Dermatologic Infections Flashcards
(51 cards)
1
Q
What two organisms are responsible for most bacterial skin infections
A
-GABHS (group A beta hemolytic strep)
-staph aureus
2
Q
Characteristics of impetigo
A
- contagious, spreading, asymptomatic
- honey colored crusts
- occlusive vesicles
- consider wound culture
3
Q
What is this infectious condition
A
Impetigo
4
Q
Treatment for impetigo
A
- self-limiting
- topicals, washing, dilute bleach bath
- infection control
- return to school when crusts/bullae are gone
5
Q
What is this infectious condition
A
Folliculitis
6
Q
Characteristics of folliculitis
A
- bacteria, virus, fungus, parasite
- spa folliculitis: pseudomonas aeruginosa
- recent shave/hot tub
- erythematous plaques around follicles
7
Q
Folliculitis treatment
A
- self-limited
- soap, benzoyl peroxide
- proper shaving techniques
8
Q
What is this infectious condition
A
pseudofolliculitis barbae
9
Q
What is this infectious condition
A
abscess
10
Q
characteristics of an abscess
A
- painful, purulent, firm base with fluctuant center
- warm, tender
11
Q
What is this infectious condition
A
paronychia
12
Q
characteristics of paronychia
A
- staph/strep/ candida
- disruption to nail plate
- throbbing, red, swollen, painful, draining
- swab for MRSA if suspicious
13
Q
What is this infectious condition
A
Cellulitis
14
Q
How does lymphangitis present
A
streaking
15
Q
Characteristics of cellulitis
A
- GABHS, Staph Aureus
- not well demarcated
- access into dermis and subQ
16
Q
What is this infectious condition
A
Erysipelas
17
Q
Characteristics of erysipelas
A
- form of quickly progressing cellulitis
- raised, sharply demarcated
- superficial (dermis)
18
Q
Cellulitis diagnosis
A
- assess nidus of infection and MRSA history
- usually red swollen and hot
- do wound culture
- mark it
- watch for necrotizing fasciitis
19
Q
What is this infectious condition
A
Meningococcemia
20
Q
Characteristics of meningococcemia
A
- super sick
- non-blanching, petechia, purpuric, gunmetal gray
- do CSF culture!
- ICU care
21
Q
Viral infections of skin
A
- varicella
- shingles (herpes zoster)
- molluscum contagiosum
- verruca vulgaris (warts)
22
Q
What is this infectious condition
A
varicella
23
Q
Varicella characteristics
A
- pruritic central to peripheral rash
- 1-2 day prodrome
- very contagious
- no longer contagious once scabbed over
24
Q
What is this condition
A
Zerpes zoster (shingles)
25
Characteristics of herpes zoster
- reactivation of varicella which was latent on cranial nerve/dorsal root ganglia
- precipitated by immunosuppression or stress
- prodrome phase
- dermatomal pattern (UNILATERAL)
26
What is this condition
zoster opthalmacus
27
What is this condition
molluscum contagiosum
28
Characteristics of molluscum contagiosum
- viral
- skin to skin contact
- **pearly papules with umbilication**
- self limited
- no sexual contact
- itchy, intertriginous, resultin gin scarring/pitting/depigmentation
29
what is this condition
verrucae vulgaris
30
Characteristics of verrucae vulgaris
- rough scaly stalk like growth
- black inclusion root underneath
- cauliflower like lesion
- consider biopsy if red flags present
- can inject candida to induce immune response
31
Types of fungal infections
- Yeast
- Dermatophytes (tinia)
32
What is this condition
cutaneous candidiasis - intertrigo
33
characteristics of cutaneous candidiasis
- intertriginous satellite lesions
- yeast grows in warm dark moist areas
- can look like irritant contact dermatitis (more confluent)
- itching, burning
- treat with topical antifungals or oral fluconazole if excessive
34
What is this condition
tinea
35
7 types of tinia
- capitis
- barbae
- corporis (ringworm)
- cruris (jock itch)
- manuum
- pedis (athlete's foot)
- unguium (onychomycosis)
36
What is this condition
Tinea capitis
37
What is this condition
Kerion (type of tinea capitis)
- painful boggy mass
- immune response to tinea capitis
38
What is this condition
tinea pedis
39
What is this condition
tinea corporis
40
what is this condition
tinea manuum
41
What is this condition
onychomycosis
42
characteristics of onychomycosis
- tinea/yeast/mold
- hyperkeratotic, yellow, separated from nail bed
- thickened opaque, yellow, brown
43
What to look for if treating with oral terbinafine
hepatotoxicity and liver function at initiation
44
What is this condition
pityriasis versicolor/tinea versicolor
45
characteristics of tinea versicolor
- recurrent, summer months, state fair rash
- KOH shows spaghetti and meatballs
46
What is this condition
hydradenitis suppurativa
47
characteristics of hydradenitis suppurativa
- recurring around hair follicles, involves sweat glands
- chronic, disfiguring, rope like scars
- painful fluctuant nodules of intertriginous areas
- no shaving or I&D, perpetuates scarring and infection
48
What is this condition
pilonidal disease
49
characteristics of pilonidal disease
- inverted hair follicle into natal cleft
- chronic/recurring
- can be surgical consult
50
What is the term for nail fungus
onychomycosis
51
what is the best test to order for a patient with onychomycosis
KOH prep
