DFI (Diabetic Foot Infections)


Signs and symptoms

Diabetic foot infections typically take one of the following forms:

  • Cellulitis
  • Deep-skin and soft-tissue infections
  • Acute osteomyelitis
  • Chronic osteomyelitis


  • Tender, erythematous, nonraised skin lesions are present, sometimes with lymphangitis
  • Lymphangitis suggests group A streptococcal infection
  • Bullae are typical of Staphylococcus aureus infection, but occasionally occur with group A streptococci

· No ulcer or wound exudate is present

Deep-skin and soft-tissue infections

  • The patient may be acutely ill, with painful induration of the soft tissues in the extremity
  • Wound discharge is usually not present
  • In mixed infections that may involve anaerobes, crepitation may be noted over the afflicted area
  • Extreme pain and tenderness may indicate compartment syndrome or clostridial infection (ie, gas gangrene)
  • The tissues are not tense, and bullae may be present
  • Discharge, if present, is often foul