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Featured Replies

*** Fair warning   ..For those a bit squeem-ish when it comes to gross things,  you might want to look away..   ****

A few years back, i'd mentioned something ..somewhere.. regarding an insect " pest " that  legitimately qualifies as a threat.. Not necessarily to plants,  but  to ..anything else, inc. humans.. 


While flies themselves are pretty gross creatures, the New World Screw worm,  Cochliomyia homnivorax  ups the " Gross " factor  ..just a bit..  The Latin name literally translates to " Man Eater "  ..and yes, this Bug- eyed, Obligate Parasite can kill a man ( ..or woman ) and was once one of the greatest threats to livestock in the US  " back in the day "  ...up until it was eradicated from the US in the early 80s.

That campaign continued thru the 90s / earlier 2Ks until this insect was beaten back to -roughly- the Darien Gap in Panama. Beyond that, in South America, and some islands in the Caribbean where it hangs on,  the efforts to fully take out this insect has been challenging due to terrain, costs, and / or political will.

It was gone here in the states until it quietly reappeared in the FL. Keys sometime in 2016 where the outbreak seen there killed numerous Key Deer, and was detected in a stray Dog in Homestead just north of the designated quarantine zone there before the control measures used to knock down this insect worked as planned.

Fast forward to last summer, and while doing my yearly " check in " on efforts to control / any new, general research on this insect,  there were reports coming out of both Panama and Costa Rica of new outbreaks being seen in some areas of both countries.

Tack on another year and it appears the threat posed by this insect is quickly spreading across all of Central America, with a detection noted in Chiapas in the last couple weeks.. This is occurring despite re-invigorated and stepped up efforts to get the more severe outbreaks in Panama and Costa Rica under control again..

When i'd read the last reports of it being detected in Guatemala, i had a feeling it wouldn't be long until it reached southern Mexico.. That has happened..  Question now is ..how far north will it progress? ..and can the control efforts currently underway stop the advance - before- outbreaks are detected much closer to the US?

Before full eradication, when it roamed the US, outbreaks were seen as far west as central California, As far north as the Central Plains and Southeastern states, north of FL. It was also sporadically detected in the upper Midwest during years when conditions were ideal.

Another question regarding this current resurgence involves whether or not the female flies of this species have gained some sort of new ability to " sus out " the sterilized males released and now avoid them..  That would destroy the current means of effective control of course.  Maybe a vaguely rumoured strain of the species that was rumoured to possess some resistance to radiation, that is spreading into new areas is responsible?? ..Time will tell...


Regardless, putting this out there as a " Keep your eyes -and ears- on this situation over the coming months " kind of  advise, rather than a " The sky is about to fall " alarm.  Understand the difference..



Highly doubt this fly will return to the US  -in any great numbers at least- but,  We'll have to see since  -so far- the extra aggressive response to this current situation isn't seeming to have much effect.. That said, ..as was the case in the past when the battle began, full, regional control can take up to several years..

In that time, reports of sporadic, localized outbreaks aren't completely out of the question further north in Mexico, and / or possibly in FL. again, and perhaps the border regions of Texas / other states, depending on what weather events occur..  It is thought that the outbreak seen in FL. was a result of flies being blown north from Cuba by a Hurricane.  Should such occur, it wouldn't be out of the question that the occasional sterilized fly turns up in someone's yard.

Won't post it here but there is a really good observation on iNaturaliust that details the trademark markings of adult NWS flies, ...as compared to the ..roughly, 4 or 5 other species of similar looking fly species that are common in the US,  None of which cause the same issues as NWS.

One significant step has apparently been made in that the US has now suspended all imports of Cattle from Mexico. I don't doubt restrictions on the importation / movement of other livestock may occur if outbreaks expand north beyond far southern Mexico over the coming months.

Something to monitor casually,  but closely.. 


Related articles...  Will add more  when / if  need be..

