Dynamics and persistence of antimicrobial resistance genes and gut microbiome after travel

We read with interest an Article published in The Lancet Microbe by Colin J Worby and colleagues.1 They examined the changes in gut microbiome and antimicrobial resistant organisms in a cohort of US travellers before and after international travel. They found that the travellers frequently acquired Enterobacteriaceae and antimicrobial resistance genes (ARGs), aligning with our findings and those of other studies.2–5 Nevertheless, they were unable to determine the persistence of acquired antimicrobial resistant organisms, as they obtained only pre-travel and post-travel samples.