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Dermatology > MDT Part 1 > Flashcards

MDT Part 1 Flashcards

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Dermatology Board Prep flashcards
1
Q

What is folliculitis?

A

Inflammation of a hair follicle that can occur anywhere on the body where hair is found

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2
Q

What is the most common bacterial cause of folliculitis?

A
  • Most frequently due to S. Aureus

- Streptococcus species

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3
Q

What is the most common fungal cause of folliculitis?

A
  • Dermatophytic (tinea capitis, corporis, pedis)
  • Pityrosporum (affecting teenagers and men) on upper chest and back
  • Candida albicans
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4
Q

What is the most common viral cause of folliculitis?

A
  • HSV (Herpes simplex virus)

- Molluscum contagiosum

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5
Q

What is the most common cause of parasitic folliculitis?

A
  • Mites

- Schistosomes (swimmer’s itch)

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6
Q

What is the most common cause of non-infectious folliculitis?

A
  • Pseudo-folliculitis barbae (PFB)

- Mechanical folliculitis (skinny jeans)

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7
Q

What are some folliculitis risk factors?

A
  • Hair removal
  • Occlusive dressing/clothing
  • Diabetes Mellitus
  • Immunosuppresion
  • Use of hot tubs/sauna
  • Chronic antibiotic use
  • Tattoo
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8
Q

What is the presentation of folliculitis?

A
  • Abrupt onset of follicular erythematous papules or pustules, with pruritis and pain in hairy areas
  • Rash on hair-bearing skin
    • Hallmark: Hair emanating from center of pustule**
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9
Q

General treatment and prevention of folliculitis?

A
  • Antiseptic and supportive care (usually enough)
  • Good hygiene
  • Wash hands, towels, clothes, linens frequently
  • Good hair removal practice
  • Use witch hazel, alcohol, or tend skin
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10
Q

Therapeutic care of Staph folliculitis?

A
  • Mupirocin ointment
  • Cephalexin
  • Dicloxacillin
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11
Q

Therapeutic care of MRSA folliculitis?

A
  • Bactrim
  • Clindamycin
  • Doxy
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12
Q

Therapeutic care of Pseudomonas folliculitis?

A
  • Cipro
  • High potency topical corticosteroids
  • Antihistamines
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13
Q

Therapeutic care of fungal folliculitis?

A
  • Topical antifungals

- “Zole” medications, ketoconazole, fluconazole

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14
Q

Therapeutic care of parasitic folliculitis?

A

5% permethrin

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15
Q

Therapeutic care of herpetic folliculitis?

A
  • Valacyclovir

- Acyclovir

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16
Q

What is pseudofolliculitis barbae?

A
  • Condition caused by ingrown hairs
  • Affects people with curly hair
  • Sharp, shaved, tapered hair re-enters the skin as it grows from below the skin surface
17
Q

Presentation of PFB?

A
  • Red papules or pustules can be pruritic and/or painful
  • Occurs where hair is shaved
  • Scarring and hyperpigmentation may result
18
Q

What is the Treatment approach 1 with mild to moderate PFB?

A
  • APplication of medicated creams
  • Shaving with gentle equipment (PFB razor with foil guard)
  • Either topical retinoid or eflornithine
  • Temporary no shave up to 60 days
19
Q

What is treatment approach 2 with moderate to severe PFB?

A
  • Laser hair reduction with grooming modifications

- Series of at least 3 treatments with 30-45 days between treatments

20
Q

What is impetigo?

A

Contagious, superficial, intra-epidermal infection occurring prominently on exposed areas of the face and extremities

21
Q

What is primary impetigo?

A
  • Pyoderma

- Invasion of previously normal skin

22
Q

What is secondary impetigo?

A
  • Impetiginization
  • Invasion at sites of minor trauma
  • Can be considered to be S. aureus impetigo of hair follicles
23
Q

General information of impetigo?

A
  • Infected patients usually have multiple lesions
  • Staph aureus alone or combined with group A beta-hemolytic strep
  • Systemic symptoms infrequent
24
Q

What is the most common form of impetigo?

A

Nonbollous impetigo

25
Q

What are risk factors of impetigo?

A
  • Warm, humid environment
  • Tropical/subtropical climate
  • Summer/fall season
  • Poor hygiene
  • Familial spread
  • Children in daycare
26
Q

Treatment of impetigo?

A
  • Avoidance of infection
  • Handwashing
  • Prevent with mupirocin ointment TID
  • Remove crust, clean 2-3x daily with gentle washing and antibacterial soap

Dermatology (4 decks)

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