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151 clusters · 473 sources · 186 days · First seen · Last updated

US-Mexico screwworm: evolving containment and human impact

Overview

The New World screwworm outbreak continues to impact the U.S.–Mexico border, marked by a transition from emergency response to a permanent national campaign in Mexico. The Mexican government has established a Technical-Scientific Council to coordinate efforts across all 32 states, utilizing biotechnology and artificial intelligence to improve surveillance and eradication.

In Mexico, the infestation has reached significant scales. Human cases have surged in 2026, with 663 infections reported through mid-October, resulting in eight deaths across states including Oaxaca, Veracruz, Nayarit, Puebla, Querétaro, and Yucatán. Veracruz and Chiapas remain among the most heavily affected states.

Livestock impacts remain severe. While the USDA previously lifted an infested zone in New Mexico, a second case was confirmed in a horse in Grant County in September 2026, prompting expanded surveillance and fly-trapping. Despite this, cattle imports have resumed at the Santa Teresa port after a 16-month suspension.

In northern Mexico, authorities are utilizing biological controls, such as the weekly release of millions of sterile flies in Coahuila and Sonora, to secure export authorizations. However, challenges persist, including reports of illegal horse smuggling bypassing veterinary inspections and the need for improved wound treatment practices among producers to prevent larvae from aggravating injuries.

Entities

Mexico · Senasica · Chihuahua · USDA · United States

Claims

What the coverage asserts, and how many sources carry each claim.

Coverage disagrees

Sources make claims that cannot both be true. CLSTR reports the disagreement; it does not decide who is right.

  • "There are 1,965 active cases of screwworm in 29 Mexican entities."

    vs

    "As of August 5, 2026, there were 1,929 active cases recorded nationally in Mexico."

    The claims provide different numbers for the total active cases of screwworm in Mexico (1,965 vs 1,929).

  • "There are 1,963 active cases of screwworm in Mexico."

    vs

    "There are 1,965 active cases of screwworm in 29 Mexican entities."

    The claims provide different numbers for the total active cases of screwworm in Mexico (1,963 vs 1,965).

  • "There are 1,963 active cases of screwworm in Mexico."

    vs

    "As of August 5, 2026, there were 1,929 active cases recorded nationally in Mexico."

    The claims provide different numbers for the total active cases of screwworm in Mexico (1,963 vs 1,929).

  • "The state has acquired 9,000 preventive kits for livestock producers."

    vs

    "The Chihuahua Secretariat of Rural Development has distributed over 4,000 preventive kits to livestock producers."

    The claims state different quantities of preventive kits acquired/distributed by the Chihuahua state government (over 4,000 vs 9,000).

Timeline

  1. [HEALTH] 2 sources
    Mexico reports 663 human screwworm infections in 2026

    Mexico has recorded 663 human screwworm infections and eight deaths in 2026, marking a fivefold increase from 2025.

  2. [HEALTH] 8 sources
    Honduras and Mexico face rising threats from screw-worm infestation

    Honduras and Mexico are battling screw-worm infestations, with rising human cases and deaths reported in Honduras and Mexico, alongside significant economic impacts on the livestock sector.

  3. [INTERNATIONAL] 9 sources
    Mexico faces rising screw-worm fly infestations in Campeche and Chihuahua

    Screw-worm fly infestations are rising in Mexico, with Campeche exceeding 1,200 cases and Chihuahua reaching record levels of active cases, primarily affecting cattle and domestic animals.

  4. [HEALTH] 2 sources
    Screwworm outbreaks reported in Hidalgo and Querétaro, Mexico

    Mexico reports rising screwworm cases, with 24 confirmed human infections in Hidalgo and over 1,000 animal cases recorded in Querétaro, primarily affecting cattle.

  5. [HEALTH] 2 sources
    Screwworm infestations accelerate in Mexico with 157 cases in Sonora

    Screwworm infestations are rising in Mexico, with 157 cases reported in Sonora. Officials emphasize the difficulty of containment due to the pest's mobility and urge early detection in livestock and pets.

