Month: August 2026

The U.S. outbreak continued to expand during the past week, especially in Texas. The most defensible official written count today is from the Texas Animal Health Commission: 10 Texas counties with confirmed cases and 18 Texas premises with cases, up from 8 counties and 13 premises at the June 23 update. TAHC also lists a broader quarantine/infested-zone footprint in parts of 21 Texas counties, but those are not all confirmed-case counties. (Texas Animal Health Commission)

The latest CDC situation summary I found is still dated June 23, reporting 16 domestically acquired U.S. animal cases as of June 22 and no locally acquired U.S. human cases; CDC points readers to screwworm.gov for newer animal case data. (CDC) USDA’s current-status page was updated June 29, but its static text points to a dynamic dashboard for U.S. confirmed detections; the row-level dashboard data were not fully available in the page text. (APHIS)

Newly confirmed U.S. animal detections since June 23

Confirmed in official TAHC written orders

Supplemental media/dashboard-reported items
Farm Progress reported that USDA confirmed three additional Terrell County cattle cases on June 23, bringing the U.S. total to 19 cases as of June 24. I would treat this as supplemental until verified directly against the USDA dashboard, because the static USDA page does not expose the full dashboard table. (Farm Progress)

A local Midland report later described 20 U.S. cases according to USDA, but I would not use that number as the main published count without direct dashboard verification. (Midland Reporter-Telegram)

Current U.S. status

Texas quarantine / movement restrictions

TAHC now lists quarantine/infested-zone areas in parts of Bandera, Coke, Crockett, Edwards, Gillespie, Jim Hogg, Kerr, Kimble, La Salle, Medina, Pecos, Schleicher, Starr, Sutton, Terrell, Tom Green, Uvalde, Val Verde, Webb, Zapata, and Zavala counties. This is broader than the confirmed-case county list. (Texas Animal Health Commission)

TAHC states that warm-blooded animals in an infested zone may not move out without prior authorization; animals must be inspected, treated as required, and issued movement documentation. Hides, carcasses, and animal parts capable of serving as hosts must also be inspected and treated if required before removal from the zone. (Texas Animal Health Commission)

USDA’s current-status page also says all southern ports of entry are currently closed to livestock trade. (APHIS) Canada has suspended export of several live-animal categories from Texas, including equids, swine, cattle/bison/water buffalo, sheep/goats, cervids, and camelids. (APHIS)

Mexico status and trend

The trend remains active northward risk, but the near-border picture may have improved slightly since last week. USDA’s current-status page says Mexico maps are updated Tuesdays/Thursdays and near-border case lists within 100 miles are updated each business day; USDA also states that the sterile insect release polygon is adjusted based on science and modeling to maintain suppression and prevent spread. (APHIS)

Supplemental reporting from Farm Progress said SENASICA’s latest report showed 1,810 active cases in Mexico, while USDA data showed 43 cases within 100 miles of the U.S. border, down from 62 near-border detections reported June 18. Because this figure was reported secondarily and not visible in static SENASICA text during this review, I would cite it as a supplemental snapshot, not the official final count. (Farm Progress)

A major control development: Reuters reported that the U.S. and Mexico inaugurated a $50 million sterile-fly production plant in Metapa de Domínguez, Chiapas, expected to produce up to 100 million sterile flies weekly, roughly doubling output from the Panama-based COPEG plant. Reuters also reported more than 30,000 animals affected in Mexico in the current outbreak context. (Reuters)

Central America / Panama status

COPEG’s public site was updated with epidemiological week 24 of 2026, covering data through June 20, 2026. It reports 561 new cases, 68,665 cumulative cases since the start of the outbreak, and 34 weekly dispersal flights. COPEG lists affected species including 59,118 bovines, 3,304 canines, 2,286 swine, 1,657 equines, 1,394 sheep, 345 goats, and 326 humans. (COPEG)

COPEG states that the pest remains in the eradication phase in Panama, with positive cases in all Panamanian provinces except Guna Yala, and regional cases in Costa Rica, Nicaragua, Honduras, Guatemala, El Salvador, Belize, and Mexico. (COPEG)

