Cutaneous fungal Infections Flashcards
Which 3 types of fungi commonly cause skin infection?
Dermatophytes: Tinea (Ringworm)
Yeasts: Candida albicans
Moulds: Aspergillus
2 common features of fungal skin infection presentation
Itchy
Unilateral/ asymmetrical
3 features of Tinea Pedis
Most common dermatophyte infection
Moist scaling + fissuring in toe-webs
Spreads to sole + dorsum of foot
How is dermatophyte infection most commonly acquired?
Contact with keratin debris carrying fungal hyphae
3 features of Tinea Cruris
M > F
Scaly erythematous margin spreads down medial thighs, may extend back to perineum + bum
Source often feet
2 features of Tinea Corporis
Clearly defined raised, scaly edge
Annular lesions on trunk + limbs
Presentation of Tinea Manuum
Palm: mild scaling erythema
Dorsum: inflammatory change with well defined edge
3 features of Tinea Unguium
Common + associated with athletes foot
Starts distally with yellow streaks in nail plate
Whole nail thickens, discolours, friable
4 features of Tinea Capitis
Kids > Adults
>,1 patches of partial hair loss
Scaly + hair broken off just above surface
+/- Inflammation/ pustule formation
3 features of Kerion
Severe inflammatory scalp ringworm
Pustules + Abscesses
Often fungus of Cattle ringworm
3 features of Cattle ringworm
Affects face + forearms
Marked inflammatory reaction
Young farmers/ kids visiting farms at risk
3 features of Tinea Incognito
Fungal infection appearance altered by inappropriate tx with topical steroids
Top. steroids suppress inflammatory response to fungus
Scaly erythematous margin disappears leaving ill-defined patchy scaling erythema studded with pustules
Ix for suspected dermatophyte infection
Skin scrapings, nail clippings + plucked hair
Tx for dermatophyte infection
Small: Terbinafine TOP
Extensive/ Nails: Terbinafine PO
Tx for tines capitis
1: Griseofulvin PO (Safe for kids)
2: Terbinafine/ Itraconazole PO