19.5: Infectious Skin Disorders Flashcards Preview

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Flashcards in 19.5: Infectious Skin Disorders Deck (18):
1

What, generally, is impetigo? What bacteria usually cause it?

-Superficial bacteria skin infection
-S. aureus or S. pyogenes

2

What age group does impetigo usually affect?

Children

3

What are the clinical findings of impetigo?

Erythematous macules that progress to pustules with honey crustation

4

What is cellulitis? What bacteria usually cause it?

-Dermal infection that presents as a red, tender, swollen rash with a fever
-S. Aureus, or strep pyogenes

5

What is the major, general risk factor for the development of cellulitis?

Injury to the skin (e.g surgery, trauma, insect bite)

6

What is necrotizing fasciitis? What causes the crepitus with this?

-Necrosis of the SQ tissue with anaerobic bacteria
-CO2 production

7

What is the treatment for necrotizing fasciitis?

Surgical debridement

8

What are the toxins that cause staph scalded skin syndrome?

-Exfoliative A and B toxins

9

How does SSSS present?

Sloughing of the skin with an erythematous rash and fever

10

What layer of the skin is separated with SSSS?

Stratum granulosum

11

What is the key histological difference between SSSS and TEN?

Separation of the skin in TEN is at the dermal-epidermal junction, while SSSS is at the stratum granulosum

12

What are verruca?

Flesh-colored papule with rough surface (wart)

13

What causes verruca?

HPV infection of keratinocytes

14

What are the common locations on the body for warts (verruca)?

Hands and feet

15

What are the general clinical features of molluscum contagiosum?

Firm, pink umbilicated papules

16

What is the virus that causes molluscum contagiosum?

Poxvirus

17

Who gets molluscum?

-kids
-Sexually active adults
-immunocompromised

18

What is the key histological characteristic of molluscum infection?

Molluscum bodies