USDA/APHIS control actions

USDA’s current-status page emphasizes the U.S. confirmed-detections dashboard, immediate reporting of suspicious wounds/maggots, trade restrictions, port closures, and sterile-insect release adjustments in Mexico and along the border. (APHIS) USDA’s confirmed-detections page says the dashboard captures individual animal cases by county/state, animal type/species, confirmation date, and active/inactive status, plus wild-fly detections where available. (APHIS)

TAHC states that federal and state partners are working jointly in infested zones on animal/fly surveillance, epidemiologic investigations, and response protocols. (Texas Animal Health Commission) TAHC and Texas A&M AgriLife have also created a New World Screwworm Certified Inspector Program to train and certify personnel to inspect animals and issue NWS treatment/movement certificates. (Texas Animal Health Commission)

Changes since June 23

The main changes are:

1. Texas expanded from 8 to 10 confirmed-case counties and from 13 to 18 premises with cases, per TAHC. (Texas Animal Health Commission)
2. New confirmed-case counties include Medina and Jim Hogg, based on TAHC orders. (Texas Animal Health Commission)
3. Additional detections occurred in Crockett and Edwards counties, including sheep and bovine detections. (Texas Animal Health Commission)
4. The quarantine footprint expanded to parts of 21 Texas counties, but those are not all confirmed-case counties. (Texas Animal Health Commission)
5. The regional sterile-fly response expanded, with the new Chiapas sterile-fly facility reported by Reuters as a major U.S.–Mexico capacity increase. (Reuters)
6. Human status did not worsen: CDC still reports no locally acquired U.S. human cases. (CDC)

Practical implications

For veterinarians, the priority is rapid recognition, proper larval collection, reporting, treatment, and movement documentation. The expansion into new Texas counties means clinicians should maintain suspicion beyond the original south Texas focus.

For livestock owners, daily wound checks remain essential, especially after calving, castration, dehorning, shearing, branding, and traumatic wounds. The recent detections in bovines, sheep, and goats underscore that routine livestock wounds are the highest-risk entry points.

For pet owners, New Mexico’s dog case remains a reminder that pets can be affected, but the known New Mexico case is now recovered/inactive. Owners in or near affected zones should inspect pets for nonhealing, draining, painful, or foul-smelling wounds. (screwwormnm.org)

For public health, the U.S. situation remains primarily animal-health/agricultural. CDC’s current message is that U.S. public risk remains very low and localized to areas where animal cases have been reported. (CDC)

For entomologists, the key issue is differentiating animal infestations from evidence of wild-fly activity. USDA’s dashboard is designed to track both animal cases and wild-fly detections, but the static page does not expose the row-level wild-fly data. (APHIS)

Uncertainties and discrepancies

The biggest uncertainty is the individual animal case count as of June 29. TAHC gives a strong official summary: 10 Texas counties and 18 premises with cases. But the USDA individual-animal dashboard is dynamic, and the static page does not show all rows. For publication, I would use the TAHC county/premises count as the official written count and treat media-reported individual totals as supplemental unless you manually verify the USDA dashboard. (Texas Animal Health Commission)

The second uncertainty is Mexico’s exact current active-case count. USDA points to SENASICA and updates its map/list on a schedule, but the static text does not expose all current Mexico data. Use exact active-case and near-border counts only after checking the current dashboard directly. (APHIS)

Map generated by ChatGPT using USDA, CDC, and state agency data. For full data sources, see the associated article.

The U.S. outbreak has continued to grow, but remains geographically concentrated. CDC’s June 23 update reports 16 domestically acquired U.S. animal cases as of June 22, with no locally acquired U.S. human cases. (CDC) Texas now reports 8 Texas counties with cases and 13 Texas premises with cases, up from 6 counties and 10 premises at our June 15 assessment. (Texas Animal Health Commission) New Mexico still reports one confirmed canine case in Lea County, now recovered/inactive. (Screwworm NM)

The most important new U.S. developments since June 15 are four additional confirmed Texas animal cases: one sheep/lamb in Crockett County, two cattle/calves in Edwards County, and one goat in Terrell County. The Terrell County goat was reportedly associated with a castration-site wound. (Farm Progress)

