Gut microbial translocation in critically ill children and effects of supplementation with pre- and pro biotics

Area of Science:

• Pediatric critical care medicine
• Gastroenterology
• Microbiology

Background:

• Bacterial translocation is hypothesized to cause sepsis by bacteria crossing the intestinal barrier.
• Critically ill children, especially neonates, face heightened risk due to factors like intestinal immaturity and critical illness.
• While experimental data support the theory, human studies linking translocation to bloodstream infections in children are limited.

Purpose of the Study:

• To review the role of gut microflora in bacterial translocation and sepsis.
• To examine bacterial mechanisms for entering systemic circulation.
• To discuss how critical illness impacts the gut environment and promotes translocation.

Main Methods:

• Literature review focusing on bacterial translocation mechanisms and critical illness.
• Analysis of pre- and probiotic interventions for gut health in critically ill children.

Main Results:

• Critical illness alters gut microflora, favoring pathogens that promote bacterial translocation.
• Experimental studies support bacterial translocation as a sepsis cause, but human evidence is scarce.
• Pre- and probiotics may restore microbial balance, improving intestinal permeability and reducing translocation.

Conclusions:

• Bacterial translocation remains a significant, though not fully confirmed, pathway to sepsis in critically ill children.
• Understanding gut microflora dynamics is crucial for managing translocation.
• Therapeutic strategies involving prebiotics and probiotics show promise for mitigating bacterial translocation.