A 5-year-old pregnant Spanish thoroughbred mare was presented with an extensive granulomatous lesion, of four months duration, on the left medial foreleg. On examination, the wound was covered by a large mass of ulcerated granulation tissue exuding thick serosanguinous fluid. The mare had not responded to previous treatment. Physical examination revealed no fever, no lameness and the presence of intense pruritus. A surgical resection was carried out to take samples for histopathology. On histopathologic examination the dermis and subcutaneous tissue showed large multifocal necrotic eosinophilic areas and inside these areas, irregularly ramified fungal hyphae. Microbiological examination showed abundant fungal growth and the strain corresponded to Absidia corymbifera. Treatment with amphotericin B was started but there was no improvement in the lesion. The mare aborted, became anorexic, had febrile episodes, had very poor body condition and was euthanized.
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