  6. [BUSINESS] 2 sources
    New Mexico expands screwworm surveillance as cattle imports resume

    New Mexico expands surveillance following a second New World screwworm case, while Texas lifts related quarantines and cattle imports resume at the Santa Teresa border crossing.

  7. [HEALTH] 16 sources
    Mexico reports surge in human screwworm cases in 2026

    Screwworm infestations in humans have quintupled in Mexico in 2026, with 575 cases and four deaths reported. The pest also heavily impacts livestock, with thousands of cases recorded in Campeche and Sonora.

  8. [HEALTH] 6 sources
    New World screwworm resurfaces in New Mexico

    The New World screwworm has resurfaced in New Mexico, complicating plans to reopen a major U.S. port for Mexican cattle imports following recent livestock infestations.

  9. [BUSINESS] 3 sources
    New Mexico screwworm case confirmed ahead of Santa Teresa port reopening

    A New World screwworm infestation in a New Mexico horse occurs just before the Santa Teresa port is set to reopen for Mexican cattle imports on September 24.

  10. [HEALTH] 2 sources
    Veracruz reports highest number of human screw-worm cases in Mexico

    Veracruz reports 113 human cases of screw-worm myiasis in 2026, the highest in Mexico, accounting for 20 percent of the nation's total cases.

  11. [BUSINESS] 9 sources
    Mexico manages cattle maggot outbreaks across multiple states

    Mexico manages cattle maggot outbreaks in Sonora, Tamaulipas, and Estado de México through sterile fly releases and sanitary barriers, while Coahuila faces export delays to the U.S.

  12. [HEALTH] 3 sources
    Coahuila reports 38 screwworm cases, including two in Monclova

    Coahuila, Mexico, reports 38 cases of screwworm, including two in Monclova. Authorities are launching preventive medication campaigns to protect livestock and pets from the parasite.

  13. [INTERNATIONAL] 2 sources
    Horse smuggling threatens U.S. efforts to contain New World screwworm

    Illegal horse smuggling across the U.S.-Mexico border threatens efforts to contain the New World screwworm, a parasite that has recently returned to the region after decades of eradication.

  14. [BUSINESS] 2 sources
    Mexico combats screwworm outbreaks in Coahuila and Chihuahua

    Mexican states Coahuila and Chihuahua are using sterile fly releases and sanitary protocols to combat screwworm outbreaks in livestock and protect cattle export opportunities to the United States.

  15. [BUSINESS] 5 sources
    Secretariat of Rural Development warns against improper Cattle Screwworm treatment

    Mexico's Secretariat of Rural Development warns livestock producers against using harmful home remedies to treat Cattle Screwworm wounds, urging professional veterinary consultation instead.

  16. [BUSINESS] 8 sources
    Mexico inspects 80,000 cattle shipments to combat screw worm

    Mexico has inspected over 80,000 cattle shipments to control the cattle screw worm pest, detecting 222 cases primarily in Chiapas and Tabasco to prevent national spread.

  17. [BUSINESS] 3 sources
    New World screwworm zone in New Mexico released by USDA

    USDA has lifted the New World screwworm infested zone in New Mexico following successful containment, even as a new case of the parasitic fly is detected in Mexico near the U.S. border.

  18. [HEALTH] 6 sources
    Mexico reports fourth death from screw-worm parasite in 2026

    Mexico reports its fourth death from the screw-worm parasite in 2026, with the latest fatality occurring in Veracruz. The country has seen 516 cases so far this year.

  19. [BUSINESS] 3 sources
    New Mexico screwworm infested zone lifted by USDA

    USDA APHIS has lifted the New World screwworm infested zone in New Mexico after no new cases were detected since June, allowing for the normal movement of livestock and pets.

