In this retrospective study, the clinical and anatomopathological findings of fungal diseases in dogs and cats in Northeastern Brazil are described. During the study period, 6,827 histopathological examinations (4,090 necropsies and 2,737 biopsies) of companion animals were reviewed, and fungal infections were diagnosed in 54 cases. Of these, 32 cases were diagnosed in cats and 22 in dogs. Sporotrichosis was the most prevalent mycosis (19/54), followed by dermatophytosis (9/54), cryptococcosis (8/54), candidiasis (7/54), and phaeohyphomycosis (4/54). Other diseases had two cases each, including aspergillosis, mucormycosis, and histoplasmosis, whereas coccidioidomycosis occurred once. Mycoses were diagnosed through microscopic lesions associated with the histomorphological characteristics of the agent, as evidenced by routine and special histochemical stains. They were occasionally confirmed by immunohistochemistry and microbiological cultivation. This retrospective study showed that despite being uncommon, fungal diseases are important causes of death in dogs and cats in the region, with cats being the most affected species and sporotrichosis being the most prevalent mycosis. Clinical signs were correlated with the portal of entry of the infection associated with localized or disseminated superficial and deep skin lesions or affecting parenchymal organs, especially in systemic infections. Microscopic lesions were mainly characterized by pyogranulomatous inflammation associated with fungal structures. In dogs, mycoses occurred mainly owing to an immunological impairment secondary to canine distemper virus co-infection.

El granuloma eosinofílico se caracteriza por una infiltración celular densa de eosinófilos, macrófagos y mastocitos, además de focos de colagenólisis. El granuloma eosinofílico canino es una rara enfermedad inflamatoria de la piel que afecta la mucosa oral. Sin embargo, la forma cutánea es más evidente y puede estar en el escroto, los testículos, el perineo y los flancos. La etiología del granuloma eosinofílico en perros no está clara, pero los procesos alérgicos pueden originar nódulos o placas granulomatosas. Los perros afectados pueden presentar picazón, hinchazón y, ocasionalmente, dolor. El análisis histopatológico es necesario para el diagnóstico definitivo. El presente informe del caso describe un perro macho de 12 años, Poodle, con antecedentes de hinchazón, picazón y dolor en el escroto. La estadificación clínica completa se realizó mediante recuento sanguíneo, análisis bioquímico, radiografías torácicas, ultrasonido abdominal y electrocardiograma. El perro fue sometido a extracción quirúrgica seguida de evaluación histopatológica. El granuloma eosinofílico debe incluirse en el diagnóstico diferencial de las masas solitarias en la región escrotal.

No abstract