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?
- Honey-colored crusted superficial skin lesions
- What organisms most commonly cause impetigo?
- Staphylococcus aureus and Streptococcus pyogenes
- What deeper bacterial skin infection involves the dermis and subcutaneous tissue with poorly demarcated borders?
- Cellulitis
- What bacterial skin infection presents with a sharply demarcated, raised, red, painful area, often on the face or legs?
- Erysipelas
- What organism most commonly causes erysipelas?
- Streptococcus pyogenes (group A strep)
- What rapidly progressive, life-threatening infection destroys fascia and subcutaneous tissue?
- Necrotizing fasciitis
- What classic exam finding suggests necrotizing fasciitis rather than simple cellulitis?
- Pain out of proportion to the visible skin findings
- What bacterial infection of the hair follicle presents as a tender red papule or pustule?
- Folliculitis
- What is a furuncle?
- A deep infection of a hair follicle that forms a painful nodule, commonly called a boil
- What is a carbuncle?
- 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?
- Tinea versicolor (pityriasis versicolor)
- What dermatophyte infection of the scalp is common in children and can cause patchy hair loss?
- Tinea capitis
- What dermatophyte infection affects the feet and classically causes itching and scaling between the toes?
- Tinea pedis (athlete's foot)
- What dermatophyte infection of the groin causes an itchy, erythematous rash that spares the scrotum?
- Tinea cruris (jock itch)
- What is the classic appearance of a tinea corporis lesion?
- An annular, scaly plaque with central clearing and an active, raised border
FlashKeepers