Screw Worms detected in the US/South Texas

17,827 Views | 179 Replies | Last: 10 hrs ago by TAMUallen
Serious Lee
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i bet that ****er bill gates is giddy as a kid in a candy shop over this. awfully convenient for that class of people
itsyourboypookie
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Andrew's county is a whole big minute from the border.

This thing has legs.

909Ag2006
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AG
Faaahk
"They weren't raiding a Girl Scout troop looking for overdue library books."
Deerdude
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They already said that the Andrew's county dog had traveled from Mx recently. Got to wonder if smuggled through border or if inspectors missed it?
itsyourboypookie
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And the goat that lives in Fredericksburg?

TX_COWDOC
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GeorgiAg
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[Non-political issue]

F16: Blame Trump! Blame Biden!
austinAG90
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itsyourboypookie said:

And the goat that lives in Fredericksburg?



And here's pookie, never passing up an opportunity try and gloat.

Admit it, you just sad because one less goat.
itsyourboypookie
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austinAG90 said:

itsyourboypookie said:

And the goat that lives in Fredericksburg?



And here's pookie, never passing up an opportunity try and gloat.

Admit it, you just sad because one less goat.


Ivermectin will cure the goat.

The wildlife that are currently ate up with this maggot, you'd have to find them first.

Beef demand will plummet once your wives see those pics on their timelines.

Hedge your cattle fellas
austinAG90
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itsyourboypookie said:

austinAG90 said:

itsyourboypookie said:

And the goat that lives in Fredericksburg?



And here's pookie, never passing up an opportunity try and gloat.

Admit it, you just sad because one less goat.


Ivermectin will cure the goat.

The wildlife that are currently ate up with this maggot, you'd have to find them first.

Beef demand will plummet once your wives see those pics on their timelines.

Hedge your cattle fellas

I have my own cattle pookie. In fact have 1 ready to pick up at meat market this week.
hunter2012
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Confirmed to be in Andrew's county, it's on the high plains now.
javajaws
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IIIHorn said:

B-1 83 said:

Ciboag96 said:

It had been eradicated down to Panama. So….Mexico has dropped the ball again? Whodathunkit

Unrestricted livestock movement S -> N in Mexico helped it along.


That's not what I herd.

Is it ok to laugh at the pun, but not the problem? Because I admit it - I laughed.
txags92
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hunter2012 said:

Confirmed to be in Andrew's county, it's on the high plains now.

That one was reportedly a dog from New Mexico that was being seen by a vet in Andrews County. Counted as the first NM case.
HTownAg98
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itsyourboypookie said:

austinAG90 said:

itsyourboypookie said:

And the goat that lives in Fredericksburg?



And here's pookie, never passing up an opportunity try and gloat.

Admit it, you just sad because one less goat.


Ivermectin will cure the goat.

The wildlife that are currently ate up with this maggot, you'd have to find them first.

Beef demand will plummet once your wives see those pics on their timelines.

Hedge your cattle fellas

Yeah that's not going to happen.
ProgN
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itsyourboypookie said:

austinAG90 said:

itsyourboypookie said:

And the goat that lives in Fredericksburg?



And here's pookie, never passing up an opportunity try and gloat.

Admit it, you just sad because one less goat.


Ivermectin will cure the goat.

The wildlife that are currently ate up with this maggot, you'd have to find them first.

Beef demand will plummet once your wives see those pics on their timelines.

Hedge your cattle fellas

What is the timeline from infection to death for infected animals? Is it days, weeks, years?

Ivermectin is an anti-parasitic, correct?

If Ivermectin is effective at fighting screwworm infection, then it seems to me that there would be a market for the manufacturer of cattle cubes and de-worming blocks to add Ivermectin to their products if it doesn't already exist. Wouldn't you agree? Admittedly, ag/livestock is not my specialty, but trying to think outside of the box. If vets or ranchers post that I'm an ignorant idiot, then I'm ok with that because I lack their experience on things like this. I'd be interested to hear from them though on my idea.
fullback44
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There was already a big article on this last year on this board, Lyssy and Echols is/was trying to get the FDA or one of those organizations to approve it in deer and cattle food, I think they may have recently received the approval if I remember correctly, farmers will be feeding ivermectin (or a similar dewormer) in cubes or other feed soon if this was passed. Maybe someone has more knowledge on this very issue
JVSchroeder
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Doramectin is the product most commonly used for New World screwworm. It's in Dectomax and gives about three weeks of protection against.

Ivermectin can kill screwworm larvae, but doramectin is generally the product used because of its longer residual and better preventive protection.

It's also Eckle, not Echol.
Kenneth_2003
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If it's been discussed, my apologies...

What is the timeline for restarting the sterile fly program and getting flies deployed in meaningful #s?
MouthBQ98
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Eradication is better than having to try to prevatative treat every warm blooded animal you don't want to take serious population damage. Far less costly in the long run. In the short term, it will be necessary but the eradication program must be done again and this will require a significant reduction in living thing traffic north/south
nortex97
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It can apparently kill a cow in a week.
Quote:

Screwworm biology

New World screwworm fly (Cochliomyia hominivorax) on Friday, Jun 06, 2025, in College Station, Texas. (Michael Miller/Texas A&M AgriLife)

The female NWS fly lays eggs in and around open wounds or sores within mucous membranes of warm-blooded animals. The term "screwworm" refers to how the newly hatched larvae burrow into live tissue, feeding aggressively and causing a condition known as myiasis. The odor of screwworm feeding on live flesh is notoriously distinct and often a first sign of detection. Livestock that have myiasis are immediately at risk of significant health and performance limitations and can die within a week or two of contracting the condition if not treated promptly.

