skin infections Flashcards
bacterial infections
- boils (furuncles)
- carbuncles
- cellulities
- impetigo
- leprosy
- lyme disease
- staph and strep
- syphilis
fungal
- ringworm
- candidiasis
- oral thrush
parasitic
-lice
viral
- molluscum contagiosum
- shingles
- chicken pox
- warts
- measles
- h/f/m disease
degree of hair follicle infection
folliculitis => furuncles (boils) => carbuncles
major skin infection pathogen
staph aureus
virulence factors of staph aureus and s pyogenes
- cell wall and capsule components
- enzymes, toxins, hemolysins
- s aureus has protein A
dental procedure prophy can be
a risk factor for s aureus infection
MRSA
-hospital acquired (nosocomial)
the 5 C’s with ca-mrsa
- Crowding
- frequent skin Contact
- Compromised skin
- sharing Contaminated personal care items
- lack of Cleanliness
at risk of ca-mrsa
-children < 2 years old
-minority pop
-athletes contact sports
-injection drug users
etc.
impetigo
- Group A strep (GAS)
- s aureus
- children 2-5 years
- face and legs
erysipelas
- GAS
- infants and >30 years
- face
cellulitis
- subcutaneous tissue
- GAS
- S aureus
another name for GAS
strep pyogenes
GAS
- beta hemolytic
- catalase NEGATIVE
- s aureus is catalase +
GAS is sensitive to
penicillin
predisposing factors for s pyogens
- age
- exposure to children
- # people in home
- HIV
- chronic diseases
- injection drug
- alcoholism
- cortico use
- indigenous ppl
syndromes that are secondary to local skin infections
- staph scalded skin syndrome (SSSS)
- toxic shock syndrome (TSS)
SSSS
- exfoliatin toxin from S aureus
- infants and children
- skin-burn-like rash
Staphylococcal TSS
- 95% cases in young women
- menstruation, tampon use, surgery, child birth, abortion
- red, sunburn-like rash
- vaginal discharge
streptococcal TSS
- any age group
- minor injury
- petechiae rash
- effects soft tissue (fascilitis, myositis, cellulitis), pharyngitis
pathogens that cause a skin infection secondary to bloodstream infection
- s aureus
- s pyogens
- pseudomonas aeroginosa
- treponema pallidum
- borreliella
s aureus
- tss
- scalded skin syndrome
- janeway lesions
- scarlet fever (tongue, face)
s pyogens
- tss
- scarlet fever *strawberry tongue
pseudomonas aeruginosa
-ecthyma gangrnosum (black ulcers)
treponema pallidum
syphilis (genital for primary, oral for secondary)
borreliella burgdorferi
-lyme disease
ringworm
- moist skin
- immunodeficiency
- extremely common
molluscum contagiosum
- viral (pox virus)
- “water warts”
- highly contagious
warts (verrucae vulgaris)
- hard growths
- extremely common
- human pappillomavirus
hand food and mouth disease
- painful, blister-like lesions
- cheek, gingiva, tongue
- outbreaks in childcare centers
- spread by oral ingestion of virus
- coxsackie virus A16
chicken pox (varicella)
- vaccine
- highly contagious
- cause by varicella zoster virus (vsv)
shingles
- also caused by vsv
- dormant after chicken pox
- 5 year vaccine
- chicken pox but more painful
measles (rubeola)
- koplik’s spots oon inner cheeks
- highly contagious
- measles virus
