Outbreak of Viral Gastroenteritis

we conducted environmental and laboratory investigations to elucidate the cause. Setting.\p=m-\Tourists traveling by bus through Alaska and the Yukon Territory of Canada. Participants.\p=m-\Staff of a restaurant at a business complex implicated as the outbreak source, convenience sample of persons on buses that had stopped there, and bus employees. Main Outcome Measures.\p=m-\Odds ratios (ORs) for illness associated with exposures. Water samples from the restaurant and stool specimens from tourists and restaurant staff were examined by nucleic acid amplification using reverse transcription polymerase chain reaction and sequencing of viral amplification products. Results.\p=m-\The itineraries of groups of tourists manifesting vomiting or diarrhea