*** As stated at the top,  .If gross things make ya' squirm,   turn away ***


Scientists built a great wall to keep out the ‘man devourer’ – but now it’s fighting back

https://www.cdc.gov/coca/hcp/trainings/resurgence-new-world-screwworm.html

https://u.osu.edu/beef/2024/11/27/cattle-imports-from-mexico-restricted-after-new-world-screwworm-detection/

https://publications.aap.org/aapnews/news/30599/Twice-eradicated-parasite-threatens-northward?autologincheck=redirected

Screw worms and bot fly larva.  Two things I don’t need around the yard.  I go outside and work for hours at a time til sun set, getting bit by tombs of mosquitos all day long.  I don’t wear bug spray or react to the bites anymore.  It just leaves a flat tiny red dot with no itching.   Horse flies and deer flies are annoying, but a can’t imagine having to worry about this.  Tropical worms please stay in the tropics.  

IMG_0489.jpeg.0a8b8072c7f23928d82a145bff0d1e8c.jpeg

 

I used to remove bot fly larva from our animals growing up on a mini farm.  It was rare, bit memorable.   You’d occasionally see sick, small mammals, like deer mice, with them hunting or fishing.  I can’t imagine screw worms.   That’s a whole other level with a lot of impact on farming.  
IMG_0490.thumb.webp.e2adc7385efcf7c9653be0a293b56de2.webp

 

  • 3 months later...
  • Author

A quick update on the NWSW situation in Mexico and Central America as we head into the warm season...

As thought, despite the battles being waged against it down there over the past few months, positive detections continued to increase thru the winter months, with numerous newer detections made in southern Mexico, more in nearby Belize, Honduras, and El Salvador.

At the same time, the USDA resumed cattle / other livestock imports from Mexico back in January.

According to the latest info from the USDA, it appears two near SIT ( Sterile Insect Technique ) facilities will be set up somewhere in southern Mexico over the next few months, north of where the most recent confirmed detections have been made..  Will have to wait and see whether or not they'll be up and dispersing sterile flies before fertile flies manage to move north of where these facilities are planned for.

With that said, as mentioned before, and esp. in light of recent developments,  don't rule out sterile flies being sighted near or just north of the Mexico / U.S. border,  perhaps in S. FL. if blown north, beyond where the planned releases are by any hurricane that tracks across the western Gulf of Mexico / toward the us from the Yucatan later on this year..

A current map of positive detections, via APHIS / USDA.  COPEG's map is greatly outdated..


Screenshot2025-03-21at18-33-54NewWorldScrewwormOutbreakinCentralAmerica.png.b4f10c66b3bb5590c7055740c79d5daf.png

While it doesn't mention exactly where they'll be set up, a related article mentioning the USDA working with Mexico and COPEG to set up the new rearing facilities..  I'm sure more information will come out over the coming months. 
https://www.aphis.usda.gov/news/program-update/establishing-new-world-screwworm-sterile-fly-barrier-zone-mexico-prevent


Will be watching to see if any detections start showing up in northern Veracruz, Yucatan and Quintana Roo, and along the Pacific coast in Southern Oaxaca. ..Let alone anywhere further  north / west of that part of Mexico. < Hopefully not >

As a side note, Came across this  
https://pmc.ncbi.nlm.nih.gov/articles/PMC7789611/    interesting article discussing how while N.W. Screw Worm can infest Pigs, which obviously inc. feral hogs / wild Boar, they appear to suffer relatively minor effects and can be a significant means of dispersal that can go un-noticed, wild Boar esp. 

Think we're the only country w/ an extensive Boar issue?.. Well established problem in both Mexico and the rest of Central / South America as well.

Will check in on this again sometime in May.

  • 2 months later...
  • Author

June  / start of summer 2025 NWSW update:

Once again, as thought might occur as spring warmth / start to the rainy season in S. Mexico gets underway, Positive NWSW detections have reached the southern end of the Mexican Plateau / further north into Veracruz..  ...as of the dates of the last map update below..


Screenshot2025-06-04at14-09-14NewWorldScrewwormOutbreakinCentralAmerica.png.0e23427aa498b6788985c4ba35f377ea.png

Screenshot2025-06-04at14-08-21nws-detections-by-country-with-ports.png(PNGImage23301714pixels)Scaled(37).png.7ce98fc96590b0cbb5aa48128ea0ea8c.png


Possible  *** But  NOT  confirmed  / yet reported ****   there have been detections further north ( Up on / along either side of the Plateau ) / east ( Yucatan Pen. ) of those listed currently. 


