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Mexico - New World Screwworm (NWS) outbreak 2025-2026
- Thread starter Pathfinder
- Start date
Pathfinder
Editor, Senior Moderator
Pathfinder
Editor, Senior Moderator
See also post #121
Translation Google
First human death from screwworm in Quintana Roo; Yucatán reports new cases
By Flor Estrella Santana
October 27, 2026, 11:34 am
This region accounts for 12.8% of the 806 accumulated cases in the country and 22.2% of the nine deaths.
The Yucatan Peninsula experienced its worst week of October due to the cattle screwworm , reporting one death and three new human cases .
The tourist state of Quintana Roo reported its first human death from myiasis (infestation) by the Cochliomyia hominivorax fly , whose larvae are known as the cattle screwworm , in week 41 (October 17-23) of 2026 , reports the Federal Health Secretariat (SSA) .
Meanwhile, Yucatán reported three new human cases of myiasis caused by the cattle screwworm in week 41 (W41) , while Campeche did not register any deaths or cases of this disease.
Mexico's screwworm death toll reaches 9
In total, nine people in Mexico have already died from myiasis caused by the C. hominivorax fly , the latter Latin word meaning "man-eater" , in eight months of 2026.
The SSA reported the deaths in the following chronological order:
...
www.yucatan.com.mx
Translation Google
First human death from screwworm in Quintana Roo; Yucatán reports new cases
By Flor Estrella Santana
October 27, 2026, 11:34 am
This region accounts for 12.8% of the 806 accumulated cases in the country and 22.2% of the nine deaths.
The Yucatan Peninsula experienced its worst week of October due to the cattle screwworm , reporting one death and three new human cases .
The tourist state of Quintana Roo reported its first human death from myiasis (infestation) by the Cochliomyia hominivorax fly , whose larvae are known as the cattle screwworm , in week 41 (October 17-23) of 2026 , reports the Federal Health Secretariat (SSA) .
Meanwhile, Yucatán reported three new human cases of myiasis caused by the cattle screwworm in week 41 (W41) , while Campeche did not register any deaths or cases of this disease.
Mexico's screwworm death toll reaches 9
In total, nine people in Mexico have already died from myiasis caused by the C. hominivorax fly , the latter Latin word meaning "man-eater" , in eight months of 2026.
The SSA reported the deaths in the following chronological order:
- A woman from Yucatan, whose death was reported in the Epidemiological Bulletin for the week of March 7-13, 2026 .
- One person from Oaxaca, in week 13 ( March 29-April 4 ).
- A resident of Querétaro, during week 25 (June 27-July 3) .
- A person from Veracruz, in week 33 (August 22-28) .
- A second resident of Veracruz, in week 37 (September 19-25) .
- A second resident of Oaxaca , in week 39 (October 3-9) .
- One person from Nayarit and one from Puebla , in week 40 (October 10-16) .
- A resident of Quintana Roo , in week 41 (October 17-23) of 2026 .
...
Primera muerte humana por gusano barrenador en Quintana Roo; Yucatán, con nuevos enfermos
La Península de Yucatán vive su peor semana de octubre por el gusano barrenador: una muerte y más casos humanos, según la SSA de México.
www.yucatan.com.mx
Pathfinder
Editor, Senior Moderator
Pathfinder
Editor, Senior Moderator
Shiloh
Editor, Senior Moderator
Friday, November 6, 2026
Sinaloa reports four cases of screwworm in humans; four others under investigation
Confirmed patients are adults—primarily older adults—with open wounds or other vulnerabilities
Mario Núñez
Culiacán, Sin.—Older adults and patients with open or infected wounds account for the cases of screwworm detected in humans in Sinaloa, where the Secretariat of Health has confirmed four infections, with another four currently under investigation.
State Secretary of Health Cuitláhuac González Galindo reported that the identified patients are from Culiacán, Mazatlán, and Rosario; none have died to date.
According to the state official, the department has examined 13 suspected cases: four were ruled out, four were confirmed, and four remain pending diagnosis.
He further explained that some of the patients have conditions that increase their vulnerability to infestation—such as being bedridden or having exposed lesions—which facilitate the presence of larvae.
Regarding their medical progress, he stated that those diagnosed have responded well to treatment, which involves removing the larvae and administering medication to treat the lesions and prevent complications.
González Galindo warned that the fly responsible for transmitting the screwworm is still present in Sinaloa, posing an ongoing risk of new cases in both humans and animals.
In response, the Secretariat of Health is conducting outreach and training initiatives to ensure the timely detection of potential infestations.
In this regard, he noted that 300 workers who conduct house-to-house visits received training this week.
Additionally, he indicated that efforts are underway to strengthen coordination with the Secretariat of Agriculture and Livestock to expand preventive measures and address the presence of this pest within the state. Health authorities continue to urge vigilance regarding open wounds—especially in individuals with limited mobility or those requiring ongoing care—as these can pose a risk for this type of infestation.
