derma-fungal infection Flashcards
Superficial infection caused by dermatophytes
Dermatophytosis
Mimics Lentiginous melanoma
T. Nigra
Fungal infection caused by any fungi
Dermatomycosis
Have the ability to form molecular attachments to keratin and use it as a source of nutrient which allows them to colonize keratinizing tissue
Dermatophytes
T or F: geophilic infection is non inflammatory
False. Infection is inflammatory
Most common geophilic dermatophyte
Microsporum gypseum
T or F: zoophilic species are found in animals, but also in human
True
Favored site of zoophilic infection
Scalp, beard, face, arms
Inflammatory dermatophytes are most commonly produced by geophilic/zoophilic/anthropophilic
Zoophilic sp
Geophilic and zoophilic are sporadic, whereas anthropophilic is
Epidemic
Ectothrix with yellow green fluorescence
M. Audouinii
M. Canis
M. Ferrugineum
Endothrix with dull gray-green fluorescence
T. Schoenleinii
Most common cause of t. Capitis in US
T. Tonsurans (no fluorescence)
T or F: only the severity Of dermatophytosis is increased with immunodeficiency, not the prevalence
True
Dermatophyte infxns are more common on m/f
Male
T. Tonsurans is more common in m/f
Female
Ecto/endothrix: small or large anthroconidia forming a sheath around the hair shaft
Ectothrix
Ecto/endothrix: anthroconidia within the hair shaft
Endothrix
3 steps of dermatophyte infection
- Adherence to keratinocytes
- Penetration thru and between cells
- Development of host response
Etiology of t. Capitis
M. Canis
Etiology of t. Favosa
T. schoenleinii
Etiology of t. Barbae
T. Mentagrophytes
T. Verrucosum
Etiology of t.corporis
T. Rubrum
Etiology of t. Umbracata
T. Concentricum
