Wound infection

Keywords: Dog bite

Frequent Pathogens

Appropriate Tests


Minor wound infections may just require local drainage (eg, removal of surgical suture) and do not require microbiological testing.

Wound swab or MCS pus (pus microscopy and culture) for moderate or severe infection, especially when there is spreading cellulitis or symptoms and signs of systemic infection.

Aspiration of pus is preferable to a swab of pus or wound.

If aspiration or swab of pus, or wound swab, is not possible, injection of 0.5-1.0 mL of saline followed by aspiration may provide a suitable specimen (eg, from areas of cellulitis).

Trauma, including surgery


  • Staphylococcus aureus
  • Streptococcus pyogenes
  • Bacteroides fragilis


With soil, faecal contamination

  • Clostridium perfringens


With water contamination

  • Aeromonas hydrophila
  • Vibrio spp
  • Chromobacterium violaceum
  • Shewanella species
  • Burkholderia sp        


With fish-handling

  • Erysipelothrix rhusiopathiae


With dog or cat bite

  • Pasteurella multocida
  • Capnocytophaga canimorsus (dogs)


With human bite

  • Eikenella corrodens


Go Back

Page last updated:

Copyright © 2021 RCPA. All rights reserved.