seasonal variation in etiology of travelers' diarrhea. finnish-moroccan study group.the etiology of travelers' diarrhea was studied in 579 adult finnish tourists participating in two packaged tours to morocco in the winter (n = 233) and fall (n = 346) of 1989. a research team accompanied the travelers, and a laboratory for enteric pathogens was established in agadir. at least one pathogen was found in 62% of the 60 diarrhea cases in winter and in 58% of the 111 diarrhea cases in fall. multiple pathogens were found less often in winter (8%) than in fall (21%, p less than .05). c ...19921730905
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