Newly confirmed U.S. animal cases since June 15

Current U.S. count: CDC reports 16 domestically acquired U.S. animal cases as of June 22. (CDC) Texas reports 8 counties with cases and 13 premises with cases. (Texas Animal Health Commission) New Mexico remains at one confirmed canine case in Lea County, now recovered/inactive. (Screwworm NM)

A minor discrepancy: Reuters reported on June 22 that three new Texas cases brought the U.S. total to 15; a later Farm Progress update and CDC’s June 23 page put the total at 16, apparently reflecting the additional Terrell County goat. (Reuters)

U.S. human cases

CDC’s June 23 situation summary says:

• No locally acquired U.S. human NWS cases have been reported.
• One prior travel-associated human case was confirmed in August 2025 in a person returning to the U.S. after travel to El Salvador.
• CDC continues to describe the current risk to the U.S. public and animals as very low, localized to areas where NWS cases have been reported. (CDC)

So the U.S. human status is unchanged from June 15: no confirmed locally acquired human cases.

Current U.S. case summary

Texas quarantine / infested-zone footprint: TAHC lists active quarantine in parts of Coke, Crockett, Edwards, Gillespie, Kerr, Kimble, La Salle, Pecos, Schleicher, Sutton, Terrell, Tom Green, Uvalde, Val Verde, Webb, and Zavala counties. Important: these are infested-zone/quarantine counties, not necessarily all confirmed-case counties. (Texas Animal Health Commission)

Mexico status and trend

The Mexico picture remains one of ongoing northward pressure with some possible reduction in total active cases, but the data are harder to extract cleanly from official dashboards than the U.S. data.

USDA’s current-status page says the Mexico map is updated Tuesdays and Thursdays at 5 p.m. ET, while detections within 100 miles are updated each business day. USDA also states that the sterile-insect release area/polygon is adjusted as needed “to maintain broad suppression and help prevent the pest from spreading to new areas.” (APHIS) USDA notes that SENASICA considers a case active at diagnosis and revisits it after 15 days to determine whether it should become inactive. (APHIS)

Supplemental reporting says Mexico had about 1,785 active cases, down by 136 from the previous report, but that cases within 100 miles of the U.S. border increased from 50 to 62 as of June 18. I would treat those as secondary-reporting figures until checked directly against the SENASICA/USDA dashboards before publication. (Farm Progress) Texas Tribune also reports nearly 28,000 detected cases in Mexico since November 2024, citing Mexican officials. (The Texas Tribune)

Interpretation: Mexico may be reducing some active-case burden overall, but the rise in near-border detections is the more important U.S.-risk signal.

Central America / Panama status

CDC reports that Central American countries and Mexico have reported more than 185,000 animal cases and 2,175 human cases in the current outbreak. (CDC) CDC also reiterates that the outbreak began in Panama and Costa Rica in 2023 and subsequently spread through Central America and Mexico. (CDC)

COPEG’s public page still appears less current than the U.S. pages. It displays data through epidemiological week 19, ending May 16, 2026, with 488 new cases, 66,061 cumulative cases since the start of the outbreak, and 34 weekly dispersal flights. It also says Panama had positive cases in all provinces except Guna Yala, and regional cases in Costa Rica, Nicaragua, Honduras, Guatemala, El Salvador, Belize, and Mexico. (COPEG)

COPEG’s visible page also states dispersal operations in Mexico and the United States, specifically Tapachula and Tuxtla, Mexico, but because the displayed statistics are over a month old, I would not use them as the current Central America count without checking COPEG’s most recent bulletin or dashboard manually. (COPEG)

USDA/APHIS control actions

USDA’s current-status page, last modified June 22, says APHIS maintains a dashboard of U.S. confirmed animal and wild-fly detections, capturing animal cases by county/state, animal type/species, confirmation date, and active/inactive status. It also tracks fly traps with at least one wild NWS fly detected. (APHIS)

Response actions include:

