Funguses commonly cause superficial skin diseases in cats but are responsible for severe and often fatal systemic infections. The most common and least pathogenic fungus which affects cats is Microsporum canis, causing Ringworm.
Other fungi are cultured included Aspergillus spp, Penicillium spp, Cladosporium spp, Scopulariopsis spp and lipophilic yeasts of the genus Malassezia spp. Paronychia is usually caused by Malassezia spp yeast.
Cats infected with FIV or FeLV may have a greater diversity of cutaneous and mucosal mycoflora than noninfected cats. However, infected cats may be no more likely than noninfected cats to expose humans to zoonotic fungi such as Cryptococcus spp and Microsporum spp. A greater diversity of fungal genera was isolated from retrovirus-infected cats, and Malassezia spp were more commonly recovered from these cats, compared with noninfected cats.
Antifungal therapy must address the causative organism, the organ(s) involved and the susceptibility of the fungus to the particular drug chosen.
|Aphanoascus fulvescens||commensal, nonpathogenic|
|Aspergillus spp||naso-orbital abscesses|
|Colletotrichum spp||local skin lesions|
|Cyniclomyces guttulatus||diarrhea, cholecystitis|
|Microsphaeropsis spp||skin lesions|
|Malassezia spp||otitis externa, paronychia|
|Mucor amphibiorum||nasal nodules, meningitis|
|Penicillium spp||naso-orbital abscesses|
|Pythium spp||naso-orbital abscesses|
|Rhinosporidium spp||tumour-like growths resembling nasopharyngeal polyps|
Phaeohyphomycosis - opportunistic dematiaceous fungi
1. August, JR (2006) Consultations in Feline Internal Medicine, Vol 5. Elsevier Saunders