Screwworm in Texas Was Announced June 3 But EUAs Began in August 2025 (?!)

[GreatGazoo]

So how long has it been here? I have to think they didn't do 10 Emergency Use Authorizations on the first day; these things take a little time.

February 5, 2026

Today the U.S. Food and Drug Administration issued an Emergency Use Authorization (EUA) for Ivomec (ivermectin) injectable solution against New World screwworm (NWS). The agency has concluded that based on the scientific evidence available, it is reasonable to believe that Ivomec may be effective for the prevention of infestations caused by NWS larvae (myiasis) in cattle when administered within 24 hours of birth, at the time of castration, or when a wound appears,

https://www.fda.gov/animal-veterinary/cvm-updates/fda-issues-emergency-use-authorization-over-counter-injectable-drug-prevent-new-world-screwworm

Ivomec is one of the 10+ EUA tools that show impact:

Ivermectin at 200 micrograms/kg caused 100% mortality of screw-worm larvae up to 2 days old at the time of treatment with 70, 64 and 21% mortality of 3-, 4- and 5-day old larvae at the time of treatment. The residual protection from a single dose of 200 micrograms/kg was 16 to 20 days. When bull calves were treated with ivermectin at a dose of 200 micrograms/kg at the time of castration and branding, none of the 77 treated animals sustained a screw-worm strike in the scrotal area compared with 47 strikes (44%) in the 106 control cattle.

https://pubmed.ncbi.nlm.nih.gov/3840994/

USDA also increasing the production and release of sterile flies:

U.S. Department of Agriculture Secretary Brooke Rollins on Thursday said the agency aims to increase production to 30 million sterile flies per week by the end of the summer. That figure is expected to rise to 100 million flies per week by the end of the year, Rollins added.

https://www.tpr.org/news/2026-06-05/heres-what-officials-are-doing-to-stop-the-spread-of-new-world-screwworm-in-texas

[hlthe2b]

1. Surveillance along US-Mexico Border, into Mexico and Central America has been ongoing for

decades. Positive cattle have been monitored in Mexico for some time. Thus, this is in response to what those overseeing KNEW would likely result in US cases--as it has.

Heavens. Don't criticize what was proactive and appropriate actions in anticipation of what was being seen in Mexico. We are fortunate that, given the decimation of knowledgeable professional staff at USDA, CDC, FDA and the state health departments throughout the West/Southwest, that we are able to mount any kind of proactive and appropriate response. The lawyer Trump sycophant heading USDA is fairly worthless, but there remain knowledgeable staff that can move her in the correct directions.

[GreatGazoo]

3. Didn't critize the response -- just wondered what the actual timing was

Seems likely they had cases a year ago and didn't announce it.

I detailed three good ways they are responding.

[Marie Marie]

2. MAGATS are still fighting COVID with Ivermectin. What are they going to do now that it is being

used for what it was intended?

[BadgerKid]

4. Recouping losses on ivermectin investments

That didn’t pan out during covid because most people didn’t fall for it? So, disable fly monitoring to let it spread in the US?

Call me very cynical.

[Marie Marie]

5. Hey there Cynical...

Your theory may be spot on - like they always say: follow the money.