Altering Routine Intensive Care Unit Practices to Support Commensalism

Area of Science:

• Microbiology
• Immunology
• Gastroenterology

Background:

• The gastrointestinal (GI) tract harbors trillions of microorganisms, collectively known as the microbiome.
• The microbiome is vital for numerous bodily functions, including immunity, digestion, absorption, and drug metabolism.
• Alterations in the microbiome are observed in critical illness, leading to adverse health outcomes.

Purpose of the Study:

• To investigate the impact of critical illness and common medical interventions on the GI microbiome.
• To understand the relationship between microbiome changes and patient health in critical care settings.
• To explore the potential of targeting microbiome-immune interactions for therapeutic interventions.

Main Methods:

• Observational studies characterizing microbiome composition and diversity in critically ill patients.
• Analysis of the effects of antibiotics and nutritional support (enteral and parenteral nutrition) on the GI microbiome.
• Investigating the crosstalk between the microbiome and the host immune system.

Main Results:

• Critical illness significantly alters the composition and diversity of the GI microbiome.
• Common medical treatments, including antibiotics and prolonged nutrition support, induce specific changes in the microbiome.
• Aberrant microbiome functions are linked to untoward effects in critically ill patients.

Conclusions:

• The GI microbiome is highly sensitive to critical illness and medical interventions.
• Understanding microbiome alterations is crucial for managing critically ill patients.
• Targeting microbiome-immune crosstalk presents a promising avenue for novel drug and nutrition therapies.