Emerg Infect DiseidEmerging Infectious Diseases1080-60401080-6059Centers for Disease Control100816882627688Research ArticleInfectious diarrhea in tourists staying in a resort hotel.HardieR. M.R.Hardie@cdsc.nthames.nhs.ukWallP. G.GottP.BardhanM.BartlettL. R.PHLS, Communicable Disease Surveillance Centre, London, United Kingdom.Jan-Feb199951168171

An outbreak of infectious diarrhea with 70 laboratory-confirmed cases (58 with Giardia lamblia) and 107 probable cases occurred in U.K. tourists who stayed in a hotel in Greece. After a cluster of six cases in persons who had stayed at the hotel was reported, the Communicable Disease Surveillance Centre began active case ascertainment. This outbreak illustrates the value of an approach to surveillance that integrates routine surveillance data with active case ascertainment.