Treatment of Closed PEG Site Infection
For a closed PEG site infection, initiate treatment with topical antimicrobial agents applied to the affected area combined with daily antimicrobial cleansing, and if this fails to resolve the infection, add systemic broad-spectrum antibiotics tailored to culture results. 1
Initial Assessment and Diagnosis
Before initiating treatment, confirm true infection versus minor inflammation:
- Obtain swabs for both bacterial and fungal cultures from the site before starting antimicrobial therapy 2
- Look for definitive signs of infection: loss of skin integrity, erythema >5mm around the stoma, purulent and/or malodorous exudate, fever, and pain 1, 2
- Distinguish this from minor reddening (<5mm) which is often caused by movement and does not necessarily indicate infection 2, 3
Common pathogens include Pseudomonas aeruginosa, coliforms, Staphylococcus aureus (including MRSA), and Candida species, with polymicrobial infections occurring in approximately 47% of cases 4, 5
Treatment Algorithm
Step 1: Local Wound Care
- Clean the affected skin at least once daily using an antimicrobial cleanser 1, 2
- Apply topical antimicrobial agents (not topical antibiotics) to the entry site and surrounding tissue 1, 2
- Use antimicrobial dressings with sustained release properties containing silver, iodine, or polyhexamethylene biguanide in foam, hydrocolloid, or alginate forms 1
- Perform daily sterile dressing changes 3
Step 2: Systemic Antibiotics (if topical treatment fails)
- Add systemic broad-spectrum antibiotics if the infection does not resolve with topical treatment alone 1, 2
- Tailor antibiotic therapy based on culture results once available 2
- Most organisms remain susceptible to commonly used antimicrobial agents, though quinolone-resistant and multidrug-resistant organisms can occur 5
Step 3: Antifungal Coverage When Indicated
- Consider fungal infection in patients with diabetes, immunodeficiency, or visible candidiasis of the skin, oropharynx, or esophagus 1, 6
- Use topical antifungal agents for confirmed fungal infections 2
- Systemic antifungal therapy may be required for severe or necrotizing Candida infections 6
Critical Management Points
Ensure proper external bolster tension - verify at least 5mm of free movement to prevent pressure necrosis while maintaining adequate tension 2, 3. Overtightening paradoxically worsens infection risk by causing tissue ischemia 3.
Avoid topical antibiotics as they promote antimicrobial resistance; use antimicrobial dressings or ointments instead 1, 2
Be aware of dressing contraindications: check for allergies to product components, and remember that silver dressings cannot be worn during MRI procedures 1, 2
When Conservative Treatment Fails
If the infection cannot be resolved despite appropriate topical and systemic antimicrobial treatment, the tube should be removed 1. This is particularly important in cases of:
- Stoma tract disruption 1
- Peristomal infection persisting despite appropriate antimicrobial treatment 1
- Severe skin excoriation 1
- Necrotizing fungal infection 6
High-Risk Populations Requiring Vigilance
Patients at increased risk for PEG site infections include those with: