Management of G-Tube Site Infections

Initial Treatment Approach

The American Gastroenterological Association recommends starting with topical antimicrobial agents, and if the infection doesn't resolve within 5-7 days or shows systemic signs, add oral broad-spectrum antibiotics covering skin flora, such as cephalexin 500 mg four times daily or cefdinir 300 mg twice daily for 5-7 days 1, 2
Apply topical antimicrobial treatment immediately to the G-tube entry site and surrounding tissue as the first intervention, using antimicrobial ointments or sustained-release dressings containing silver, iodine, or polyhexamethylene biguanide 1, 2, 3
Swab the site for both bacterial and fungal cultures to guide targeted therapy if initial treatment fails 1, 2
Check that the external bolster has approximately 1 cm of play between the skin and bolster, as excessive tension increases infection rates 1, 3, 4
Clean the stoma site at least once daily with an antimicrobial cleanser 1, 2

Add oral broad-spectrum antibiotics if the infection doesn't resolve with topical treatment alone within 5-7 days or if systemic signs develop, such as fever or significant pain 1, 2
For minor infections with local signs only, cephalexin 500 mg four times daily for 5-7 days is the standard first-generation cephalosporin choice, providing excellent coverage for Staphylococcus aureus and Streptococcus species 5
Switch to intravenous broad-spectrum antibiotics coupled with local wound care if systemic signs develop, such as fever, hypotension, or altered mental status, or if the patient has diabetes, obesity, poor nutritional status, or is on immunosuppressive therapy 1, 4

Apply stoma adhesive powder or zinc oxide to prevent skin irritation from gastric drainage 1, 2, 4
Use foam dressings rather than gauze, as foam lifts drainage away from skin while gauze traps it 1, 2, 4
Ensure proper bolster tension with 1 cm of play to prevent tissue necrosis 1, 3, 4

Patients with diabetes, obesity, poor nutritional status, or those on chronic corticosteroids/immunosuppressive therapy have significantly higher infection rates and risk of progression to bacteremia, requiring closer monitoring and earlier escalation to systemic antibiotics 1, 3, 4
Obtain immediate surgical evaluation if signs of peritonitis develop despite appropriate antibiotics and wound care, or if persistent infection occurs despite 7-10 days of appropriate antimicrobial treatment 1, 2, 4