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, histológica! 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 infíltrate 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.

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