Severe SSTI in people who inject drugs

Duration

Depends on severity and need for surgical source control.

Uncomplicated infection without bacteraemia or undrained abscess: 7 days.

Treatment Overview

Important: Therapy

Treat patients presenting with septic shock following the guidance for necrotising fasciitis.

 

Notes:

SSTIs in injecting drug users can be caused by a large variety of pathogens, including S. aureus and Group A Streptococcus/S. pyogenes, which are common in all types of SSTI, but also by anaerobes, environmental organisms and gram negative enterobacteriaceae, especially if the injection site is in the groin area.

  • Pillar 1: Cover for gram positive organisms (mainly beta-haemolytic streptococci and aureus)
  • Pillar 2: Cover for gram negative organisms
  • Pillar 3: Cover for anaerobic organisms

Patients with acute or chronic impairment of renal function and an eGFR <20mL/min and those with decompensated alcoholic liver disease are at increased risk of adverse events with gentamicin. IV temocillin (adjusted to renal function) is a beta-lactam antimicrobial with a comparable breadth of gram negative cover which can replace gentamicin in these patient populations, provided they do not have a history of penicillin allergy.

Do not administer gentamicin to patients with Myasthenia gravis as it risks precipitating myasthenic gravis.

Important: Notes

Rarely, PWIDs acquire wound botulism. See sampling section for sampling advice in suspected wound botulism.

If necrotising fasciitis is suspected, an urgent surgical review should be requested, as debridement is life-saving.

Advice from Microbiology or Infectious Diseases on antimicrobial therapy should be sought as soon as possible.