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Mexico - New World Screwworm (NWS) outbreak 2025-2026

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:

  1. A woman from Yucatan, whose death was reported in the Epidemiological Bulletin for the week of March 7-13, 2026 .
  2. One person from Oaxaca, in week 13 ( March 29-April 4 ).
  3. A resident of Querétaro, during week 25 (June 27-July 3) .
  4. A person from Veracruz, in week 33 (August 22-28) .
  5. A second resident of Veracruz, in week 37 (September 19-25) .
  6. A second resident of Oaxaca , in week 39 (October 3-9) .
  7. One person from Nayarit and one from Puebla , in week 40 (October 10-16) .
  8. A resident of Quintana Roo , in week 41 (October 17-23) of 2026 .

...

 
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