Historically and in general, myiasis cases have been classified by 2 systems. Although nearly all cases of myiasis are produced by parasitic flies, there are cases in which free-living flies can invade accidentally the body or cavities of vertebrates for some time, but not necessarily complete their development. The term Myiasis, from Greek μυĩα ( myia), “fly” -ωσιζ (osis), “state, abnormal condition, or action”, is a medical descriptive term that refers to the invasion or infestation of the body of vertebrates by fly (dipterous) larvae. La deyección del coyote de donde los tórsalos fueron obtenidos indica que el daño en el aparato digestivo de depredadores de conejos puede tener graves consecuencias en los individuos, y un aumento en la abundancia de estas moscas puede favorecer problemas de salud que deterioran la calidad de vida no solo de los hospederos normales, sino también de sus depredadores. Sus características coinciden con la descripción de Cuterebra buccata, pero el grado de conocimiento taxonómico del grupo en etapa larval no permite asegurar la identidad de la especie. Los ejemplares fueron estudiados en el laboratorio y correspondían a una especie de Cuterebra del grupo buccata, cuyos hospederos normales son liebres y conejos (Lagomorpha). En una deyección de coyote con evidencias de diarrea y sangrado hallada en el municipio de Perote, estado de Veracruz, se encontraron 2 larvas de mosca miasígenas de la familia Oestridae. Se documenta el hallazgo de un caso incidental de pseudomiasis gástrica en el coyote Canis latrans causado por el tórsalo de conejo Cuterebra sp. The coyote scat from which the bot fly larvae were recovered indicates that damage in the digestive tract of rabbit-predators may have serious consequences in individuals, and an increment in the abundance of these flies may favor a health problem that diminishes the life quality, not only for normal hosts, but also for their predators. Their characteristics are similar to those described for Cuterebra buccata, but the level of taxonomic knowledge of the larval stage of this family does not permit a confident identification to species. Specimens were studied in the laboratory and found to correspond to a Cuterebra species of the buccata species-group, of which their normal hosts are hares and rabbits (Lagomorpha). In a coyote scat not entirely solid but somewhat watery and surrounded by mucous in the municipality of Perote, state of Veracruz, 2 myiasigenous fly larvae of the family Oestridae were found. An incidental case of gastric pseudomyiasis in the coyote Canis latrans by a rabbit bot fly Cuterebra sp.
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