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EschCollection/Getty Images People in the Netherlands who travel abroad are unknowingly contributing to the rise of antibiotic resistance by picking up gut bacteria containing drug-resistance genes while overseas then returning home. The same is probably true of travellers elsewhere who visit countries with a high prevalence of resistant bacteria. John Penders at Maastricht University in the Netherlands and his colleagues took faecal swabs of 190 Dutch travellers before and after trips to countries in South-East Asia, South Asia, North Africa and eastern Africa, and analysed the bacteria in the samples. The team found that these travellers came back with gut microbiomes containing bacteria with many more and varied genes for antibiotic resistance than when they left.

United kingdomVastra gotalands lanNoord hollandCity ofJohan bengtsson palmeSouth east asiaBram van bunnikKrista charlesJohn penders at maastricht universityUniversity of gothenburgUniversity of edinburghScientist default imageSchiphol airportMaastricht universitySouth asiaNorth africa