Well, antibiotic use is associated with diarrhoea and increased risk of C. difficile infections for this very reason. But the gut eventually gets recolonised by

Well, antibiotic use is associated with diarrhoea and increased risk of C. difficile infections for this very reason. But the gut eventually gets recolonised by commensal bacteria - either from food or from the appendix[0]. In the worst case, we could always resort to probiotics or fecal transplants. [0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3551545/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3551545/