Flashcards in DD Cutaneous Infxns and Infestations Deck (12):
Alpha-defensins (hNP1, hNP2),
Psoriasin and RNase7
What smear do you use to dx HSV and VZV?
Tzanck preparation (smear - look for multinucelated keratinocytes and large vesicular nuclei in keratinocytes),
Non bullous impetigo most likely caused by
strep since it is non bullous (maybe staph)
- If bullous impetigo then suspect Staph aureus (scalded skin)
Who is at increased susceptibility of getting cellulitis?
very young, old, immunocompromised, IV drug users, pts w/chronic ulcers.
Cliff drop border
St. Anthony's fire
primary lesion is tender, illdefined area, erthematous, painful, variable lymphadenopathy, streaking.
Papule breaks down to ulcer -->
Non- tender ulcer
Heals 3-6 weeks
- Dx syphilis
KOH exam to look for what?
Hyphae of arthrospores
indicating fungal infxn - ie dermatophyte, candidiasis
Food source of Tinea Versicolor
Tinea (Pityriasis) Versicolor show as hypopigmented patches bc?
production of azelaic acid that inhibits function of tyrosine produced by melanocytes.
Scabies life cycle
30 day lifecycle w/ female laying down 60 to 90 eggs that mature in approximately 10 days.