• Sterile fly releases in affected areas and adjusted release polygons in Mexico/U.S. border regions. (APHIS)
• Animal movement controls and surveillance. CDC describes USDA’s response strategy as including sterile flies, animal movement controls, surveillance, and outreach/education. (CDC)
• Expanded diagnostics capacity: APHIS deployed an NVSL entomologist to the USDA research lab in Kerrville and set up a mobile animal disease laboratory in Texas to allow faster initial confirmations. (Farm Progress)
• Large research investment: USDA announced about $105 million for 40 projects to strengthen detection, control, eradication tools, sterile-fly production, traps/lures, therapeutics, ecological modeling, wildlife surveillance, and response capacity. (APHIS)
• Pet-treatment support: FDA issued a June 11 EUA for generic nitenpyram tablets to treat NWS myiasis in dogs/cats meeting weight/age criteria; FDA notes this kills most larvae within hours but does not prevent reinfestation and does not replace veterinary wound care/removal of remaining larvae. (U.S. Food and Drug Administration)

Trade and movement restrictions

USDA says all southern ports of entry are currently closed to livestock trade. (APHIS) Texas movement controls remain significant: warm-blooded animals in a Texas infested zone may not move out without prior TAHC authorization, inspection, treatment documentation, and a movement certificate. (Texas Animal Health Commission)

New Mexico created a 12-mile infested zone around the Lea County dog case after confirmation, requiring inspection and treatment as needed prior to animal movement; the state also issued an emergency animal-health declaration on June 9. (Sierra County Government) New Mexico’s current status page says that dog has recovered and the case has transitioned from active to inactive. (Screwworm NM)

Practical implications

For veterinarians, the key issue is not just treatment but documentation and reporting. USDA is emphasizing confirmed detections only; Farm Progress quotes USDA saying many suspected reports are under investigation and that only confirmed detections are reported to avoid confusion and trade consequences. (Farm Progress)

For livestock owners, the practical message is daily wound surveillance. TAHC specifically recommends monitoring body openings such as the nose, ears, umbilicus, and genitalia, and watching for drainage, enlargement, maggots/larvae/eggs, and secondary infection. (Texas Animal Health Commission) The Terrell County goat case in a castration-site wound is a concrete reminder that ordinary management wounds are high-risk during active transmission. (Farm Progress)

For pet owners, national risk remains low, but pets in or recently exposed to affected areas should be checked for wounds. FDA’s nitenpyram EUA adds a treatment option for dogs and cats, but wound cleaning, larval removal, and veterinary care remain essential. (U.S. Food and Drug Administration)

For public health, the situation remains primarily veterinary/agricultural, not a U.S. human outbreak. CDC says no locally acquired U.S. human cases have been reported and that the current public risk is very low. (CDC)

For entomologists, the dashboard distinction between animal cases and wild-fly trap detections is important. If wild-fly detections increase, that would be stronger evidence of local reproductive activity than isolated animal cases alone. USDA’s dashboard explicitly tracks both categories. (APHIS)

What changed since June 15

1. U.S. count increased from roughly 12 to 16 domestically acquired animal cases by CDC’s June 23 update. (CDC)
2. Texas expanded from 6 counties/10 premises to 8 counties/13 premises with cases. (Texas Animal Health Commission)
3. New case counties include Crockett and Terrell, while Edwards had additional cattle/calf cases. (Farm Progress)
4. New sterile-fly dispersal flights were launched over newly impacted areas, including Crockett County; Edwards was already inside an affected area. (Farm Progress)
5. USDA announced $105 million for preparedness/response research and technology projects on June 16. (APHIS)
6. No U.S. human-status worsening: CDC still reports no locally acquired U.S. human cases. (CDC)

Uncertainties / discrepancies

The main discrepancy is 15 versus 16 U.S. cases. Reuters and some June 21–22 reporting gave 15 after the Crockett lamb and two Edwards calves. CDC’s June 23 update and Farm Progress’s June 23 report give 16, adding the Terrell County goat. For publication, I would use 16 as the current official public-health count, because CDC’s page is dated June 23 and references USDA APHIS. (Reuters)

The second uncertainty is the individual animal case list. USDA’s dashboard is the official location for individual animal cases, but its detailed rows are dynamic and not fully visible in the static text I could access. TAHC provides strong summary counts — 8 Texas counties and 13 premises — but not the full individual case table on the static page. (APHIS)

The third uncertainty is Mexico’s current active-case count. USDA points to SENASICA dashboards and says Mexico case maps/lists are updated frequently, but SENASICA’s official pages were not fully extractable in static text during this review. For your blog, I would manually check the USDA/SENASICA dashboards before publishing exact Mexico counts. Use the current secondary figures — 1,785 active cases and 62 within 100 miles of the U.S. border — only with clear attribution as supplemental reporting. (APHIS)

Map generated by ChatGPT using USDA, CDC, and state agency data. For full data sources, see the associated article.