  20. [BUSINESS] 5 sources
    Mexico establishes scientific council to combat Cattle Screwworm

    Mexico has launched a Technical-Scientific Council to transition its Cattle Screwworm strategy from an emergency response to a permanent national campaign using biotechnology and AI.

  21. [BUSINESS] 4 sources
    Mexico combats screwworm outbreak to stabilize livestock exports

    Mexico is using sterile fly releases to combat a screwworm outbreak in Chihuahua and Sonora, aiming to stabilize livestock exports and potentially reopen more border ports to the United States.

  22. [INTERNATIONAL] 16 sources
    Mexico scales up national campaign to combat cattle screwworm outbreak

    Mexico is transitioning its screwworm response to a permanent national campaign as outbreaks continue in Sonora and Chihuahua, including confirmed human cases in Sinaloa.

  23. [INTERNATIONAL] 3 sources
    Sonora detects first case of New World Screwworm

    The first case of New World Screwworm has been detected in Sonora, Mexico, prompting new sterile fly facility investments in Texas and Arizona.

  24. [HEALTH] 4 sources
    Mexico reports 602 human cases of screw-worm infestation

    Mexico reports 602 human cases of screw-worm (Cochliomyia hominivorax) across 25 states, primarily affecting men and seniors in rural areas.

  25. [INTERNATIONAL] 6 sources
    Mexico's Comisión Permanente urges action against screwworm parasite

    Mexico's Comisión Permanente has urged Sader and Senasica to intensify efforts to control the screwworm parasite, which has caused over 33,000 cases since late 2024.

  26. [BUSINESS] 31 sources
    Sonora confirms first screwworm case, triggering sanitary protocols

    The first screwworm case in Sonora has left only two Mexican states free of the parasite. Authorities have implemented a 20km sanitary perimeter and released sterile flies to contain the infestation.

  27. [INTERNATIONAL] 14 sources
    New World screwworm outbreak threatens Mexico-US border

    Authorities are monitoring New World screwworm outbreaks in Mexico that threaten livestock and the US border, while Irapuato officials implement new security strategies following an academic evaluation.

  28. [INTERNATIONAL] 22 sources
    Chihuahua implements sanitary protocol to combat cattle screwworm

    Chihuahua has implemented a new sanitary protocol and released nearly 15 million sterile flies to combat the cattle screwworm outbreak across 67 municipalities.

  29. [HEALTH] 4 sources
    New World screwworm re-emerges in Mexico and US

    The New World screwworm is re-emerging in Mexico and the US, causing human infestations and livestock damage. Researchers are exploring CRISPR-based sterile insect technology to aid eradication efforts.

  30. [HEALTH] 6 sources
    Mexico implements sanitary barriers to combat screwworm spread

    Mexico is deploying millions of sterile flies and establishing new sanitary barriers in Chihuahua and the State of Mexico to contain the spread of the screwworm and prevent myiasis.

  31. [INTERNATIONAL] 16 sources
    Cattle screwworm outbreak triggers sanitary measures across Mexico

    Mexico is battling a widespread cattle screwworm outbreak, with nearly 2,000 active cases reported. Authorities are using sterile fly dispersion and intensified inspections to contain the pest's spread.

  32. [HEALTH] 4 sources
    Mexico expands sterile fly program to combat bovine screwworm

    Mexico advances a sterile‑fly campaign against the bovine screwworm, adding new patents, releasing millions of sterile insects, urging the public not to kill them, and seeking to include Zacatecas in the effort

  33. [HEALTH] 8 sources
    Mexico's Cattle Worm Outbreak Reaches 77 Cases in Chihuahua, 644 in Guanajuato

    Mexico reports 77 cattle worm cases in Chihuahua and 644 total in Guanajuato, with 100 active, as authorities deploy sterile flies and surveillance to contain the outbreak.

  34. [HEALTH] 12 sources
    Mexico steps up screwworm fly control as cases climb in Puebla and Chihuahua

    Mexico intensifies screwworm fly control as cases surge in Puebla (172) and Chihuahua (41), deploying sterile flies, training producers, and expanding wildlife surveillance.

