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Cumulative > Dermatologic Infections > Flashcards

Dermatologic Infections Flashcards

1
Q

What two organisms are responsible for most bacterial skin infections

A

-GABHS (group A beta hemolytic strep)
-staph aureus

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2
Q

Characteristics of impetigo

A
  • contagious, spreading, asymptomatic
  • honey colored crusts
  • occlusive vesicles
  • consider wound culture
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3
Q

What is this infectious condition

A

Impetigo

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4
Q

Treatment for impetigo

A
  • self-limiting
  • topicals, washing, dilute bleach bath
  • infection control
  • return to school when crusts/bullae are gone
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5
Q

What is this infectious condition

A

Folliculitis

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6
Q

Characteristics of folliculitis

A
  • bacteria, virus, fungus, parasite
  • spa folliculitis: pseudomonas aeruginosa
  • recent shave/hot tub
  • erythematous plaques around follicles
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7
Q

Folliculitis treatment

A
  • self-limited
  • soap, benzoyl peroxide
  • proper shaving techniques
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8
Q

What is this infectious condition

A

pseudofolliculitis barbae

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9
Q

What is this infectious condition

A

abscess

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10
Q

characteristics of an abscess

A
  • painful, purulent, firm base with fluctuant center
  • warm, tender
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11
Q

What is this infectious condition

A

paronychia

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12
Q

characteristics of paronychia

A
  • staph/strep/ candida
  • disruption to nail plate
  • throbbing, red, swollen, painful, draining
  • swab for MRSA if suspicious
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13
Q

What is this infectious condition

A

Cellulitis

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14
Q

How does lymphangitis present

A

streaking

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15
Q

Characteristics of cellulitis

A
  • GABHS, Staph Aureus
  • not well demarcated
  • access into dermis and subQ
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16
Q

What is this infectious condition

A

Erysipelas

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17
Q

Characteristics of erysipelas

A
  • form of quickly progressing cellulitis
  • raised, sharply demarcated
  • superficial (dermis)
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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
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19
Q

What is this infectious condition

A

Meningococcemia

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20
Q

Characteristics of meningococcemia

A
  • super sick
  • non-blanching, petechia, purpuric, gunmetal gray
  • do CSF culture!
  • ICU care
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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
Q

Characteristics of herpes zoster

A
  • reactivation of varicella which was latent on cranial nerve/dorsal root ganglia
  • precipitated by immunosuppression or stress
  • prodrome phase
  • dermatomal pattern (UNILATERAL)
26
Q

What is this condition

A

zoster opthalmacus

27
Q

What is this condition

A

molluscum contagiosum

28
Q

Characteristics of molluscum contagiosum

A
  • viral
  • skin to skin contact
  • pearly papules with umbilication
  • self limited
  • no sexual contact
  • itchy, intertriginous, resultin gin scarring/pitting/depigmentation
29
Q

what is this condition

A

verrucae vulgaris

30
Q

Characteristics of verrucae vulgaris

A
  • 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
Q

Types of fungal infections

A
  • Yeast
  • Dermatophytes (tinia)
32
Q

What is this condition

A

cutaneous candidiasis - intertrigo

33
Q

characteristics of cutaneous candidiasis

A
  • 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
Q

What is this condition

A

tinea

35
Q

7 types of tinia

A
  • capitis
  • barbae
  • corporis (ringworm)
  • cruris (jock itch)
  • manuum
  • pedis (athlete’s foot)
  • unguium (onychomycosis)
36
Q

What is this condition

A

Tinea capitis

37
Q

What is this condition

A

Kerion (type of tinea capitis)
- painful boggy mass
- immune response to tinea capitis

38
Q

What is this condition

A

tinea pedis

39
Q

What is this condition

A

tinea corporis

40
Q

what is this condition

A

tinea manuum

41
Q

What is this condition

A

onychomycosis

42
Q

characteristics of onychomycosis

A
  • tinea/yeast/mold
  • hyperkeratotic, yellow, separated from nail bed
  • thickened opaque, yellow, brown
43
Q

What to look for if treating with oral terbinafine

A

hepatotoxicity and liver function at initiation

44
Q

What is this condition

A

pityriasis versicolor/tinea versicolor

45
Q

characteristics of tinea versicolor

A
  • recurrent, summer months, state fair rash
  • KOH shows spaghetti and meatballs
46
Q

What is this condition

A

hydradenitis suppurativa

47
Q

characteristics of hydradenitis suppurativa

A
  • 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
Q

What is this condition

A

pilonidal disease

49
Q

characteristics of pilonidal disease

A
  • inverted hair follicle into natal cleft
  • chronic/recurring
  • can be surgical consult
50
Q

What is the term for nail fungus

A

onychomycosis

51
Q

what is the best test to order for a patient with onychomycosis

A

KOH prep

Cumulative (162 decks)

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