Once NWS have become established on an animal, the larvae will remain on that same animal (will not be transfered to other livestock), and will complete their feeding period in 5 to 7 days before dropping to the ground to pupate and complete the rest of the NWS life cycle. Geographic spread of NWS is mostly attributed to infected animals being transported by humans and to a lesser extent, adult fly mobility.

Detection of livestock with myiasis is critical; however due to the rapid progression of the condition, this may prove especially difficult for large, extensively managed livestock operations. Limiting management practices in these operations that create a higher NWS risk to times of the year when NWS flies are less active will be paramount. To plan a production schedule with the threat of NWS in mind, it is helpful to recognize the impact of temperature on fly activity and development.

Disgusting parasitic *******s. Probably vote for democrats even.
bobbranco
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Nexgard has been a approved by FDA to protect dogs against the NWS.

Will Simparico Trio also protect dogs?
BTMTAT
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Yes on Trio. All of the isoxazolines are effective against screwworm larva (trio, nexgard, credelio)
chickencoupe16
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They both use isoxazoline drugs, so while I can't say for sure, it seems likely

Edit: ^seems like it does
BQ_90
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https://agrilifeextension.tamu.edu/new-world-screwworm

more info
bobbranco
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BTMTAT said:

Yes on Trio. All of the isoxazolines are effective against screwworm larva (trio, nexgard, credelio)


Thank you!
samurai_science
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https://www.fda.gov/animal-veterinary/cvm-updates/fda-issues-emergency-use-authorization-over-counter-injectable-drug-prevent-new-world-screwworm
reineraggie09
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Sharpshooter said:

Tyrannosaurus Ross said:

Muy said:

This whole sterile flies thing is completely new to me and amazing. Science is cool.

It works because the female fly only mates once. So you flood the zone with irradiated (sterile) males that compete with the non-irradiated native males. Females that mate with the irradiated males produce no offspring. Over time screwworm reproduction and population collapses.

There was an outbreak in S Texas in the early 70's, I believe. This method was used and solved the problem quite effectively.


Depends on who you talk to. The government called the US screwworm free in 1966. I have spoke to several veterinarians and producers old enough to remember screwworms and they claim they were still preset in the US into the 70s. Also some debate on how effective the flies were. They seem to recall the eradication didn't really take effect until they started killing adult flies with insecticides.

The sterile fly thing sounds good, but has some draw backs. California tried this with fruit flies. What they found is that the female fruit flies preferred the non-sterile males. The sterile males apparently were weaker fliers and so the females wanted to mate with the stronger males. I don't know if they have seen the same in screwworm flies, but in the words of Ian Malcom, life finds a way.
fixer
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nortex97 said:


Disgusting parasitic *******s. Probably vote for democrats even.


Try googling images of an infection with safe search off.

This **** is nightmare fuel.
itsyourboypookie
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Gaeilge said:

Agreed. Likely been here for her for a few months already. Just first confirmed ended up being further north than it should've been. I imagine some testing will take place south of La Pryor and be confirmed now as well.


I doubt it's the first confirmed case. What rancher wants his cattle quarantined when he's about to ship them? I'm guessing lots of cases have been treated, just not reported.
Deerdude
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Flip side is, if it were my cattle I'd be happy to report. State and feds are going to throw all kinds of resources at those initial cases and count me in. Only quarantine is mandatory inspection before shipping.
TX_COWDOC
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JVSchroeder

It's also Eckle, not Echol.[/quote said:


Agree with your post and obligatory….

Awchually-
It's Eckel not either of the above.
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Ag CPA
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Saw Brooke on CNBC discussing this Monday, politics aside who do you think is right here?

https://www.cnbc.com/2026/06/08/rollins-miller-texas-ag-chief-unserious-screwworm-threat-trump.html
Tex100
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https://x.com/Screwworm_RR/status/2064022178920550755?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E2064022178920550755%7Ctwgr%5Eca7cc58742c5b40a09a85cf43eea48676d20cfa4%7Ctwcon%5Es1_c10&ref_url=https%3A%2F%2***giehuddle.community.forum%2Fthreads%2***gies-in-the-news.927%2F

Trump appoints John Bellinger
Think he is c/o '76
txags92
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Ag CPA said:

Saw Brooke on CNBC discussing this Monday, politics aside who do you think is right here?

https://www.cnbc.com/2026/06/08/rollins-miller-texas-ag-chief-unserious-screwworm-threat-trump.html


Brooke. Sid is pissed because he lost his primary and is lashing out at the Trump admin.
Deepin theHart80
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Re: meds in feed, unless you are in a feedlot, you cannot control intake. Some animals will get too much, most not enough. That could lead to immunity problems. Proper livestock consumption in a range situation is one thing. Deer is a whole lot bigger problem.
 
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