  35. [HEALTH] 18 sources
    Gusano barrenador outbreak spreads across Mexican states, prompting sterilized‑fly releases and US cattle‑export pause

    Mexico’s gusano barrenador parasite spreads in Chihuahua, Zacatecas, Coahuila and other states; sterile‑fly releases and free inspections are underway, and the US USDA plans to reopen a cattle export crossing,‑

  36. [HEALTH] 5 sources
    Mexico reports surge in human myiasis cases and first fatality

    Mexico logged 361 myiasis cases in early 2026, including three deaths, with hotspots among elderly men in rural Sierra regions; 37 cases were reported in Yucatán and three in Morelos, prompting health warnings.

  37. [HEALTH] 8 sources
    USDA ramps up response to New World screwworm outbreak in Texas

    USDA confirmed New World screwworm in Texas (June 3, 2026), 27 cases across TX/NM by June 30, and is boosting inspections and treatments as active cases fall to ten, affecting livestock‑border policies.

  38. [TECHNOLOGY] 7 sources
    U.S. launches GMO screwworm fly trials in Panama to combat livestock pest

    U.S. scientists begin outdoor trials of GMO sterile screwworm flies in Panama to combat a livestock parasite threatening Texas cattle and $1 bn in losses.

  39. [HEALTH] 6 sources
    Mexico's screw-worm fly outbreak spreads across northern states

    Screw‑worm fly infections rise in Mexico, with a human case in Jalisco, dozens of animal cases, and spread to six northern states, triggering a US cattle import ban and costly control efforts.

  40. [HEALTH] 6 sources
    USDA Confirms 41 New World Screwworm Cases in U.S., Expands Eradication Program

    USDA confirms 41 New World screwworm cases in Texas and New Mexico, expands sterile‑fly releases and border traps to protect livestock and contain the pest.

  41. [HEALTH] 3 sources
    Wisconsin Tightens Livestock Import Rules to Block New World Screwworm

    Wisconsin imposes stricter import rules for livestock to prevent the New World Screwworm, requiring detailed veterinary certificates, permits and biosecurity measures effective July 21.

  42. [BUSINESS] 16 sources
    Mexico's screw-worm fly spreads to 28 states, triggers health and livestock alerts

    Mexico's screw-worm fly now affects 28 states, causing $400‑500 M in livestock losses, human cases, export bans and prompting sterile‑fly releases and climate‑risk warnings.

  43. [HEALTH] 2 sources
    US livestock sector emphasizes disease surveillance after screwworm case and hatchery microbe findings

    US producers are urged to monitor for New World screwworm after a Texas case, while a Zoetis study flags ongoing Aspergillus contamination in hatcheries, stressing tighter sanitation and surveillance.

  44. [HEALTH] 2 sources
    New World Screw Worm Returns to US Livestock in Texas and New Mexico

    The New World Screw Worm parasite reappeared in U.S. livestock after 60 years, with confirmed cases in Texas and New Mexico, prompting USDA-led emergency monitoring and control measures.

  45. [BUSINESS] 2 sources
    Screw-worm fly threatens US cattle, says Polish beef sector safe

    The US screw-worm fly outbreak threatens cattle with billions in losses, but Polish beef experts say it poses no risk to Poland.

  46. [HEALTH] 5 sources
    New World Screwworm Sparks US Import Restrictions and Mexico Trade Halt

    New World screwworm reappears near the US‑Mexico border, prompting USDA import bans, sterile‑fly releases, Wisconsin’s tightened animal import rules, and Mexico’s halt to US live‑animal imports, with potential

  47. [BUSINESS] 17 sources
    Mexico's cattle worm outbreak in Chihuahua threatens $2 billion in exports

    Mexico’s first cattle‑worm case in Chihuahua triggers a 20‑km/40‑km sanitary zone, $2 bn export losses risk, US border closure, and nationwide control measures including sterile‑fly releases.

