TL;DR:
The composition of the gut microbiota had a significant change post-intravenous antibiotics treatment in cardiac surgery patients, and the richness and diversity of gut microbiota are increased in elderly patients.
(via Semantic Scholar)
Background and aimsSurgical site infection is a common complication after surgery. Periprocedural antibiotics are necessary to prescribe for preventing or treating infections. The present study aimed to explore the effect of intravenous antibiotics on gut microbiota and menaquinone biosynthesis in patients, especially in elderly patients undergoing cardiac surgery.