While the " confirmed / logged confirmed " detections are still quite a distance from the U.S., they are close enough ( within 700 miles ) that the USDA shut down all livestock imports into the U.S. from Mexico for the time being. ....And anyone involved in the livestock end of the AG. industry here in the U.S. are on elevated  notice to watch for any possible cases.  Stepped up urgency regarding reactivation of former / starting new..  Sterile Fly facilities in Mexico,  and possibly the U.S. ( Texas = Being discussed currently ) 


While NWSW is not present in northern Mexico right now,  article link  below mentions the  slim ( atm ) but reasonable possibility that flies could reach the border region, ..TX end esp.     by late summer or early fall    ..if...  Emphasize IF   everything that could hasten it's spread north were to come together. 

Note too how quickly they spread across Central America when this latest breakout began on the 2nd map above. 


https://www.abqjournal.com/news/article_873fb5dc-f79b-461a-bd23-4b78fb0c7e3c.html

Hopefully that doesn't happen but,   ..it's enough of a potential that ..everyone.. whether involved in raising livestock, or pet owners..

....Time to start educating yourselves on this serious threat.. ..No matter how gross the research into it might be to the easily squeamish...  


Should Texas decide to get a Sterile Fly facility up and going / Mexico does the same in any of the border states over the next few months, Flies may be seen as batches of them are released in preemptive target areas along the border, or nearby. 


Next update: Start of July.. 

  • 1 month later...
  • Author

August 1st check in... after skipping July..

As thought, confirmed detections continue to inch further north...   How much further north could they get before October??? ..That's the big question atm.. and no, while both Mexico and Texas are in the process of ramping up their Sterile Fly facilities, neither will be operational before we reach -at least- November  ..If not until sometime in 2026. 


Aside from flies being spread around via livestock movement, NWSW is now well within where wild Boar are fairly common in Mexico. 

While all wildlife is capable of moving NWSW to new areas,  it is wild Boar ..and native Javalina.. which can move long distances quite easily, and are skilled at avoiding capture that i myself are most concerned about at this time.. 



Screenshot2025-07-31at14-19-03NewWorldScrewwormOutbreakinCentralAmerica.png.0ed50a47fccad249ccab04ae78a0bc44.png


On the map above,  i included some chicken scratch to sorta outline what to keep an eye on over the next 2-3 months..

#1: Where the latest confirmed detections have been recorded.  Also includes a " plausible " area where sightings / outbreaks may be occurring in wildlife / livestock,  but haven't been reported..  Lots of extremely remote, very rugged terrain in that part of Mexico which = high likelyhood of screw worm issues occurring " under the radar "  ** thoughts on that specific aspect are my own. Is not an "official" suggestion **



#2:  ...IF...  things continue to progress as they have so far, #2 outlines the most likely area of Mexico for new reports, outside of area 1 by mid / late September, esp. on the eastern side of Mex... 



#3:  the northern-most " possible " positive detection report(s)  outcome boundary by October..   esp. if hurricane season ramps up and that side of the Gulf sees the brunt of any storms over the next 2-3 months..  Depending on the weather during that time, you could extend the " possible detection area " in S. TX a little further north..  Warmer / wetter? = perfect conditions for further spread..



#4: While the SIT program did successfully push it south of Panama,  NWSW issues have remained endemic / sporadic in Cuba and some of the Caribbean islands since the species was first encountered / named.

SIT elimination campaigns have garnered some success in the Caribbean, but haven't yet completely eliminated it. 

 It is thought that Cuba  ..or one of the nearby islands..  was the source region of the last U.S. outbreak that occurred in the FL. Keys / Homestead area back in 2016..  Flies are thought to have been swept north, into the Keys by one of the Hurricanes that passed over both areas, before reports started to occur ( ..in the Keys )



#5:  Because detections continue to increase across the Yucatan section of Mexico, it is possible that flies from this latest surge on the continent successfully land on Cuba,  and/or other nearby islands   and mix genes with flies there.. 