Between June 8 and June 15, 2026, the U.S. situation has expanded materially. On June 8, the working count was approximately 5 confirmed U.S. animal cases: Texas calves/goat plus the reclassified New Mexico dog. Since then, official Texas/USDA sources show additional detections in La Salle, Zavala, Edwards, Tom Green, and Sutton counties, and Texas now reports 6 Texas counties with cases and 10 Texas premises with cases. A June 15 media summary citing the USDA detection dashboard reports 12 total U.S. confirmed cases: 11 in Texas and 1 in New Mexico, but because the APHIS dashboard itself is dynamic and not fully visible in the static page text, I would treat the official TAHC county/premises counts as the most defensible written count and the 12-case count as a dashboard/media-reported current count requiring dashboard confirmation before publication. (Texas Animal Health Commission)

There are still no confirmed locally acquired human infestations reported in the United States on CDC’s situation page. CDC continues to note one prior travel-associated human case in a person returning after travel to El Salvador. (CDC)

Newly confirmed U.S. animal cases since June 8

Confirmed / official written records

Current U.S. working count

The strongest official written source available in this search is TAHC, which says: 6 Texas counties with cases and 10 Texas premises with cases. It also lists quarantine/infested-zone counties including Coke, Edwards, Gillespie, Kerr, Kimble, La Salle, Schleicher, Sutton, Tom Green, Uvalde, Val Verde, Webb, and Zavala, though not all of those counties necessarily have confirmed cases; some are included because they fall within infested or surveillance zones. (Texas Animal Health Commission)

For a blog update, I would write: “As of June 15, official Texas records identify cases in six Texas counties and ten Texas premises; media reports citing USDA’s dynamic dashboard describe 12 total U.S. cases, including 11 in Texas and one in New Mexico. The dashboard count should be checked directly before final publication.” That wording is cautious and defensible.

Human cases in the United States

CDC’s current situation page still says no locally acquired human infestations have been reported in the United States. CDC also says one case was confirmed in August 2025 in a person who returned to the U.S. after travel to El Salvador. (CDC)

So for U.S. human status:

Mexico status and trend

USDA’s current-status page says Mexico case maps/lists for detections within 400 miles are updated Tuesdays and Thursdays at 5 p.m. ET, and cases within 100 miles are added each business day. USDA also says isolated detections outside known affected areas in Mexico are “not unexpected” and that rapid identification and response are evidence that the U.S.–Mexico NWS Action Plan is functioning. (APHIS)

The trend remains northward pressure with active containment, not stabilization. CDC states the outbreak that began in Panama and Costa Rica in 2023 has moved northward through Central America and Mexico. (CDC) SENASICA’s alert system reported on June 9 that Mexico temporarily suspended imports of live animals from the U.S. to preserve the zoosanitary status of Baja California, Baja California Sur, Chihuahua, Sinaloa, and Sonora, after confirmations in Texas and New Mexico. (SENASICA)

USDA says it continues to disperse 100 million sterile insects per week in Mexico and along the U.S.–Mexico border, adjusting the sterile-insect release polygon based on case locations and modeling. (APHIS)

Central America / Panama status

COPEG reports that NWS remains in the eradication phase, with positive cases in all provinces of Panama except Guna Yala, and regional cases reported in Costa Rica, Nicaragua, Honduras, Guatemala, El Salvador, Belize, and Mexico. (COPEG)

COPEG’s visible statistics are not as current as today; the page displays epidemiologic week 19, 2026, covering data through May 16, 2026. At that point, COPEG listed 488 new cases, 66,061 cumulative cases since the start of the outbreak, and 34 weekly dispersion flights, with dispersion operations noted for Tapachula and Tuxtla, Mexico. (COPEG)

