• Nathan J Klingensmith and Craig M Coopersmith.
• Department of Surgery, Emory Critical Care Center, Emory University School of Medicine, Atlanta, GA, USA.
• Crit Care Clin. 2016 Apr 1; 32 (2): 203-12.

AbstractAll elements of the gut - the epithelium, the immune system, and the microbiome - are impacted by critical illness and can, in turn, propagate a pathologic host response leading to multiple organ dysfunction syndrome. Preclinical studies have demonstrated that this can occur by release of toxic gut-derived substances into the mesenteric lymph where they can cause distant damage. Further, intestinal integrity is compromised in critical illness with increases in apoptosis and permeability. There is also increasing recognition that microbes alter their behavior and can become virulent based upon host environmental cues. Gut failure is common in critically ill patients; however, therapeutics targeting the gut have proven to be challenging to implement at the bedside. Numerous strategies to manipulate the microbiome have recently been used with varying success in the ICU. Copyright © 2016 Elsevier Inc. All rights reserved.

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