...If that did occur, and a super-charged surge started to spread rapidly across Cuba, then southern FL. would be under threat once again, under the same kind of circumstances that moved flies to the keys during the 2016 outbreak.. ( #6 )   Obviously, like any other critter,  flies could hitch a ride on a boat passing between Cuba and Key West too..






Overall, next 3 months = keeping a close eye on/ fingers crossed.    Beyond that?  We'll have to wait and see how things are looking as we head into this winter.. 

Abnormally cold weather in Cen / Southern Texas / the southeast  beat back NWSW surges a few times in the past when the fly was present in the U.S. before the SIT program began. 

Beyond that?  if in S. TX?  do some research on a product called Swormlure-5.  Appears the Ag dept there will be using it again to catch any early signs the flies have arrived in the state. 

Nasty as it is, rotting Liver set in traps attracts them too..


...Unless something major occurs before, We'll see how things are looking next month. 

  • 7 months later...
  • Author

With the return of Spring comes the un avoidable update on the current status of the on -going NWSW resurgence across Mexico..

Last Fall, and over the winter,  active cases continued to slowly inch further north and,  in a few cases,  came quite close to the South TX border.  There are none at the current time in that area however..  Not too far away though. 


Screenshot2026-03-14at08-54-46CurrentStatusofNewWorldScrewwormScrewworm_gov.thumb.png.63d3e2337ef46133d23f18c63b202c83.png

That said, as you can see, active case incidents have spread into more areas of Mexico, inc some areas up on the Plateau.. 

There was also another scare in FL after APHIS inspectors noted a Screw Worm infestation on a horse, being brought into the state from Argentina, during a routine examination during the quarantine phase of inspection before allowing it to enter the state / U.S.. 

*** To be clear,  issue was noted in a USDA quarantine facility in S. FL rather than after passing / being released from  quarantine.   Animal itself was sent back to Argentina after being treated.

As much as some may not have wanted to see cold weather in the south / FL this year, that factor may have kept NWSW from crossing the MEX / TX border,  ...at least temporarily...

Now that it is spring, and there is nothing but months of warmer weather ahead ..we'll just have to see what happens down there,  ..let alone how far north and west new case incidents manage to spread heading into the next several months.. 

Colors on the map represent the current ( green ) boundary < of active case detections >,  most likely ( yellow ) to less likely ( Any area north or west of the Red line ) possible scenarios that could occur this year.. 

That said, what happens with the rainy season across Mexico this year,  esp. once in the northern / western states as we reach Summer,  will dictate " favorable vs less favorable " continued dispersal / establishment conditions.

 

As you can see in the map above,  since the current S.I. dispersal polygon area includes the far southern corner of TX atm,  don't be shocked to see these flies turn up in a yard somewhere down there..  Since these are sterile, they can't reproduce ..so they pose no threat..   That said, it is impossible to tell sterile from non sterile so    ..Start hearing about active case detections down there?,  that will mean reproducing adult flies have reached the area.

Mexico's new S.I. production / dispersal site appears to be nearing completion ..within the next few months..  Unfortunately,  the one slated to be opened in S. TX will  likely not ready until some time in 2027.. 

More later, if  -or when-  needed...

  • 4 weeks later...
  • Author

Start of April update:

Screenshot2026-04-08at15-39-19CurrentStatusofNewWorldScrewwormScrewworm_gov.thumb.png.813ace81cb57226f4650e54929d5c693.png


First " active " detection / observation in Nayarit,  decent jump in cases / detections across most areas,  inc. ALL states that border the Pacific, south of Jalisco.  Firmly re- established in both Oaxaca and Chiapas.

While monitoring all areas,  area within the Orange line: = Where i'll be watching closely for -any-  new detections thru the month / as we start May..  Encompasses the extremely rugged and remote bulk of the Sierra Madre Occidental,  AG -dense Coastal plains region of both Sinaloa and southern Sonora,  and, less likely,  for now at least,  southern tip of Baja Sur..


 

  • 3 weeks later...
  • Author

End of April update:

Screenshot2026-04-28at15-21-38CurrentStatusofNewWorldScrewwormScrewworm_gov.thumb.png.b3956aefa2aaad3b280440c83cc4b5d3.png

New detections thru April in:  Zacatecas,   New detections, as of this week,   in Cuidad De Mexico, and TLaxcala..

