Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
24 Cards in this Set
- Front
- Back
|
acral
|
on distal extremities: hands and feet
|
|
|
arcuate
|
in an arc or curve (side of foot)
|
|
|
early treatment with these can decrease length of eruption and post-herpetic neuralgia
|
acyclovir and valacyclovir
|
|
|
HSV1 favors
|
mouth and nose
|
|
|
HSV2 favors
|
genitalia, buttocks, and thigh
|
|
|
perianal erosions or ulcerations in immunosuppressed are usually
|
HSV
|
|
|
beside scraping and micro exam- cannot differentiate btwn VZV and HSV and is somewhat unreliable. hard to standardize. looks for multinucleated giant cells
|
Tzanck prep
|
|
|
can be performed when there is fluid present, but is less helpful when crusts have formed. results in 1-3 weeks. not as helpful for VZV
|
viral culture
|
|
|
can differentiate HSV1 and 2, as well as VZV. like Tzanck prep, scrape base of vesicle or erosion. results in 48 hours
|
direct fluorescent antibody (DFA) test.
relevance limited for HSV bc antibody detection determines past exposure, but may not directly relate to clinical findings |
|
|
rapid and sensitive diagnostic test that differentiates HSV1, HSV2, and VZV- initial test of choice at UNC
|
fluid swab for PCR
|
|
|
HSV treatment
|
acyclovir is safe, cheap, and reliable. can be used episodically and prophylactically. can be used in pregnancy. famciclovir and valacryclovir are more expensive but have easier dosing
|
|
|
pruritic vesiculopapules on palms, soles, and sides of fingers. after healing, leave behind a mark with a mahogany color = post-inflammatory hyperpigmentation
|
dyshidrotic eczema (pompholyx).
many pts have hx of atopic dermatitis and/or coexisting tinea pedis. mainstay of rx is potent topical steroids |
|
|
vesicles on dorsal foot
|
contact dermatitis, insect bites
|
|
|
vesicles on sides of feet and toes
|
dyshidrotic eczema
|
|
|
vesicles on soles
|
tinea pedis (often w/ scaling and interdigital maceration)
|
|
|
vesicles on balls or heels
|
friction blisters
|
|
|
vesicles on mouth/nose/eyes
|
HSV, bullous impetigo
|
|
|
vesicles on fingers
|
dyshidrotic eczema, contact dermatitis, herpetic whitlow (HSV)
|
|
|
vesicles on arms/legs
|
contact dermatitis
|
|
|
vesicles on feet
|
dyshidrotic eczema, tinea pedis, allergic contact dermatitis
|
|
|
if pain precedes onset:
|
HSV, VZV
|
|
|
if itch precedes onset:
|
allergic contact dermatitis, dyshidrotic eczema, VZV
|
|
|
if trauma precedes onset:
|
friction blister, pressure ulcer, cryotherapy
|
|
|
recurrent blisters
|
HSV
|
