Common Infections of the Skin Flashcards Preview

Week 44: Rash > Common Infections of the Skin > Flashcards

Flashcards in Common Infections of the Skin Deck (25)
Loading flashcards...
1

HSV 1 and 2

Grouped vesicles on an erythematous base
Persists in sensory ganglia leading to recurrent infections
Can see erosions and crusting sometimes

2

Varicella

Morphology like "a dewdrop on a rose petal"
Initial lesions papules which become vesicles
Vesicles then crust over
May heal with scarring
Crops of lesions in all stages

3

Herpes zoster

Prodrome of neuritic pain
Acute vesicles then crusted papules
Distribution is unilateral and dermatomal
Grouped vesicles on an erythematous base

4

Non bullous impetigo

Scaling honey crusted non bullous impetigo
Superficial infection of epidermis caused by group A strep or s aureus

5

Bullous impetigo

Vesicles and bullae
Clear or slightly yellow fluid
Shallow erosions if bullae break
Caused by S aureus

6

Bedbugs

Cause erythematous papules, vesicles, nodules
Will often bite on body and head and neck area
Itchy
Groups of 3 or 4

7

Pityrosporum folliculitis

Monomorphous papules without comedones
Sweaty people
Caused by normal healthy yeast that has gone into the hair follicle
Not very inflamed

8

Pseudomonas folliculitis

History of hot tub exposure
Inflammatory follicular-based papules and pustules
Involves exposed areas
Self limited

9

Tinea corporis

Annular scaling edge
Well demarcated plaques
Central clearing
Single or multiple lesions

10

Pityriasis versicolor

Not a dermatophyte infection
Well marginated round scaling brown or pale minimally elevated papules
Yeast
Common in young adults

11

Secondary syphilis

2-6 months after primary infection
First eruption is macular then can be papulosquamous, pustular or acneiform
Look for involvement of palms and soles

12

Verruca vulgaris

Common warts
Firm, hyperkeratotic papules with clefted surface and vegetations
Red or brown dots from thrombosed capillary loops
Transmitted by skin to skin contact

13

Molluscum contagiosum

Skin coloured umbilicated papules
Mollusca undergoing spontaneous regression may have an erythematous halo/ezcema

14

Scabies

Widespread pruritic eczematous eruption
Spares head and neck usually
Can take 6 weeks from exposure
Burrows: serpiginous track with spot at end
Nodules: red/brown nodules in axillary area and groin, can persist after infection is clear

15

Norwegian scabies

Heavy infestation of scabies mite in immunocompromised hosts
Highly contagious and requires repeated treatments

16

Pediculosis corporis

Body louse
Eczematous eruption
No primary lesions
Secondary infection common
Look in seams of clothing for louse and nits
Very itchy - a lot of crusting and superficial erosions

17

Pediculosis Capitis

Head lice
Itchy
Bite reactions include eczema, excoriation, lichenification

18

Tinea cruris

Well marginated scaling red plaques with central clearing
Papules and pustules may be present at margins
Occurs in inguinal region and on thighs

19

Candidal intertrigo

Erythematous plaques with satellite papules and pustules
Found in moist environment
From yeast

20

Erythasma

Sharply marginated patch
Redilection for folds

21

Inverse psoriasis

Well marginated erythematous plaques
Check for psoriasis elsewhere (scalp, nails, etc)
Tends not to scale like psoriasis elsewhere

22

Things that Staph aureus can cause

Impetigo
Ecthyma
Cellulitis
Folliculitis
Furuncles (boils)
Carbuncles
Abscesses

23

Things HPV can cause

Flat warts
Plantar warts
Verruca vulgaris
Periungual warts
Condylomata

24

Tinea unguium

Thick yellow dystrophic toenails or fingernails
Toes more often involved
Genetic predisposition
Often associated with tinea pedis

25

Tinea pedis

Athlete's foot
Interdigital (scaling, maceration, fissures) and moccasin (well marginated, fine scale, hyperkeratosis) types
Inflammatory or bullous types