Source: https://oem.com.mx/elsoldesinaloa/l...anos-otros-cuatro-estan-bajo-estudio-32996794
Sinaloa reports four cases of screwworm in humans; four others under investigation
Confirmed patients are adults—primarily older adults—with open wounds or other vulnerabilities
Mario Núñez
Culiacán, Sin.—Older adults and patients with open or infected wounds account for the cases of screwworm detected in humans in Sinaloa, where the Secretariat of Health has confirmed four infections, with another four currently under investigation.
State Secretary of Health Cuitláhuac González Galindo reported that the identified patients are from Culiacán, Mazatlán, and Rosario; none have died to date.
According to the state official, the department has examined 13 suspected cases: four were ruled out, four were confirmed, and four remain pending diagnosis.
He further explained that some of the patients have conditions that increase their vulnerability to infestation—such as being bedridden or having exposed lesions—which facilitate the presence of larvae.
Regarding their medical progress, he stated that those diagnosed have responded well to treatment, which involves removing the larvae and administering medication to treat the lesions and prevent complications.
González Galindo warned that the fly responsible for transmitting the screwworm is still present in Sinaloa, posing an ongoing risk of new cases in both humans and animals.
In response, the Secretariat of Health is conducting outreach and training initiatives to ensure the timely detection of potential infestations.
In this regard, he noted that 300 workers who conduct house-to-house visits received training this week.
Additionally, he indicated that efforts are underway to strengthen coordination with the Secretariat of Agriculture and Livestock to expand preventive measures and address the presence of this pest within the state. Health authorities continue to urge vigilance regarding open wounds—especially in individuals with limited mobility or those requiring ongoing care—as these can pose a risk for this type of infestation.
Source: https://oem.com.mx/elsoldesinaloa/l...anos-otros-cuatro-estan-bajo-estudio-32996794
Last edited by a moderator:
Pathfinder
Editor, Senior Moderator
Pathfinder
Editor, Senior Moderator
Pathfinder
Editor, Senior Moderator
Translation Google
Man dies in the street in Oaxaca from possible screwworm infestation; he had myiasis
If the case is confirmed, it would be the third death from screwworm in the state.
Álvaro Morales
Oaxaca /14.11.2026 09:55:00
Health authorities in Oaxaca reported the death of a vulnerable person; it is being treated as a possible death caused by screwworms.
Authorities confirmed that the man had myiasis , but maintained that they could not confirm that it was screwworm until there was a laboratory test with a positive result.
However, they indicated that days earlier, the man had tried unsuccessfully to be treated by rescue teams and that he remained under the supervision of the DIF of Oaxaca de Juárez.
Reports indicate that the man responded aggressively to people who tried to approach him.
If confirmed, this would be the third death from screwworm in Oaxaca , after the deaths of two elderly people.
Residents of the area reported the death of the man during the early hours of this day, near a river, on Miguel Hidalgo street at the corner of Ricardo Flores Magón in the Ejido Guadalupe Victoria.
At approximately 7:50 a.m. this Friday, police authorities arrived at the scene to collect the remains.
The Oaxaca de Juárez Police acted as first responders and, later, personnel from the State Investigation Agency (AEI) arrived at the area.
The victim was identified as Gerardo, 44 years old, originally from Chiapas.
amp.milenio.com
Man dies in the street in Oaxaca from possible screwworm infestation; he had myiasis
If the case is confirmed, it would be the third death from screwworm in the state.
Álvaro Morales
Oaxaca /14.11.2026 09:55:00
Health authorities in Oaxaca reported the death of a vulnerable person; it is being treated as a possible death caused by screwworms.
Authorities confirmed that the man had myiasis , but maintained that they could not confirm that it was screwworm until there was a laboratory test with a positive result.
However, they indicated that days earlier, the man had tried unsuccessfully to be treated by rescue teams and that he remained under the supervision of the DIF of Oaxaca de Juárez.
Reports indicate that the man responded aggressively to people who tried to approach him.
If confirmed, this would be the third death from screwworm in Oaxaca , after the deaths of two elderly people.
Residents of the area reported the death of the man during the early hours of this day, near a river, on Miguel Hidalgo street at the corner of Ricardo Flores Magón in the Ejido Guadalupe Victoria.
At approximately 7:50 a.m. this Friday, police authorities arrived at the scene to collect the remains.
The Oaxaca de Juárez Police acted as first responders and, later, personnel from the State Investigation Agency (AEI) arrived at the area.
The victim was identified as Gerardo, 44 years old, originally from Chiapas.
Indagan muerte hombre como posible caso gusano barrenador Oaxaca
Autoridades de salud investigan la muerte de un hombre de 44 años en situación de calle como un posible tercer deceso por gusano barrenador en la entidad.
amp.milenio.com