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Cutaneous paecilomycosis in a cat.

Edmund J Rosser¹

¹Department of Small Animal Clinical Sciences, Veterinary Medical Center, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan 48824-1314, USA.

Journal of the American Animal Hospital Association

|January 23, 2004

Summary

A cat experienced recurrent swelling due to Paecilomyces lilacinus infection. Aggressive treatment with itraconazole and surgery successfully resolved the mycotic granuloma.

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Area of Science:

Veterinary Mycology
Feline Infectious Diseases

Background:

Recurrent soft-tissue swelling in cats can indicate underlying infections.
Paecilomyces lilacinus is a fungus that can cause opportunistic infections.

Observation:

A cat presented with a 2-year history of recurrent soft-tissue swelling in the left metacarpal region.
Initial cultures identified Paecilomyces lilacinus, and histopathology revealed a nodular mycotic granuloma.

Findings:

Treatment with itraconazole (10 mg/kg) for 60 days was initiated.
A lip swelling occurred 3 months post-treatment, requiring further surgical intervention and debridement.
An escalated itraconazole dosage (20 mg/kg) for 4 months resulted in a curative outcome.

Implications:

This case highlights the importance of fungal cultures in diagnosing persistent soft-tissue swellings in cats.
Aggressive and prolonged antifungal therapy, combined with surgical management, may be necessary for challenging mycotic infections.
Paecilomyces lilacinus should be considered in the differential diagnosis of granulomatous lesions in felines.

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