TOPHAND News ServiceScrewworm Watch

Latest updates

Current reports and official guidance.

July 15, 2026

TAHC confirmed a Pecos County sheep detection

The July 15 Texas Animal Health Commission Executive Director’s Order confirms a New World screwworm sheep case detected in Pecos County on July 14.

Source: TAHC
July 15, 2026

FDA issued short-term prevention EUAs for horse NWS protection

FDA authorized Ivermectin Liquid for Horses and Dectomax/Dectomax-CA1 for limited prevention use against NWS myiasis in susceptible horses and recommends veterinary guidance for use.

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July 10, 2026

FDACS announces import controls for warm-blooded animals from NWS risk areas

Florida’s Department of Agriculture and Consumer Services announced emergency measures for warm-blooded animal movements tied to New World screwworm risk handling.

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July 9, 2026

TAHC confirmed a Brewster County bovine detection and added Infested Zone 13

A July 9 Executive Director Order confirms a new bovine detection in Brewster County and sets Infested Zone 13 with continued movement restrictions.

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July 8, 2026

TAHC modified zone order after a new Crockett County detection

TAHC replaced the July 3 order with a fourth modification after a July 7 bovine detection in Crockett County, now designating updated Zone 07.D map areas.

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Response Debate

Sterile flies, SWASS, surveillance, and the urgency argument.

Sterile insect technique

The proven backbone: release sterile males so females lay nonviable eggs. USDA says current investments aim to approach historical production levels used during eradication.

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SWASS and bait systems

Miller is pressing for SWASS as a bridge tool to kill fertile adult flies while sterile-fly capacity ramps. USDA and other experts continue weighing modern bait, lure, and environmental constraints.

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Texas production capacity

APHIS lists Pacora, Metapa, and Moore Air Base as production or dispersal nodes. Moore Air Base is listed as an operational dispersal facility and a future domestic production site.

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