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Cellulitis (Deeper Skin Infection) - Coggle Diagram
Cellulitis (Deeper Skin Infection)
Epidemiology
Involves deeper dermis
Extends into subcutaneous fat
Can be misdiagnosed as a circulation problem
Orbital cellulitis = emergency
Usually caused by
Staph. aureus
Predisposing conditions
Any disruption to skin barrier
Acts as a portal for bacteria
Trauma
Abrasion
Insect bites
IV drug use
Skin conditions
Eczema
Impetigo
Tinea pedis
Chickenpox
Lower limb edema
Venous insufficiency
Lymphoedema
Heart failure
Ulcers
Diabetes
Causative organisms
Depends on risk factors
From routine skin integrity
Strep/Staph on skin
S. pyogenes
Staph. aureus
Diabetic foot
Gram - bacteria
Anaerobes
Same as groin area
Water exposure
Pseudomonas
Chronic wound/burn
Staphylococcus
Staph. aureus
Pseudomonas aeruginosa
Bite
Polymicrobial
Gram + cocci
Gram - bacilli
Anaerobes
Pathogenesis
Bacteria enters through skin break (can happen anywhere)
Lower limbs
Orbital/periorbital
Buccal (cheek)
Abdominal wall
Clinical Manifestations
Erythema
Edema
Pain
Warmth
+/- Systemic infection features
Malaise
Fever
Chills
Bacteraemia can occur
Diagnosis
Diagnosed clinically
Investigations
Blood cultures
Culture of exudate/skin break (if present)
Treatment/Prevention
Mild infection
Oral antibiotics
Severe infection/systemic symptoms
IV antibiotics
Make sure to demarcate erythema to note spreading in the future
Imobilize and elevate affected limb
Cool sterile dressings
If area weeping
Anelgesia
