L3 - Cellulitis And Abscesses

Question 1

What is cellulitis?

Answer 1

An infection of the deeper layers of the dermis
Can be purulent or non-purulent
Can progress into deeper tissues to the point where it may even affect bone

Question 2

What pathogens can cause cellulitis?

Answer 2

Gram positive cocci

Question 3

Which pathogens tend to cause non-purulent cellulitis?

Answer 3

Beta hemolytic streptococci especially group A streptococci (e.g. S pyogenes)

Question 4

What pathogen tends to cause purulent cellulitis (abscesses)

Answer 4

Staph aureus including MRSA

Question 5

What is an abscess?

Answer 5

Features of cellulitis + a focal collection of pus within the subcutaneous tissue

Question 6

How does erythema manifest in dark skinned individuals?

Answer 6

The erythema may manifest as darkened or even black discoloration

Question 7

What are the key clinical considerations in sepsis?

Answer 7

Organ dysfunction and dysregulation

Question 8

What are some DDx for cellulitis?

Answer 8

DVT, necrotizing fasciitis, erysipelas, venous stasis, contact dermatitis, underlying osteomyelitis