MYCOVIRO - CH 60 PPT Flashcards
Microscopic Examination of Cultures (3)
Tease Mount
Cellophane Tape Preparation
Microslide Culture
Superficial Mycoses
- tinea versicolor
- lipophilic
Malassezia furfur
Superficial Mycoses
- black piedra
Piedraia hortae
Superficial Mycoses - tinea nigra
- annelid formation
Exophiala werneckii
Superficial Mycoses
- white piedra - arthroconidia
Trichosporon beigelii
- spaghetti and meatballs
Malassezia furfur
type of ringworm
scalp/head
tinea capitis
type of ringworm
head
tinea favosa (favus)
type of ringworm
beard
tinea barbae
type of ringworm
body
tinea corporis
tinea imbricata
type of ringworm
hand
tinea manuum
type of ringworm
nails
tinea unguium
type of ringworm
groin
tinea cruris
type of ringworm
feet
tinea pedis
dermatophyte that infects skin and hair
Genus Microsporum
dermatophyte Zoophilic Spindle shaped echinulate macroconidia Microconidia are rare Grows on rice
M. canis
dermatophyte
Bamboo hyphae
M. ferruginum
dermatophyte
Thick walled macroconidia
M. gypseum
dermatophyte
does not grow on rice
M. audouinii
dermatophyte
Favic chandeliers, pectinate bodies
M. audouinii
- infects the skin and nails
Genus Epidermophyton
No microconidia
E. floccosum
Beaver-tail macroconidia (spatulate/club-shaped)
E. floccosum
- infects skin, hair, and nails
Genus Trichophyton
agent of tinea imbricata
T. concentricum
most common cause of athlete’s foot
T. mentagrophytes
Cigar-shaped macroconidia
T. mentagrophytes
5 day Urease(+) Hair penetration (+)
T. mentagrophytes
Red pigment in undersurface of colony
T. rubrum
Pencil-shaped macroconidia
T. rubrum
5 day urease (-) Hair penetration (-)
T. rubrum
Macroconidia are rare (balloon forms)
T. tonsurans
Rat tail macroconidia
T. verrucosum
causes tinea favosa
T. schoenleinii
favic chandeliers and chlamydospores
T. schoenleinii
Colonies are purple
T. violaceum
Swollen hyphae w/ granules
T. violaceum
- associated with gardening (rose handler’s disease, gardener’s disease)
Sporothrix schenckii
Lesions may be confined to the site of inoculation or spread along lymph channels
Sporothrix schenckii
Cigar shaped yeasts
Sporothrix schenckii
Rosette/flowerette conidia
Sporothrix schenckii
Subcutaneous Mycoses
- caused by dematiaceous molds
Chromoblastomycosis
Subcutaneous Mycoses
- direct exam reveal sclerotic / copper bodies
Chromoblastomycosis
Subcutaneous Mycoses
- comparison of color, size, and texture of granules is helpful
Eumycotic Mycetoma
Subcutaneous Mycoses
- Most common in the US
Pseudallescheria boydii
lesions may simulate chromoblastomycosis
Subcutaneous Phaeohyphomycosis
Most common agents of Subcutaneous Phaeohyphomycosis
Exophiala jeanselmei
Wangiella dermatitidis
All are dimorphic
Endemic Mycoses
Endemic Mycoses all acquired via
inhalation of infectious conidia
- detects cell free antigens from mycelial/mold forms
Exoantigen test
