Soft tissue skin infections

Question 1

Skin and soft tissue infections (SSTI)

Answer 1

bacterial infections of the skin, muscles, and connective tissue such as ligaments and tendons

Question 2

Abscesses

Answer 2

a collection of pus that has built up within the tissue of the body

Question 3

Cellulitis

Answer 3

affects the middle layer of the skin (dermis) and the tissues below. Sometimes, muscle below the skin can be affected.

Question 4

Folliculitis

Answer 4

inflammation of one or more hair follicles. It can occur anywhere on the skin

Question 5

Common pathogen associated with these infections?

Answer 5

Staphylococcus aureus

Question 6

Sources of endogenous wounds and abscesses

Answer 6

1) dental infections, osteomyelitis, cellulitis, other internal infections

2) nosocomial infections acquired after invasive procedures, surgery

3) hematogenous spread

4) ruptured viscera (e.g large intestine)

Question 7

Examples of pathogens found in wounds and abscesses

Answer 7

Pasturella maltocida - animal bites

S. anginousus - neck and head abscesses

S. aureus

S. pyogenes

P. aureginosa

most infections are polymicrobial

Question 8

Lymphocutaneous- subcutaneous nodules that progress along dermal and lymphatic vessels

Answer 8

Sporothrix

Nocardia

Mycobacterium marinum

Leishmania

NTM- M. chelonae and M. fourtuitum

Question 9

Superficial cellulitis

Answer 9

S. pyogenes
S. aureus
Erysipelothrix spp.
Francisella tularensis-tularemia

Question 10

Mycetoma-destructive subcutaneous infection

Answer 10

Actinomycosis

Streptomyces

Molds