Fungal infections

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Fungal diseases

This chapter relates to fungal infections as well as yeast and algae-related diseases in dogs.

Fungi commonly cause superficial skin diseases in dogs 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.

Dogs with immune-mediated hemolytic anemia or other causes of immunosuppression (e.g. long-term cyclosporin use) have a greater predilection for systemic disseminated disease.


Species Classification Normal location Disease in dogs
Acremonium spp fungus GI tract chorioretinitis, neurological disease
Alternaria spp fungus skin phaeohyphomycosis
Amanita phalloides mushroom oral mycotoxicosis
Aspergillus spp mold nasal passages, systemic nasal granuloma, aflatoxicosis, aspergillosis
Aureobasidium spp fungus skin phaeohyphomycosis
Basidiobolus spp fungus skin ulcers, systemic
Bipolaris spp fungus dermis phaeohyphomycosis
Blastomyces dermatitidis fungus systemic mastitis, pneumonia, lymphadenitis, endophthalmitis
Candida albicans yeast skin dermatitis
Chrysosporium spp fungus skin dermatitis
Cladophialophora bantiana marine fungus skin phaeohyphomycosis
Cladosporium spp mold skin ulcerative dermatitis, meningitis
Coccidioides spp fungus systemic coccidioidomycosis
Cokeromyces recurvatus mold GI tract diarrhea
Conidiobolus spp fungus skin, GI tract ulcers, systemic
Cryptococcus spp yeast nasal passages, systemic cryptococcosis
Curvularia spp mold skin phaeohyphomycosis
Cyniclomyces guttulatus yeast intestines diarrhea, hepatitis
Dactylaria spp fungus skin phaeohyphomycosis
Exophiala dermatitidis fungus skin, nasal cavity systemic abscess
Fusarium spp fungus skin, systemic skin ulcers, mycotoxicosis, infertility, meningoencephalitis
Geosmithia argillacea fungus skin disseminated infections
Histoplasma spp fungus skin, systemic systemic granulomas
Lagenidium caninum mold skin ulcers, lymphadenopathy
Lecythophora hoffmannii fungus skin osteomyelitis
Madurella spp fungus skin phaeohyphomycosis
Malassezia spp yeast skin otitis externa, paronychia
Microcystis aeruginosa alga gastrointestinal tract gastroenteritis
Microsphaeropsis spp fungus dermal phaeohyphomycosis
Microsporum spp fungus skin ringworm
Monocillium indicum mold respiratory lymphadenopathy, splenitis
Nodularia spumigena algae gastrointestinal gastroenteritis
Ochroconis gallopavum fungus skin phaeohyphomycosis
Oxyporus corticola fungus skin lymphadenopathy, osteomyelitis
Paecilomyces spp nematophagous fungus skin phaeohyphomycosis
Paracoccidioides brasiliensis yeast respiratory & GI tract lymphadenopathy, organomegaly
Penicillium spp fungus skin dermatitis, otitis externa, lymphadenopathy, bronchopneumonia, tremorgenic mycotoxicosis
Phialemonium curvatum fungus skin phaeohyphomycosis
Phialosimplex caninus fungus skin fatal phaeohyphomycosis
Pneumocystis carinii fungus respiratory tract pneumonia (Cavalier King Charles Spaniel)
Pochonia chlamydosporia fungus GI tract nonpathogenic symbiont of Toxocara canis
Prototheca spp algae skin systemic disease
Pseudallescheria boydii fungus skin phaeohyphomycosis
Pythium insidiosum water mold skin pneumonia, enteritis
Rhinosporidium seeberi fungus nasal passages rhinitis
Rhodotorula glutinis fungus skin epididymitis, superficial mycosis
Sagenomella chlamydospora fungus skin phaeohyphomycosis
Scedosporium spp fungus skin phaeohyphomycosis
Schizophyllum commune fungus skin osteomyelitis
Scopulariopsis spp fungus skin dermatitis
Sporobolomyces roseus yeast skin, aerosol meningoencephalitis
Torulopsis glabrata yeast skin dermatitis, meningitis
Trichophyton spp fungus skin ringworm
Westerdykella spp fungus skin disseminated infections, renal pyuria, discospondylitis
Xylohypha bantiana fungus skin phaeohyphomycosis