Mycology Flashcards
Exophiala wereneckii
“Tinea nigra”
Black/brown spots on palms
ID: Young = yeast like, shiny, black, two-celled conidia
Piedra hortae
“Black Piedra”
Nodules on hair shaft
slow grower
ID: thick-walled, chlamydoconidia
Malassezia furfur
“Pityriasis versicolor”
scaly patches of different colors
ID: Fluoresces POSITIVE under Wood’s Lamp, Spaghetti and Meatballs appearance
Trichosporon beigelii
“White Piedra”
Nodules on hair shaft (does not attach and firmly as Black Piedra)
ID: Blasticonidia and Arthroconidia
Tinea capitis
Head
Tinea barbae
beard
Tinea corporis
trunk of body
Tinea cruris
inguinal
Tinea pedis
feet
Tinea mannum
hand
Tinea unguium
nails
Microsporum canis
From cats/dogs
skin/scalp
ID: Long, spindle shape with >6 compartments
Microsprum gypseum
skin/scalp
ID: spindle macroconidia with <6 compartments
Epidermophyton floccosum
nails/skin
ID: club-shaped with 2-6 cells
Trichophyton mentagrophytes
skin/scalp
Urea +. Hair perforation +
ID: spiral hyphae, round microconidia in bunches, “grape like clusters”
Trichophyton rubrum
nails/skin
ID: pyriform, “birds on a wire”
Urea - , Hair perforation -
Trichophyton tonsurans
skin/nails
ID: variable shaped conidia
Urea +
Trichophyton schoenleinii
scalp infections and hair loss
ID: “favic chandeliers” (deer antlers)
Disease: cup-shaped crusts
TX for cutaneous mycoses
Miconazole (topical)
ketoconazole (topical)
Amphotericin B
Fluconazole
Histoplasma capsulatum
Disease: pulmonary, leading to systemic ; Bird and Bat feces (chicken coop, bat cave)
Location: MO, MS, Ohio River Valley
Colony: slow grower, white, cottony (yeast like at body temp 35-37)
ID: large, thick walls, spiny balls
Blastomyces dermatitidis
Diease: Lesions on body, begins in lungs, going to skin/bones
Colony: white cottony at 25-30 degrees (yeast like at 35-37 body temp)
ID: Broad Based Buds in yeast form ; “lollipop” in fungal form
Paracoccidiodes brasilensis
Disease: South America
Colony: slow grower, brown-ish
ID: thick-walled attached by THIN connections “Ships Wheel”
Coccidioides immitis
Disease: San Joaquin Valley Fever (AZ, CA… inhale arthroconidida)
Colony: white, cottony, moderate grower
ID: Barrel shaped arthroconidia, thick walled
Sporothrix schenckii
Disease: Skin lesion, becoming systemic ; traumatic implantation with contaminated soil ; “Drunken Rose Gardener’s Disease”
Colony: white to black
ID: black, slender, tapered conidiophores with pear-shaped conidia with thread-like denticles, “rosettes”
When it’s yeast-like, it makes “cigar bodies”
