Mexico has reported a reemergence of myiasis, a disease caused by the Cattle Screwworm (GBG) or Cochliomyia hominivorax, in horses in Chiapas, with three cases identified. The disease was confirmed by the National Reference Center for Animal Parasitology and Analytical Technology (Cenapa) and is still in progress. The government has implemented measures such as movement restrictions, surveillance, disinfestation, traceability, and treatment to control the spread of the disease.