Continued increase in confirmed cases in all other currently effected states..

Blue:   Most likely area for new detections thru  -at the earliest-  mid May.     Anticipate seeing detections in far southern Durango,  Aguascalientes,  and Coahuila. 

** Blue line  on the TX / U.S. side represents where U.S. detections are likely  should the increasing levels of detections continue and spread closer to /north of the border from both Tamaulipas and Nuevo Leon over the next few weeks. 

Dark Green:   Where new detections will likely occur by the start of June ..or shortly after,  ..if the trend being seen currently
continues, esp. on the west side of Mex. ( thru a majority of Sinaloa )..




Lighter Green: = where we could be by June 15th..



Areas in Yellow: = where we could see detections appear by the start of Monsoon Season on June 15th    ..or shortly afterwards.. ....depending on what happens w/ any tropical systems that may form in the E. Pac after May 15th and into the first half of June,  and how much moisture those systems bring to those areas of Mex,  Esp. in S. Sonora.. 

The wetter these areas start trending going forward,  if they do,  the more ideal of conditions for appearance and establishment. 




 

  • 1 month later...
  • Author

June update:

As expected, highly favorable conditions for dispersal and establishment throughout May = continued northward / westward advance..

Most recent active case detected just 25 miles south of the Mex / TX border in Coahulia, Which follows another detection 31 miles south of the border a few days before the most recent, with cases exploding elsewhere, and new < and increasing > confirmed detections in both Zacatecas and Aguascalientes.


https://www.reuters.com/business/healthcare-pharmaceuticals/flesh-eating-screwworm-detected-25-miles-us-border-mexico-usda-says-2026-06-02/

Screenshot 2026-06-02 at 14-50-03 Current Status of New World Screwworm Screwworm.gov.png



Looking into the month ahead? ..Considering how far these flies can disperse after pupal emergence, aprox 60 -90 miles, i won't be surprised to hear of wild specimens being spotted either along ..or just north of... the Rio Grande over the next 2 or 3 weeks. Really no way to avoid that at this point, esp with total detections / cases closing in on the 1K mark in Tamaulipas State.

For now, Chihuahua Durango, Sinaloa and Sonora states are in the clear.. How long that lasts? ..We'll have to watch and see ..Eastern Chihuahua, southern Durango, and Sinaloa esp.

Conditions are pretty favorable for westward dispersal into Chihuahua atm, and with the rainy season starting to advance northwest thru Mexico thru the month, will become more favorable further west..

Using Google Maps:

mexico southwestern us google map.jpg

Lipstick Pink -y Red Line: = States within Mex. with active cases / detections thru today...


If things follow the pattern they already have, i'd expect to see cases pop up in ..at least.. eastern Chihuahua, and /or far southern Durango soon < Inside the Light Green line on the map >

with that said, NOW is the time to start watching for flies / talking with anyone connected to the Ag or veterinary side of things about monitoring / traps, and / or any options regarding treatments ..if necessary... inside the Red line in TX. ..Esp. If you haven't started already..


As mentioned, now that detections have been made within 40miles of the border, that puts all areas of S. TX within 60 -80 miles of the river in the hot / " easily dispersed into " zone.. Imagine those areas are already seeing sterilized flies since they lie inside the S.I. dispersal polygons set up atm.



Orange represents max. dispersal potential range under the most optimal conditions *** See the linked article for that info ***

Dark Green represents where i think things get active next, perhaps quickly.. Mainly due to the Monsoon ramping up..

Considering the rainy season across our section of Mex. is expected to be wet, ..with the likelyhood of an active / highly?? active Hurricane season on this side of Mex., i won't be surprised to start to see cases showing up the Sierra Madre Occidental ..and in near -coastal elevation areas nearby, esp. in Sinaloa... by the end of the month ..or shortly after..

Should that occur, ..and should that occur rather quickly, Areas in the light blue line would be under threat next, ..beyond the start of July, followed by areas inside the Purple line, which includes areas just outside Phoenix.. How? / Why?