  48. [HEALTH] 5 sources
    New World screwworm outbreak returns to Texas, spreads to New Mexico

    The New World screwworm has returned to Texas and New Mexico, with 33 animal cases and a new infested zone in Sutton County; officials warn of up to $1.8 billion in livestock losses.

  49. [HEALTH] 3 sources
    Yucatán launches phase‑two trap program to curb worm infestation harming livestock and humans

    Yucatán expands its worm‑infestation control with 625 blue traps in 13 areas, addressing 2,259 animal cases and 36 human miasis infections, including one death.

  50. [INTERNATIONAL] 2 sources
    Mexico opens Chiapas sterile‑fly factory to curb cattle grub disease

    Mexico’s new Chiapas sterile‑fly factory, funded by Mexico and the U.S., will produce up to 100 million sterile flies weekly to control the cattle grub fly and help reopen the U.S.–Mexico livestock border.

  51. [HEALTH] 4 sources
    New World screwworm infestations reported in Texas, New Mexico and Mexico

    New World screwworm cases have emerged in Mexico and across Texas and New Mexico, prompting alerts and monitoring in the US and Hawaii.

  52. [HEALTH] 4 sources
    Texas faces dual invasive insect threats to cattle and pasture lands

    Texas contends with a fast‑spreading pasture mealybug threatening cattle pastures and a resurging New World screwworm endangering livestock and pets, prompting urgent control measures.

  53. [HEALTH] 12 sources
    Mexico launches sterile‑fly release in Tamaulipas to combat screwworm

    Mexico will begin releasing sterile flies from Tamaulipas, produced at a new Chiapas plant, to eradicate the screwworm affecting cattle; up to 100 million flies weekly aim to lift US trade bans.

  54. [HEALTH] 4 sources
    Screwworm infestations surge in Panama, United States and Guatemala

    Panama reports 55 human screwworm cases, the US confirms 32 livestock infections, and Guatemala inspects over 245,000 animals to curb the parasite.

  55. [HEALTH] 2 sources
    Mexico reports hundreds of animal worm cases and dengue decline in Tabasco

    Hidalgo logged 942 livestock screwworm cases and 14 human infections (one unrelated death); Tabasco saw 414 dengue cases, dropping to fourth nationally, with intensified vector control.

  56. [HEALTH] 2 sources
    Public health agencies train vector‑surveillance teams in Mexico and Spain

    Mexico and Spain conducted training exercises to boost surveillance and response to screwworm and tiger‑mosquito threats, enhancing public‑health preparedness.

  57. [HEALTH] 3 sources
    Cochliomyia hominivorax worm infestation spreads across Mexico and reaches the United States

    A re‑emergent screwworm fly infestation in Mexico, with over 28,000 animal cases, has spread to Texas and New Mexico, prompting border livestock restrictions and renewed biocontrol efforts.

  58. [HEALTH] 3 sources
    Texas livestock threatened by invasive pasture mealybug and New World screwworm

    Invasive pasture mealybug and New World screwworm are spreading across Texas, threatening forage and the $41 billion cattle industry, with limited control measures and ongoing containment efforts.

  59. [HEALTH] 4 sources
    Veracruz reports surge in screw-worm fly (myiasis) cases

    Veracruz has 70 confirmed screw‑worm fly (myiasis) cases, the second‑highest in Mexico, prompting health alerts and treatment guidance.

  60. [HEALTH] 2 sources
    Four Human Myiasis Cases Confirmed in Querétaro, Mexico

    Querétaro's health secretariat reports four human cases of screw‑worm myiasis in 2026, urging prompt medical care and heightened surveillance.

  61. [HEALTH] 2 sources
    Coahuila health officials report first human myiasis case, warn of wound care

    Coahuila confirms Mexico's first human myiasis case in an 84‑year‑old vet, urging wound care; Michoacán health officials warn of rain‑related mosquito risks and advise preventive measures.

