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Epidemiology, Biostatistics and Prevention Institute

Extended-Spectrum Cephalosporin and/or Colistin-Resistant Enterobacteriaceae in Swiss Travellers to Tanzania and Laos, in the Local Population, in Broiler Chicken and in Chicken Meat

International travel is a known risk factor for becoming colonized with antibiotic-resistant bacteria in the gastrointestinal tract. While certain risk factors for becoming colonized are known (travelling destination, suffering from travellers’ diarrhoea and taking antibiotics while travelling), the exact mechanism of how people become colonized remains unclear. To learn more about the spread of antibiotic-resistant bacteria at the human-to-human as well as the animal-to-human interface we carry out this study comparing antibiotic-resistant bacteria found in the gut of returning travellers, of the local population and of local chicken as well as in chicken meat.

Weiterführende Informationen

Looking for participants

We are actively looking for participants for our study. If you plan to travel abroad for a maximum of four weeks and will spend at least five days in Laos or Zanzibar at the end of the journey, you can participate. Please contact study coordinator Esther Künzli at if you are interested to learn more.

Team Members

Esther Künzli (Project Leader)
Christoph Fuchs
Christoph Hatz


Swiss National Science Foundation - SNF