Curvularia spp are an opportunistic fungus that is normally found in damp environments and rarely cause disease in dogs.
The incidence of these infections is greater in warm and humid climate, and immunocompromised dogs are predisposed.
Species which are pathogenic include:
Clinically affected dogs usually present with paronychia and ulcerated skin lesions, often with secondary bacterial infections. Focal areas of alopecia with papules and nodules with ulceration overlain by crusts are common, with lesions most prevalent on the dorsum and the lateral aspects of the trunk and extremities. Draining sinuses may occur within the skin, but visceral dissemination is rare.
Thick walled fungal hyphae are usually detected in impression smears from skin lesions. Staining with periodic acid-Schiff's stain is usually confirmatory.
Treatment with generalized phaeohyphomycosis usually requires parenteral amphotericin B or itraconazole.
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