..Again, look at the article and what the " Optimal Conditions " are for continued advance. ..Add that to the section discussing how the Monsoon itself can influence dispersal / what conditions are not favorable during the warmer months, then think about which areas of AZ and western N.M, outside the borderlands, would be most ideal for dispersal / establishment.



Purple circle across Baja Sur = where flies spread via Hurricane - assisted dispersal could turn up, under the right conditions..



Yellow line #1: Areas of TX where you're going to have to keep a close eye on what is occurring in S. TX..

Yellow line #2: Same idea, just in our part of the country. ..For the moment, late season dispersal / detection potential is less likely here than in TX, but, ..all will depend on how things go with the Monsoon / Tropically - influenced surge events we may see, ...possibly frequently.. this summer / fall ...and yes, this does include parts of S. Cal..


How likely is that scenario? quite low.. but not 0 either..

Linked article discussing dispersal biology ..and one of the few positives regarding cold winters:

https://www.drovers.com/news/industry/winter-secret-slowing-spread-screwworm




Essentially, as things look right now, There really isn't any way around these turning up somewhere between S. TX and closer to AZ / N.M. let alone the real possibility of being detected close enough on the Mex. mainland to be blown across / hitch a ride on a ferry across the gulf and onto Baja before winter approaches.

As gross as it might be to do so, suck it up and learn the differences between these flies / their larvae / resultant issues during an infestation, and the equally as unpleasant ...but far less threatening... " look - a - likes " ( IE: Secondary Screw Worm / Latrine Flies / Green and Blue Bottle Flies, etc. )

If you see -any- flies, and / or note domestic / wild animals showing any signs of being affected by them, report it to local officials immediately..


More later....

  • Author

>

On 6/2/2026 at 4:12 PM, Silas_Sancona said:

Looking into the month ahead? ..Considering how far these flies can disperse after pupal emergence, aprox 60 -90 miles, i won' t be surprised to hear of wild specimens being spotted either along ..or just north of... the Rio Grande over the next 2 or 3 weeks. Really no way to avoid that at this point, esp with total detections / cases closing in on the 1K mark in Tamaulipas State.


Scrap the 2 - 3 week timeframe, As of this morning, New World Screw Worm is back in the U.S.

https://www.tdtnews.com/news/nation_world/article_c9c6ca8b-0544-5492-9ebf-cae1dc7c50a2.html


Aside from it's brief reappearance in the Keys / Homestead area back in 2016, and incidents connected to people who'd traveled to regions within Central or South America where the fly has hung on /is still endemic < South America >, it has been quite some time since it has been seen in the rest of the U.S.


Currently affected area in TX...

screw worm detection  US google map.jpg


While the immediate quarantine zone is a mere 12 miles, anyone living within 60 miles of La Pryor TX should be on alert for affected wildlife / Livestock they may encounter..

Of note from the above article, while our current, < " supposed " > USDA Ag person states that the fly can't move on it's own, needing to be " transported " to get around. ....This is a horribly FALSE statement. Don't buy into her " thoughts " as fact.


** While both legal and illegal transportation of livestock certainly has not helped in lessening how quickly flies can be moved into new areas, animal biology is simple.. Ideal conditions = faster natural dispersal.. No human aid needed.



** Considering all MEX / U.S. boarder Ag entry ports are closed to livestock movement ..on top of heightened, very careful inspection of -any- livestock that might be allowed through, any hint of a suspected case would immediately be spotted -before- any animal would cross into the U.S. ..This exact scenario occurred in FL a few months ago..


So, if this case turned out to be the result of "transported " livestock,< Always a possibility, ...but highly unlikely, btw, > how did it get through?? ..Who didn't do their job?

Thoughts for later i suppose..




Anyway..

Now that it's presence has been confirmed states -side, laser focus surveillance turns the two most obvious, non - livestock animal targets ...Deer, and Wild Boar / Feral Pigs ..Two animals that are quite common in TX, ...among other areas.

During the outbreak in the Keys back in 2016, Deer were the first animals that were spotted w/ Screwworm infestations / fly strike..

As noted elsewhere, Pigs ..which includes Boar.. pose a " silent " threat in that it was found they can carry larvae into new areas w/ out suffering the devastating damage that other animals do once affected.

