Critical illness and the role of the microbiome

Area of Science:

• Microbiology
• Critical Care Medicine
• Human Health

Background:

• The human gut harbors a vast microbial community, comparable in number to human cells.
• Historically overlooked, the microbiome's role in health and disease is now a major research focus.
• Emerging evidence links the microbiome to critical illness, suggesting a shift towards a pathobiome.

Purpose of the Study:

• To review current data on the microbiome's transformation into a pathobiome during critical illness.
• To explore potential therapeutic strategies targeting the microbiome in intensive care settings.

Main Methods:

• Literature review of studies on the gut microbiome in critical illness.
• Analysis of data linking microbiome dysbiosis to disease pathogenesis.
• Evaluation of emerging therapeutic interventions.

Main Results:

• The gut microbiome composition drastically changes in critical illness, often becoming pathogenic (pathobiome).
• Microbiome alterations contribute to the severity and progression of critical illnesses.
• Targeting the pathobiome presents a promising avenue for novel therapies.

Conclusions:

• The gut microbiome plays a significant role in critical illness, shifting from a symbiotic to a pathogenic state.
• Interventions aimed at modulating the pathobiome could offer therapeutic benefits in the intensive care unit.
• Further research is needed to develop and validate microbiome-targeted therapies for critical care.