  62. [BUSINESS] 5 sources
    US and Mexico Expand Sterile Fly Program to Fight New World Screwworm

    US and Mexico are scaling up a sterile‑fly program to contain the New World screwworm, with a new USDA facility in Mexico set to release 30 million flies by July amid 16 U.S. cases and potential billions in liv

  63. [INTERNATIONAL] 2 sources
    Mexico and United States inaugurate sterile‑fly plant in Chiapas

    Mexico’s President Claudia Sheinbaum and U.S. officials inaugurated a binational sterile‑fly plant in Chiapas that will produce 100 million insects weekly to fight the cattle grub worm, boosting livestock‑herd

  64. [INTERNATIONAL] 30 sources
    Claudia Sheinbaum opens US‑Mexico sterile‑fly plant in Chiapas

    President Sheinbaum opened a US‑Mexico sterile‑fly plant in Chiapas to fight the livestock‑killing screwworm, with $144 M joint investment, and delivered housing that adds ~1 % to Mexico’s GDP.

  65. [HEALTH] 2 sources
    US livestock face rising New World Screwworm cases as Mississippi reports none

    USDA reports 20 New World Screwworm detections, all in Texas and New Mexico, while Mississippi says none and readies a response plan for livestock.

  66. [INTERNATIONAL] 21 sources
    Mexico‑US Inaugurate Sterile Fly Plant in Chiapas to Combat Screwworm

    Mexico and the U.S. opened a $61 M sterile‑fly plant in Chiapas on 27 June 2026, aiming to produce 100 M sterile flies weekly to curb the screwworm outbreak affecting livestock and trade.

  67. [HEALTH] 5 sources
    New World Screwworm Detected in Texas Threatens Livestock and Pets

    USDA confirms the first U.S. New World screwworm case in Texas, risking livestock, dairy supply and pet health; sterile‑male releases may be used to contain the fly.

  68. [HEALTH] 9 sources
    Mexico and United States intensify response to screwworm outbreak in livestock

    Mexico’s screwworm cases surged 83.5% to 30,500 by June, spreading into Texas where 20 US animal infections were confirmed; joint Mexico‑US investments fund new sterile‑fly plants and emergency measures.

  69. [HEALTH] 2 sources
    Veracruz legislators under scrutiny and worm outbreak threatens cattle and public health

    Veracruz lawmakers face probe over a 3 million‑peso resource use while a screwworm outbreak adds 34 human cases, two deaths and threatens cattle trade, prompting US and Mexican health actions.

  70. [HEALTH] 5 sources
    Texas sees 16 New World Screwworm cases in livestock

    USDA reports 16 New World screwworm cases in Texas and New Mexico livestock, urging vigilance to prevent spread.

  71. [BUSINESS] 4 sources
    Mexico cattle sector suffer price slump as worm-driven border closure bites

    Mexican cattle producers face price drops as the cattle worm shuts the U.S. live‑cattle border, while packaged meat exports rise 30% after shifting to domestic finishing and a new sterile‑fly plant is slated to

  72. [HEALTH] 8 sources
    US-Mexico Joint Inspection Targets Cattle Borer Worm in Coahuila

    US and Mexican authorities conduct joint inspections in Coahuila to fight the cattle borer worm amid rising cases in Texas and Mexico, including human infections, and outline long‑term eradication plans.

  73. [HEALTH] 8 sources
    New World screwworm cases rise to 15 in Texas

    USDA reports 15 New World screwworm cases in Texas; sterile‑fly releases underway, with facilities planned in Mexico and Texas to avert a potential $1.8 billion livestock loss.

  74. [BUSINESS] 2 sources
    US ground beef prices surge 20% amid screwworm outbreak and trade deal uncertainty

    US ground beef prices have jumped over 20% due to a screwworm outbreak, drought and USMCA renewal uncertainty, prompting shoppers to shift to cheaper proteins.