A key operational detail: COPEG states that, because the outbreak spread beyond the old Panama barrier, a new biological barrier farther north became necessary, and sterile-fly dispersal in Panama was stopped starting in May 2024 to support the northward barrier strategy. (COPEG)

USDA/APHIS and state control actions

U.S. actions
USDA’s confirmed-detections page says APHIS and state partners are tracking individual animal cases by county/state, animal type/species, confirmation date, and status, and also tracking wild-fly detections by county/state and date. (APHIS)

USDA and TAHC response activities include epidemiologic investigations, case tracing, surveillance, testing, trapping, sterile-insect releases, and outreach to animal owners. (APHIS) TAHC states that federal and state partners are working jointly in infested zones on animal and fly surveillance, epidemiological investigations, and response protocols. (Texas Animal Health Commission)

Quarantine / movement controls
TAHC says a quarantine is in place for established NWS infested zones in parts of multiple Texas counties. Warm-blooded animals in an infested zone may not move out of the zone without prior TAHC authorization; animals must be inspected and treated as required, and hides, carcasses, and animal parts capable of serving as hosts require inspection/treatment before removal. (Texas Animal Health Commission)

USDA’s current-status page says all southern ports of entry are closed to livestock trade at this time. (APHIS) Mexico also suspended imports of live animals from the U.S. after U.S. detections in Texas and New Mexico. (SENASICA)

Treatment and pet-related update
FDA issued an Emergency Use Authorization on June 11, 2026 for generic nitenpyram tablets to treat NWS myiasis in dogs, puppies, cats, and kittens weighing at least two pounds and at least four weeks old. FDA says most U.S. dogs and cats remain at low risk, but risk is elevated for pets recently in areas with confirmed NWS cases. (U.S. Food and Drug Administration)

Summary of Changes since June 8

The significant changes since June 8 are:

1. U.S. case geography expanded. As of June 8, known confirmed U.S. cases were concentrated in Zavala, La Salle, Gillespie, and Lea County, NM. Since then, Texas detections have expanded to additional counties including Edwards, Tom Green, and Sutton, with TAHC reporting six Texas counties with cases. (Texas Animal Health Commission)
2. Case count increased. USDA announced on June 9 that a new La Salle County calf case brought the U.S. total to six at that time. By June 15, local reporting citing the USDA dashboard described 12 total U.S. cases, though I would verify the dashboard directly before using that number in a formal public-facing post. (APHIS)
3. Texas quarantine footprint expanded. TAHC now lists infested-zone quarantine areas across parts of 13 Texas counties, though some are zone counties rather than counties with confirmed cases. (Texas Animal Health Commission)
4. FDA added a pet-treatment tool. FDA authorized generic nitenpyram tablets for dogs/cats on June 11. (U.S. Food and Drug Administration)
5. Trade restrictions broadened. USDA southern livestock ports remain closed, and Mexico suspended importation of live animals from the U.S. to protect northern Mexican states. (APHIS)

Practical implications
For veterinarians, the immediate issue is fast recognition, proper larval collection/identification, reporting within state channels, and careful management of wounds in animals from or near infested zones. TAHC says suspected livestock cases should be reported to TAHC within 24 hours of suspicion. (Texas Animal Health Commission)

For livestock owners, daily wound surveillance is now a serious operational requirement in affected zones. TAHC advises monitoring animals for larvae/eggs, body-opening lesions, drainage, wound enlargement, and signs of secondary infection. (Texas Animal Health Commission)

For pet owners, the risk remains low nationally, but risk is higher for animals recently in affected areas or with open wounds. The new FDA nitenpyram EUA helps treatment access, but it does not replace veterinary wound care and larval removal when needed. (U.S. Food and Drug Administration)

For public health, the main message remains vigilance rather than alarm: CDC reports no locally acquired human infestations in the U.S., but clinicians should consider NWS in suspicious myiasis-like lesions, especially after exposure to affected areas. (CDC)

