Flashcards in Infectious rashes Deck (24):
what is petechiae
pinpoint non-blanching spots
what is purpura
larger non-blanching spots (>2mm)
what virus causes measles?
what are the other names for slapped cheek?
what causes hand foot and mouth disease?
coxsackie A virus
what is another name for rubella?
Describe the rash in fifth disease
Erythema on cheeks
Later macular lacey rash- on Arms/legs/trunk
what are the typical associated features with rubella rash?
Tender swollen glands
describe measles rash
Non itchy rash
Covers all body- confluent rash
Avoids palms and soles
what are some other signs and symptoms seen with measles?
what are the complications of measles?
what causes molluscum contagiosum?
describe meningococcal rash?
May appear like large bruise
what are the key complications of meningococcal infection?
--> therefore is a medical emergency
describe the lesions often seen in hand foot and mouth disease?
intense yellow-grey vesicles over hands, feet, and can be inside mouth
describe progression of rash in chicken pox
Begins as red papules
Progresses to fluid filled vesicles/blisters
Varying sizes of lesions
Scabs form after blisters burst
how might we diagnose measles?
Nasopharyngeal swab + throat swab--> PCR
Serology IgM and IgG
what type of hsv causes lesions on the lips and what type of HSV causes lesions in the genital area?
HSV1- orolabial lesions
HSV2- genital herpes; but now HSV1 can cause genital herpes as well
where is the chickenpox rash usually located
usually located on the trunk (chest and back) and face, but then progresses down the arms and legs
complications of chickenpox?
secondary cellulitis infection
treatment of measles?
supportive management only
apart from being a feature of kawasaki disease, what other condition can 'strawberry tongue' be a feature of?
staph/strep toxin mediated syndrome
what is the difference between impetigo, erysipelas and cellulitis?
all forms of skin infections, and are caused by similar pathogens (staph and strep)
But their difference lies in which skin layer they affect.
Impetigo= superficial layer of skin
Erysipelas= upper dermis +/- lymphatics
Cellulitis= deeper dermis + subcutaneous fat