  75. [HEALTH] 2 sources
    Veracruz reports surge in dengue cases and leads nation in human myiasis infections

    Veracruz logged 354 dengue cases, one death, and a drop from 2025, while also leading Mexico with 69 human myiasis infections, prompting health warnings.

  76. [HEALTH] 2 sources
    Coahuila Remains Free of Human Myiasis Cases Amid National Surge

    Coahuila reports no human myiasis cases, only two infected dogs, while Mexico records 295 cases and two deaths; joint health‑rural actions focus on animal monitoring and wound hygiene.

  77. [HEALTH] 2 sources
    Texas New World Screwworm Outbreak Triggers State Website and Shelter Safeguards

    Texas governor launches a new screwworm information website as the state battles a New World screwworm outbreak, while shelters adopt tighter inspections, parasite treatments and face quarantine and interstate‑

  78. [HEALTH] 3 sources
    Mexican livestock parasite outbreak deemed safe for meat consumption

    Mexico says meat from cattle infected with the barrenador worm remains safe after treatment, while rising animal and human cases spur lawmakers to demand stronger federal and state parasite control.

  79. [HEALTH] 6 sources
    Veracruz reports 69 human cases of botfly (myiasis) in 2026

    Veracruz logged 69 botfly myiasis cases in 2026, the highest state count, with no deaths; Mexico totals 412 cases and two deaths nationwide.

  80. [BUSINESS] 4 sources
    USDA launches $105 million program to curb New World Screwworm in U.S. livestock

    USDA funds $105 M for 40 projects, including drones and sterile flies, to fight New World Screwworm after 11‑12 cases in Texas and New Mexico; horse owners receive guidance and Arkansas tightens animal‑movement

  81. [HEALTH] 2 sources
    New World Screwworm Reappears in US, Prompting Veterinary Alerts and Beef Industry Concerns

    USDA reports six New World Screwworm cases in Texas/New Mexico, prompting veterinary alerts and a costly government response amid modest beef‑price concerns.

  82. [BUSINESS] 2 sources
    US Beef Prices Surge as Screwworm Outbreak and USMCA Trade Talks Heighten Risks

    US beef prices have risen over 20% as a screwworm outbreak spreads from Mexico, while USMCA trade talks create import uncertainty; USDA invests $105 M in bio‑security to contain the threat.

  83. [HEALTH] 2 sources
    Mexico logs 295 human screwworm cases in 2026, sterile‑fly plant delayed

    Mexico's health ministry reports 295 human screwworm infections in early 2026, chiefly in Veracruz, with two deaths, while a sterile‑fly plant in Chiapas is 75% complete but not yet operational.

  84. [HEALTH] 6 sources
    USDA allocates $105 M to fight New World screwworm outbreak

    USDA has allocated $105 M to 40 projects, including Texas A&M research, AI drone partnerships, and veterinary resources, to contain New World screwworm cases in Texas and New Mexico, while ranchers and PA/NJ ag

  85. [HEALTH] 2 sources
    New World screwworm parasite resurges in US livestock

    USDA reports 11 New World screwworm cases in Texas and New Mexico, prompting intensified surveillance and sterile‑fly releases to protect livestock and prevent spread to Europe.

  86. [HEALTH] 2 sources
    New World screwworm prompts US emergency drug approval and Colorado movement restrictions

    The FDA approved emergency use of nitenpyram for New World screwworm in pets, and Colorado imposed strict animal‑movement inspections to block the parasite’s spread after recent Texas and New Mexico cases.

  87. [BUSINESS] 4 sources
    New World screwworm outbreak threatens Texas cattle industry

    Texas monitors a New World screwworm resurgence with nine livestock cases; USDA declares disaster, California tightens animal entry rules, and a sterile‑fly facility opens to curb the threat to cattle and beef.

