactive
Jun 3, 2026ZavalaTexasDomesticCattleInactive
HOW TO PROTECT HORSES

What to watch for, and what to do

New World screwworm (Cochliomyia hominivorax) lays eggs in fresh wounds. Larvae feed on living tissue and the infestation worsens quickly. Early detection and prompt reporting are the most effective protections for your horse.

Daily Inspection

Check your horses every day for wounds — even minor cuts, scrapes, tick bites, or fresh navel/castration sites. The smell of any wound can attract egg-laying flies.

Wound Care

Clean and treat every wound promptly. Apply an EPA-approved fly repellent or wound dressing and re-check until fully healed. Watch for a foul odor, bloody discharge, or visible larvae — all suggest possible infestation.

Report Suspected Cases

If you see larvae, do not destroy the sample — collect a few in rubbing alcohol if you can and contact your veterinarian or State Animal Health Official immediately. You can also reach USDA APHIS at 1-866-417-7623.

SOURCE

USDA APHIS — Confirmed Detections Dashboard

Our summary is curated from the official USDA APHIS surveillance dashboard. Always defer to the official dashboard for the most current figures.

Open the official USDA APHIS dashboard ↗