Question | Answer |
What are the most common fungal organisms associated with superficial fungal infections? | Malassezia globosa furfur |
What are the most common fungal organisms associated with cutaneous fungal infections? | trichohyton, epidermophyton, microsporum |
What are the most common fungal organisms associated with subcutaneous fungal infections? | fonsecaea pedrosi, cladosporium carrionii, phialophora verrucosa |
What is the clinical presentation of pityriasis versicolor? | scaly lesions with no inflammatory response |
What is the pathogenesis of pityriasis versicolor? | lipophilic yeast, sweat, sebum for moisture and nutrition |
What is the epidemiology of pityriasis versicolor? | tropical (chronic), or summer |
What is the clinical presentation of tinea nigra? | brown/black macular lesions. Usually on hands or feet. Resumbles melanoma. Non scaling, non inflammatory. |
What is the pathogenesis of tinea nigra? | brown black pigmented yeasts , exophiala werneckii |
What is the epidemiology of tinea nigra? | found in soil, shower curtains |
What is the clinical presentation of black piedra? | infection on external hair shaft, black nodules |
What is the pathogenesis of black piedra? | piedraia hortae |
What is the epidemiology of black piedra? | tropical |
What is the clinical presentation of white piedra? | infection on external hair shaft, white nodules |
What is the pathogenesis of white piedra? | trichosporon beigelli |
What is the epidemiology of white piedra? | tropical |
What is the clinical presentation of the dermatophytoses? | Metabolize keratin, inflammatory response |
What is the pathogenesis of the dermatophytoses? | trichophyton, epidermophyton, microsporum |
What is the epidemiology of the dermatophytoses? | ringworm, |
What is the clinical presentation of chromoblastomycosis? | wart-like califlower, pigmented lesions, usually of the foot |
What is the pathogenesis of chromoblastomycosis? | fonsecae pedrosi, cladosporium carrionii, phialophora verrucosa |
What is the epidemiology of chromoblastomycosis? | bare footed workers, tropical disease, soil, may take years to develop |
What is the clinical presentation of sporotrichosis? | ulcerative papule, spreads via draining lymph channels, nodular granulomas, chronic |
What is the pathogenesis of sporotrichosis? | sporothrix schenckii, most common in US |
What is the epidemiology of sporotrichosis? | common in US |
What is the clinical presentation of fungal mycetoma? | small painless papules and nodules, sinus tract formation leads to spread, deeper tissue infiltration. Can lead to bone destruction over a period of months or years |
What is the pathogenesis of fungal mycetoma? | pseudoallescheria boydii, madurella mycetopatis |
What is the epidemiology of fungal mycetoma? | infection via thorns and splinters. |
What infection looks like "spaghetti and meatballs?" | pityriasis or tinea versicolor |
What is the significance of "ids?" | papular eruption at a distant sight from the fungal lesions. No fungus is in the lesion, so it is considered a type of allergic reaction to the presence of the fungus |
What infection is associated with "copper penny spores?" | chromoblastomycosis |
What infection is associated with "asteroid bodies?" | sporotrichosis |