  88. [HEALTH] 2 sources
    State of Mexico calls for extra funds to battle livestock botfly outbreak

    State of Mexico deputy Javier Cruz seeks more funding to combat a cattle botfly, citing nine active cases and a total of 289 across 40 municipalities, with coordination extending to neighboring states.

  89. [HEALTH] 2 sources
    US screwworm outbreak threatens Texas cattle industry

    A screwworm fly outbreak in Texas and New Mexico has infected six cattle, prompting USDA and CDC emergency actions and plans to boost sterile‑fly releases to curb spread.

  90. [BUSINESS] 2 sources
    US Agriculture Secretary Brooke Rollins denies aid cuts linked to screwworm resurgence

    US Agriculture Secretary Brooke Rollins said aid cuts did not trigger the screwworm outbreak in Texas and New Mexico, noting USDA staff rose from 10 to over 120 and warning of possible multi‑billion‑dollar C‑c​

  91. [HEALTH] 3 sources
    US detects Barren Worm in Texas, prompting Mexico to halt live cattle imports

    USDA reports a bovine screwworm case in Texas; Mexico suspends live cattle imports, citing illegal cattle smuggling and disease risk, as experts warn of billions‑dollar losses.

  92. [HEALTH] 9 sources
    USDA Mobilizes Against New World Screwworm Outbreak in Texas and New Mexico

    USDA confirms New World screwworm in Texas and New Mexico, creates quarantine zones, releases sterile flies, fast‑tracks treatments and FDA authorizes emergency drug for pets.

  93. [HEALTH] 2 sources
    US CDC launches emergency response to screwworm fly outbreak in livestock

    The US CDC activated a Level 3 emergency response after detecting the New World screwworm fly in cattle, a Texas goat and a New Mexico dog, coordinating with the USDA to monitor and contain the parasite.

  94. [BUSINESS] 4 sources
    Minnesota Beef Prices Face Potential Rise Amid Texas Screwworm Outbreak

    Texas’s New World screwworm outbreak may push up Minnesota beef prices, though local supply could limit the impact.

  95. [HEALTH] 2 sources
    Xalapa pet worm infestation threatens stray animals

    Protectors in Xalapa report a surge in screwworm myiasis in stray dogs and cats, warning that untreated open wounds can kill animals within hours.

  96. [POLITICS] 6 sources
    US Agriculture Secretary Rollins addresses New World screwworm outbreak

    US Agriculture Secretary Brooke Rollins reported six screwworm cases, said the outbreak is under control, and noted a $1.3 bn USDA response, while a Trump official blamed Biden’s immigration policies for the re

  97. [HEALTH] 4 sources
    New World screwworm resurfaces in US Southwest, prompting statewide response

    USDA reports a second New World screwworm case in New Mexico after Texas, linking spread to illegal cattle smuggling. Sterile‑fly releases and state alerts aim to contain a threat that could cost the beef trade

  98. [HEALTH] 2 sources
    Texas Gov. Greg Abbott Declares Statewide Disaster Over Screwworm Outbreak in Cattle

    Gov. Greg Abbott declared a Texas disaster after New World screwworm was found in two calves, prompting cattle movement bans and a federal sterile‑fly eradication plan; ERCOT expects record power demand, the Secretary of State resigns, and groups seek to restore the Texas Dream Act.

  99. [HEALTH] 5 sources
    USDA Leads Coordinated Fight Against New World Screwworm in Texas

    USDA and Texas partners are executing a five‑prong plan and sterile‑insect releases to contain New World screwworm, following five U.S. cases including a new calf infection in La Salle County, Texas.

  100. [BUSINESS] 2 sources
    USDA bans all live animal exports to Mexico over screwworm outbreak

    USDA halted all live animal exports to Mexico after screwworm cases were found in Texas and New Mexico, curbing West Texas feedlots while opening meat export chances for Mexican ranchers.

Sources

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This summary has been updated 27 times: see revision history