Decolonization Management for Recurrent MRSA Infections

Introduction to Decolonization

• The Infectious Diseases Society of America recommends decolonization for patients with recurrent MRSA skin and soft tissue infections only after optimizing wound care and hygiene measures have failed, using a combination of intranasal mupirocin twice daily for 5-10 days plus topical antiseptic body decolonization with chlorhexidine for 5-14 days or dilute bleach baths 1, 2

When to Consider Decolonization

• Decolonization should only be considered in specific circumstances, such as after failure of hygiene measures or ongoing household transmission, as recommended by the Infectious Diseases Society of America 1, 2
• The American College of Physicians suggests that decolonization is not a first-line intervention and should only be considered when a patient develops recurrent SSTI despite optimizing wound care and personal hygiene 1, 2

Stepwise Approach to Management

Step 1: Optimize Hygiene Measures First (Before Decolonization)

• The Centers for Disease Control and Prevention recommends keeping all draining wounds covered with clean, dry bandages, maintaining hand hygiene with soap and water or alcohol-based gel, and avoiding sharing personal items that contact infected skin 1, 5
• The World Health Organization suggests focusing cleaning on high-touch surfaces that contact bare skin and using commercially available cleaners according to label instructions 1, 2

Step 2: Decolonization Regimens (If Step 1 Fails)

• The Infectious Diseases Society of America recommends intranasal mupirocin 2% ointment twice daily for 5-10 days plus chlorhexidine body wash daily for 5-14 days or dilute bleach baths as a decolonization regimen 1, 2, 4
• The American College of Physicians suggests that decolonization strategies must be offered in conjunction with ongoing reinforcement of hygiene measures, not as a replacement 1, 2

Role of Cultures

• The Infectious Diseases Society of America recommends that screening cultures are not routinely recommended in most situations, except before decolonization or after decolonization in the absence of active infection 2, 4

Important Caveats and Pitfalls

Limited Evidence Base

• The evidence supporting decolonization for recurrent community-acquired MRSA is weak, with most studies showing benefit conducted in healthcare settings or with MSSA, not community-acquired MRSA, as noted by the Infectious Diseases Society of America 3, 4

When Decolonization May Not Work

• The American College of Physicians suggests that decolonization may not be effective if local factors are present, such as foreign material or hidradenitis suppurativa, or if neutrophil dysfunction exists 3, 6

Adjunctive Antibiotic Therapy

• The Infectious Diseases Society of America recommends that for recurrent abscesses specifically, treatment with a 5-10 day course of an antibiotic active against the pathogen should be considered after obtaining cultures 7
• The American College of Physicians suggests that the benefits of adjunctive antimicrobial therapy in preventing recurrences remain unknown 6