Small intestinal bacterial overgrowth in children with intestinal failure on home parenteral nutrition

Area of Science:

• Pediatric Gastroenterology
• Intestinal Failure Research
• Microbiome Studies

Background:

• Children with intestinal failure (IF) exhibit altered gut anatomy/function, predisposing them to small intestinal bacterial overgrowth (SIBO).
• Home parenteral nutrition (PN) is a common supportive therapy for IF, but may influence SIBO risk.
• Accurate diagnosis of SIBO in this vulnerable population presents significant challenges.

Purpose of the Study:

• To describe clinical features of clinically suspected SIBO in children with IF on home PN.
• To review diagnostic testing challenges for SIBO in pediatric IF.
• To explore potential novel diagnostic surrogate markers for SIBO in this cohort.

Main Methods:

• A single-center, retrospective chart review of all clinically suspected SIBO episodes over 33 months.
• Data collection included clinical symptoms and diagnostic tests performed.
• Patient characteristics, including IF etiology (short bowel syndrome vs. non-SBS IF), were recorded.

Main Results:

• 71% of children on home PN experienced at least one episode of clinically suspected SIBO.
• Short bowel syndrome (SBS) and non-SBS IF each accounted for 50% of cases.
• Diarrhea was the most frequent symptom, particularly in SBS patients, with non-SBS IF patients reporting more symptoms per episode.

Conclusions:

• Children with IF on home PN represent a high-risk group for SIBO.
• SIBO clinical presentations are variable and can overlap with underlying IF symptoms.
• Clinical suspicion is crucial due to diagnostic test limitations; further research into surrogate markers like urinary metabolite screens is warranted.