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Polytrauma independent of therapeutic intervention alters the gastrointestinal microbiome.
American Journal of Surgery 2018 October
BACKGROUND: This study characterizes the gastrointestinal (GI) microbiome in a pre-clinical polytrauma hemorrhage model.
METHODS: Rats (n = 6) were anesthetized, hemorrhaged 20% of their blood volume, and subjected to a femur fracture and crush injuries to the small intestine, liver, and limb skeletal muscle without resuscitation. Fecal samples were collected pre-injury and 2 h post-injury. Purified DNA from the samples underwent 16s rRNA sequencing for microbial quantification. Bacterial diversity analysis and taxonomic classification were performed.
RESULTS: Following injury, the gut microbial composition was altered with a shift in beta diversity and significant differences in the relative abundance of taxa. The relative abundance of the families Lachnospiraceae and Mogibacteriaceae was increased at 2 h, while Barnesiellaceae and Bacteroidaceae were decreased. Alpha diversity was unchanged.
CONCLUSIONS: The GI microbiome is altered in rats subjected to a polytrauma hemorrhage model at 2 h post-injury in the absence of antibiotics or therapeutic interventions.
METHODS: Rats (n = 6) were anesthetized, hemorrhaged 20% of their blood volume, and subjected to a femur fracture and crush injuries to the small intestine, liver, and limb skeletal muscle without resuscitation. Fecal samples were collected pre-injury and 2 h post-injury. Purified DNA from the samples underwent 16s rRNA sequencing for microbial quantification. Bacterial diversity analysis and taxonomic classification were performed.
RESULTS: Following injury, the gut microbial composition was altered with a shift in beta diversity and significant differences in the relative abundance of taxa. The relative abundance of the families Lachnospiraceae and Mogibacteriaceae was increased at 2 h, while Barnesiellaceae and Bacteroidaceae were decreased. Alpha diversity was unchanged.
CONCLUSIONS: The GI microbiome is altered in rats subjected to a polytrauma hemorrhage model at 2 h post-injury in the absence of antibiotics or therapeutic interventions.
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