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Table 2 Classification scheme of skin and soft tissue infections (SSTIs) according to Sarani et al.[5]

From: Necrotizing fasciitis: literature review of contemporary strategies for diagnosing and management with three case reports: torso, abdominal wall, upper and lower limbs

Classification characteristic Most common disease (underline) Incidence (%)
Anatomic localization Fournier's gangrene of perineum and scrotum
Depth of infection Necrotizing adiposities
  fasciitis, myonecrosis
Microbial cause Type I: polymicrobial/synergistic/70-80% of cases
  Type II: monomicrobial (Staphylococcus, Streptococcus, Clostridia spp)/20% of cases
  Type III: marine related organisms
  Type IV: fungal
Severity of infection  
Uncomplicated infections Superficial: impetigo, ecthyma
  Deeper: erysipelas, cellulitis
  Hair follicle associated: folliculitis, furunculosis
  Abscess: carbuncle, other cutaneous abscesses
Complicated infections Secondary skin infections
  Acute wound infection (traumatic, bite related, postoperative)
  Chronic wound infections (diabetic wound infection, venous stasis ulcers, pressure sores)
  Perineal cellulitis with/without abscess
Necrotizing fasciitis  
Polymicrobial fasciitis (Type I) Fournier's gangrene, synergistic necrotizing cellulitis with fasciitis and myositis
  Streptococcal gangrene
Monomicrobial fasciitis (Type II) Marine-related organisms-Vibrio vulneriformis and other Vibrio spp
  Fungal spp
Crepitant myonecrosis Clostridial myonecrosis (traumatic gas gangrene and atraumatic gas gangrene-Clostridium perfrigens and other Clostridial spp)
  Synergistic necrotizing cellulitis with fasciitis and myositis
Non-crepitant myonecrosis Streptococcal gangrene with myonecrosis-Aeromonas hydrophila myonecrosis