Periódicos Brasileiros em Medicina Veterinária e Zootecnia

p. 01-04

Demodicose bovina associada a carcinoma de células escamosas na vulva

Gomes Olinda, RoberioTalita Soares Frade, MariaSilmara Leite Soares, GliereMaria Nascimento de Aguiar, GildeniMedeiros de Mendonça Costa, ValériaFlavio Medeiros Dantas, AntônioBarbosa de Lucena, Ricardo

Background: Demodicosis in cattle is caused by the mite Demodex bovis, mostly found in hair follicles. In general, this parasitic disease presents subclinically with small lumps on the skin; it can occur widely and cause serious economic losses owing to the resulting low quality leather. Demodicosis is relatively rare in farm animals, and data are scarce regarding epidemiological and pathological findings. Differential diagnoses for demodicosis in cattle should include sarcoptic, psoroptic, and chorioptic management; photosensitivity; urticaria; parakeratosis from zinc defi ciency and dermatophilosis. The aim of this study is to report a case of demodicosis associated with squamous cell carcinoma of the vulva of a cow in the semiarid region of Paraíba, Brazil.Case: A 3-year-old mixed Holstein-Friesian cow was referred to the Veterinary Hospital of the University Federal of Campina Grande. The animal showed a proliferative and ulcerated sore on the vulva draining serous secretions. We performed an incisional biopsy of the affected area, and sent the tissue to the Laboratory of Animal Pathology for histological examination. The morphological diagnosis was squamous cell carcinoma. Furthermore, several mite specimens were associated with the neoplastic proliferation. Based on the poor prognosis after clinical evaluation, the animal was euthanized. At necropsy, the lesions were iden

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