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Flashcards in Infectious Disorders Deck (15):
1

What is the superficial bacterial skin infection that is often caused by S. aureus or S. Pyogenes?

Impetigo

2

A patient presents with an erythematous pustules on the face. The patient reports that the some pustules have ruptured and a dry, crusted, honey-colored serum was discharged. Laboratory results concluded that the superficial skin infection was due to S. aureus. What is the most likely diagnosis?

Impetigo

3

A deep infection that presents as red, tender, swollen rash with a fever. The infection is usually caused by S. aureus or S. pyogenes. What is this infection?

Cellulitis

4

What are the risk factors for the development of cellulitis?

Surgery
Trauma
Insect bite

5

What can cellulitis progress into?

Necrotizing fasciitis

6

Necrosis of subcutaneous tissue that is due to an anaerobic flesh-eating bacteria and is preempted by cellulitis?

Necrotizing fasciitis

7

What leads to crepitus seen with necrotizing fasciitis?

Production of CO2

8

Patient present with sloughing of the skin with erythematous rash and a fever caused by a S. aureus infection. The skin separation occurs at the level of the stratum granulosum. What is the most likely diagnosis?

Staphylococcal scalded skin syndrome

9

What is the mechanism of skin loss seen with staphylococcal scalded skin syndrome?

The exfoliative A and B toxins of S. aureus results in epidermolysis of the stratum granulosum.

10

How is staphylococcal scalded skin syndrome distinguished from toxic epidermal necrolysis?

Level of skin separation. With TEN the separation occurs at the dermal-epidermal junction and with staphylococcal scalded skin syndrome the separation occurs at the stratum granulosum

11

What is the typical presentation of a verruca (wart)?

Fleshed-colored papule with a rough surface

12

What is the cause of a verruca (wart)?

HPV infection of the keratinocytes

13

What is the characteristic change that occurs to the keratinocytes with an HPV infection that causes a verruca (wart)?

Koilocytic change

14

What are the 2 most common locations for verruca to occur?

Hands and feet

15

A firm, pink umbilicated papule that is caused by the poxvirus…

Molluscum contagiosum