What is Travellerâs Diarrhoea? Travellerâs diarrhoea (TD) is a condition characterised by a marked increase in the frequency of unformed bowel movements and is commonly accompanied by abdominal cramps, urgency, nausea, bloating, vomiting and fever. Episodes of TD usually begin abruptly, and occur during travel or soon after returning home. The onset of TD is usually within the first week of travel, but can occur at any time during the visit and even after returning home. TD typically results in four to five (sometimes more) loose or watery stools per day. The average duration of diarrhoea is three or four days but about 10% of the cases persist longer than a week, approximately 15% of cases experience vomiting, and up to 10% have diarrhoea accompanied by fever or bloody stools, or both. Who gets TD? TD affects 11 million people worldwide annually and attacks up to 50% of holiday makers23. Current treatments only provide relief from the symptoms when they occur and cannot prevent contracting the illness. TD occurs in up to a half of European travellers who spend two or more weeks in developing parts of the world.