For the second consecutive week, Yucatán reported a new human case of screwworm infestation caused by the fly Cochliomyia hominivorax during week 46 (November 9-15) of 2025, bringing the total number of infested Yucatecans to six in three months, according to the Mexican Ministry of Health (SSA).
In its Epidemiological Bulletin for Week 46, published this afternoon, Monday, November 24, 2025, the SSA reports that Yucatán was the only one of the country’s 32 states to report human cases of screwworm infestation, as the larvae of the New World fly are known.
As of November 15, the SSA specifies, Chiapas remains at 75 confirmed human cases of myiasis (maggot infestation) caused by Cochliomyia hominivorax; Yucatán, at six; Campeche, at three; and Tabasco, at one.
According to the Yucatán Health Secretariat (SSA), a 33-year-old man residing in the Pueblo Mágico (Magical Town) of Maní, located in southern Yucatán, is hospitalized in the southern city of Tekax with head and neck myiasis. He also has obesity and alcoholism as comorbidities.
This man from Maní is the youngest Yucatecan with screwworm infestation.
With him, there are now two Yucatecans hospitalized in Tekax with this infestation. A 36-year-old woman from Yaxcabá has been hospitalized for four weeks because the worms infested her right upper extremity; she also suffers from epilepsy.
The woman from Yaxcabá is the fourth human case of myiasis caused by Cochliomyia hominivorax in Yucatán, a disease confirmed in week 43 (October 19-25), according to the SSA.
Source: yucatan
