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espanolRESUMEN Objetivo. Se describe el caso de un perro parasitado con Spirocera lupi en Yucatan, Mexico, y ademas, se reportan los casos registrados en dos laboratorios durante 18 anos de estudios parasitologicos y de necropsias (2000-2017). Materiales y metodos. Para el primer caso, se incluyen hallazgos de necropsia, histologicos y parasitologicos. Para los estudios retrospectivos se realizaron necropsias y estudios coprologicos de Flotacion Centrifugada y de McMaster. Resultados. En el paciente del estudio de caso, durante la necropsia se observaron tres nodulos esofagicos que al realizar la incision de los mismos, se visualizaron nematodos que correspondieron a S. lupi. En el estudio histologico se observo un granuloma eosinofilico que en su interior contenia el nematodo rodeado por un infiltrado inflamatorio moderado que estaba constituido por neutrofilos, eosinofilos, linfocitos, celulas plasmaticas y macrofagos; delimitado por una capsula de tejido conectivo fibroso. En el estudio retrospectivo se encontraron prevalencias de 0.18 y 0.48% mediante pruebas coprologicas y estudios de necropsias, respectivamente. Conclusiones. Spirocerca lupi se encuentra presente en perros de Yucatan, Mexico. Por lo tanto, seria importante considerar esta patologia para el diagnostico diferencial de problemas esofagicos y respiratorios en caninos. EnglishABSTRACT Objective. To describe the case report of a parasitized doq with Spirocera lupi in Yucatan, Mexico, as well as report cases reqistered in two laboratories durinq 18 years of parasitoloqical and necropsy studies (2000-2017). Materials and methods. A case study is reported, with necropsy, histologica! and parasitological findings. Likewise, a retrospective study of cases reported in two laboratories where necropsies and faecal Flotation techniques (centrifuqal and McMaster) were performed. Results. At the necropsy of the doq, three esophaqeal nodules were observed, which showed nematodes of S. lupi durinq the incision of the mass. The histoloqical study showed an eosinophilic qranuloma that contained the nematodes at its center, surrounded by a moderate inflammatory infiltrate formed by neutrophils, eosinophils, lymphocytes, plasma cells and macrophages, delimited by a capsule of fibrous connective tissue. In the retrospective study, prevalence of 0.18 and 0.48% were found by coproloqical tests and necropsy study, respectively. Conclusions. Spirocerca lupi is present in doqs from Yucatan, Mexico with low prevalence, producinq in the esophaqus of doqs lesions characterized by eosinophilic granulomas. The need to include this pathology in the differential diagnosis of esophaqeal and respiratory problems in doqs is disclosed.

Spirocerca lupi en perros de Yucatán, México: Reporte de caso y estudio retrospectivo