Considering the epidemic level of Wild Boar in TX, this is a big concern to be watched closely. Wild Boar numbers were much lower ..if they were even present at all.. during the years Screwworm was present decades ago.



As mentioned the other day, NOW is the time to monitor. Considering how close to San Antonio this detection is, i'd say anyone living within the Orange area i'd laid out on Tuesday should keep an eye out ..and on the news..

Will post the Thursday map update, once it is out..

On 6/2/2026 at 4:12 PM, Silas_Sancona said:

If you see -any- flies, and / or note domestic / wild animals showing any signs of fly strike < the technical term used for this kind of infestation >, report it to local officials .....immediately..


More later....

  • Author

In LESS than a week since the first confirmed U.S. detection, we now have 3 more in TX.

#2 occurred on Friday and was found near La Pryor,

screwworm 2 and 3.jpg



#'s 3 and 4 were announced this morning..

One in La Salle Co, east of La Pryor / Zavala County.. ( Yellow circle on the map above )




4th was encountered in Andrews County, aprox 98 Miles west of Carlsbad, N.M. ...or 44miles southeast of Hobbs ( N.M. ) ..and roughly 283 miles northwest of La Pryor..

screwworm 4.jpg



Some changes to last week's map, due to these developments:

screwworm map2.jpg

Anyone inside the Blue line = Where the next detections could turn up, esp in Southeastern N.M., and far W. TX.. Monitor livestock and Pets closely..

Expanding the area within the Orange line.. Keep a close eye on all livestock, pets, and wild animals encountered, esp. Deer, Wild / Feral Pigs, and Javalina, ...where they occur..

Yellow Line = Pretty much all of TX / Anywhere east of Albuquerque on the Plains side of N.M. Start monitoring..


**** As a sidenote, USDA set up a states -side map to track active cases. As of 12:00PM MST, it has not been updated to include the newest detections in LaSalle and Andrews Counties.. ***

Link: https://www.aphis.usda.gov/animals/animal-health/livestock-and-poultry-disease/current-status/us-confirmed-cases-new-world?fbclid=IwZXh0bgNhZW0CMTEAc3J0YwZhcHBfaWQKNjYyODU2ODM3OQABHjyc7o1Ve8MPNpL8VVZdGxjoQBzIMNP2e1Ic-VqtqTQCsCbA9eigpHqcfmSa_aem_xfPF15NR_uDLlbJ-NqGOZg


More later..

  • Author

Quick update / edit:

**** Case documented in Andrews Co. TX has been reassigned to Lea Co, N.M. (
See USDA update / correction below ) marking the first case detection in New Mexico.


https://www.aphis.usda.gov/news/agency-announcements/usda-confirms-first-case-new-world-screwworm-dog-lea-county-new-mexico

An additional potential case is being evaluated in Gillespie Co. Texas.

  • Author

Tuesday Update:

** First detection / active case in Durango State, 3 states ( in Mexico ) close to crossing the 1,000 total cases threshold..

Screenshot 2026-06-09 at 14-53-55 Current Status of New World Screwworm Screwworm.gov.png


States -side map. 6 cases, as of yesterday..


Screenshot 2026-06-09 at 15-00-55 Confirmed Detections of New World Screwworm Animal and Plant Health Inspection Service.png

On 6/4/2026 at 5:01 PM, Silas_Sancona said:


Of note from the above article, while our current, < " supposed " > USDA Ag person states that the fly can't move on it's own, needing to be " transported " to get around. ....This is a horribly FALSE statement. Don't buy into her " thoughts " as fact.

Can't flies... you know... fly?

Keith 

Palmetto, Florida (10a) and Tampa, Florida (9b/10a)

  • Author
36 minutes ago, Zeeth said:

Can't flies... you know... fly?

Naah, lol.. these are special, bougie flies, needing someone to take them places.. ..Cuz' flying somewhere, on your own, is too hard ya know /s.. rolleyes


As far as the rest of ..recent statements regarding the whole situation ..I saw this coming as soon as cases started rising across Central America.

Unfortunate, and isn't going to help things at all but ..Popcorn is in hand, shaking my head while watching the " blame game show " get going.

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