Fungal Classification, Aspergillus, Candida Flashcards
Describe the morphology of yeasts.
Single cells
May see pseudohyphae
What determines if dimorphic fungi are in their yeast or mold form?
Temperature
Yeasts at 37ºC (mammalian/avian body temperature)
Molds at 25ºC (environment)
What disease patterns are caused by members of the genus Candida in birds and pigs?
Thrush, mycotic alimentitis
How is candidasis treated?
First, correct predisposing conditions
Fluconazole, miconazole, flucytosine
Topical- chlorahexidine, nystatin, selenium sulfide, povidone-iodine, copper sulfate
What breeds of dog are at higher risk of nasal aspergillosis?
What breed is at higher risk of systemic/disseminated aspergillosis?
Nasal aspergillosis- long-nosed breeds
Systemic/disseminated aspergillosis- German Shepherds
What is the treatment for guttural pouch mycosis?
Prolonged itraconazole treatment
What disease patterns do members of the genus Aspergillus cause in dogs?
Nasal aspergillosis
Systemic disease- can spread to retina, myocardium, kidney, meninges, bones, etc.
What disease patterns are caused by members of the genus Candida in horses and cattle?
Gastroesophageal candidasis
What is the treatment for canine nasal aspergillosis?
Itraconazole or fluconazole for long periods
Systemic and topical antifungals
What disease patterns do members of the genus Aspergillus cause in birds?
Severe mycotic pneumonia and air sacculitis (“brooder pneumonia”)
What disease patterns do members of the genus Aspergillus cause in horses?
Pulmonary aspergillosis, guttural pouch mycosis
What disease patterns are caused by members of the genus Candida in dogs and cats?
Exfoliative dermatitis of the feet, muzzle, inguinal area, and scrotum with seborrhea, pruritis, and alopecia
Describe the morphology of molds.
Multicellular, contain filamentous hyphae with condida (reproductive structures)
Hyphae can be clear or white (hyaline) or dark (dematiaceous)
What is the treatment of keratomycosis caused by Aspergillosis?
Debridment, topical antifungals
