Bacterial, fungal, viral, and parasitic skin infections and infestations matched with their hallmark presentation tested on USMLE Step 1.
35 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the classic description of impetigo lesions?
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Honey-colored crusted superficial skin lesions- What organisms most commonly cause impetigo?
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Staphylococcus aureus and Streptococcus pyogenes- What deeper bacterial skin infection involves the dermis and subcutaneous tissue with poorly demarcated borders?
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Cellulitis- What bacterial skin infection presents with a sharply demarcated, raised, red, painful area, often on the face or legs?
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Erysipelas- What organism most commonly causes erysipelas?
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Streptococcus pyogenes (group A strep)- What rapidly progressive, life-threatening infection destroys fascia and subcutaneous tissue?
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Necrotizing fasciitis- What classic exam finding suggests necrotizing fasciitis rather than simple cellulitis?
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Pain out of proportion to the visible skin findings- What bacterial infection of the hair follicle presents as a tender red papule or pustule?
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Folliculitis- What is a furuncle?
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A deep infection of a hair follicle that forms a painful nodule, commonly called a boil- What is a carbuncle?
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A coalescence of multiple furuncles into a larger, deeper inflammatory mass- What superficial fungal infection, caused by Malassezia, produces hypopigmented or hyperpigmented patches on the trunk?
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Tinea versicolor (pityriasis versicolor)- What dermatophyte infection of the scalp is common in children and can cause patchy hair loss?
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Tinea capitis- What dermatophyte infection affects the feet and classically causes itching and scaling between the toes?
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Tinea pedis (athlete's foot)- What dermatophyte infection of the groin causes an itchy, erythematous rash that spares the scrotum?
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Tinea cruris (jock itch)- What is the classic appearance of a tinea corporis lesion?
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An annular, scaly plaque with central clearing and an active, raised border
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