Cutaneous / Superficial / Subcutaneous Mycoses Flashcards
Cutaneous Mycoses
- Dermatophyte genera- filamentous
- various forms are referred to as “tineas” or ringworm
Dermatophytic Classificiation & Morphology
MET
- Microsporum
- Epidermophyton
- Trichophyton
Microsporum
- multicelled macroconidia with thick, rough walls
Epidermophyton
- microconidia absent
- macroconidia typically club-shaped, with thin, smooth walls
Trichophyton
- microconidia are usually absent
- macroconidia absent or present in small numbers
: when present- pencil-shaped and thin, with smooth walls
Dermatophyte: Epidemiology & Transmission
- infection is from arthroconidia or hyphae transfer, or skin material containing those elements from infected host
- dermatophytes remain visible in lost skin scales or hair for long periods
- infection either by direct contact or indirect (via fomites)
Dermatophytosis: Tineas
BCCCUP
- Tinea barbae
- Tinea capitis
- Tinea corporis
- Tinea cruris
- Tinea unguium
- Tinea pedis
Tinea barbae
: location
: dermatphyte morphology
- beard
- trichophyton
Tinea capitis
: location
: dermatophyte morphology
- scalp, eyebrows, eyelashes
- trichophyton & microsporum
Tinea corporis
: location
: dermatophyte morphology
- smooth skin
- any dermatophyte
Tinea cruris
: location
: dermatophyte morphology
- groin
- trichophyton & epidermophyton
Tinea unguium
: location
: dermotophyte morphology
- nails
- trichophyton
Tinea pedis
: location
: dermatophyte morphology
- foot
- trichophyton & epidermophyton
Infection with dermatophyte is most often associated with?
a. fecal-oral transmission
b. adherence of the organism to perspiration moist skin
c. inhalation of the organism from contaminated feces
d. intravenous drug abuse
b. adherence of the organism to prespiration moist skin