For entomologists, the priority is reliable species confirmation, trapping/surveillance, and careful separation of true NWS from other wound-associated flies. USDA’s dashboard explicitly tracks both animal cases and wild-fly detections, which will matter for determining whether the U.S. is seeing isolated animal infestations versus local fly activity. (APHIS)

Uncertainties and discrepancies

The biggest uncertainty is the exact current U.S. case count by individual animal, because USDA’s confirmed-detections dashboard is referenced as current but its tabular details were not fully visible in the static page text I could access. TAHC’s written page gives strong official counts for Texas counties and premises, while media reports citing the dashboard give a higher, more granular current count. (APHIS)

A second issue is terminology: “infested zone county” does not equal “county with confirmed cases.” TAHC lists quarantine zones that include neighboring or partially affected counties. Your blog map should distinguish case counties from quarantine/surveillance counties. (Texas Animal Health Commission)

A third issue is Mexico/Central America data freshness. COPEG’s visible statistics are through May 16, while USDA points to SENASICA and COPEG for current regional data but some of those data are dashboard-based or difficult to extract into static text. (COPEG)

Map generated by ChatGPT using USDA, CDC, and state agency data. For full data sources, see the associated article.

As of June 9, 2026, the important update is: New World screwworm has now been confirmed in the United States in the current outbreak. This is no longer just a “near the border” concern.

Current confirmed U.S. status
USDA/APHIS reports confirmed animal detections in Texas and New Mexico. The first U.S. animal case was confirmed on June 3, 2026, in a 3-week-old calf in Zavala County, Texas, with larvae in the umbilical area. (APHIS) A second calf case was confirmed on June 5, also in Zavala County, about 5.6 miles from the first case. (APHIS) On June 8, USDA confirmed additional cases including a calf in La Salle County, Texas, and initially reported a dog sample submitted from Andrews County, Texas; later the dog was reclassified as a Lea County, New Mexico case because that is where the dog lived. USDA also confirmed a goat in Gillespie County, Texas. (APHIS) (APHIS)

So, the practical count being reported now is five confirmed animal cases: four in Texas and one in New Mexico, though the situation is evolving and some early location reports were corrected. AP similarly summarized this as three calves and a goat in Texas, plus a dog in Lea County, New Mexico. (AP News)

Human status
CDC says no locally acquired human infestations have been reported in the United States as of its June 2026 update. CDC also notes one travel-associated human case was confirmed in August 2025 in a person returning to the U.S. after travel to El Salvador. (CDC)

Where the threat came from
This is part of the larger northward resurgence that began in Panama and Costa Rica in 2023, then spread through Central America and Mexico. CDC reports that Mexico and Central America have had more than 185,000 cumulative animal cases and more than 2,100 human cases in the current outbreak. (CDC)

Government response
USDA and Texas officials are treating this as a foreign animal disease emergency. Around confirmed detections, they are establishing 20-km infested/quarantine zones, movement controls, heightened surveillance, trapping, wildlife surveillance, and targeted outreach. (APHIS) USDA is also releasing sterile flies in and around affected areas; as of June 5, APHIS said releases included 2 million sterile screwworms twice weekly plus another 4 million per week deployed via ground chambers. (APHIS) USDA also says it is dispersing 100 million sterile insects per week in Mexico and along the U.S.-Mexico border and adjusting the release polygon as new cases emerge. (APHIS)

Trade and movement restrictions
USDA’s current status page says all southern ports of entry are closed to livestock trade at this time. It also points to USDA regional animal-health-status pages for affected regions and temporary trade restrictions. (APHIS)

What owners/veterinarians should watch for
USDA is urging animal owners to inspect animals daily for draining or enlarging wounds, maggots or egg masses, discomfort/irritability, and lesions around ears, nose, genitalia, or the umbilical area. Suspected cases should be reported immediately to a veterinarian, state animal health official, or USDA. (APHIS)

Bottom line
NWS appears to have entered the U.S. animal population in south/central Texas with at least one confirmed New Mexico dog case, but there are no confirmed locally acquired U.S. human cases reported by CDC. The response is active and aggressive, but this is exactly the kind of outbreak where today’s count may change quickly.

Map generated by ChatGPT using USDA and CDC data. For full data sources, see the associated article.