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  • Title: Natural history of enteroaggregative and enterotoxigenic Escherichia coli infection among US travelers to Guadalajara, Mexico.
    Author: Adachi JA, Ericsson CD, Jiang ZD, DuPont MW, Pallegar SR, DuPont HL.
    Journal: J Infect Dis; 2002 Jun 01; 185(11):1681-3. PubMed ID: 12023779.
    Abstract:
    The natural history of enteroaggregative Escherichia coli (EAEC) and enterotoxigenic E. coli (ETEC) infection was studied among 40 US travelers who provided weekly stool samples for 4 weeks after arrival in Mexico. At enrollment, 5 subjects were colonized by EAEC and 3 by ETEC. During the first 2 weeks after enrollment, 12 developed EAEC diarrhea, 7 developed ETEC diarrhea (5 with mixed EAEC/ETEC diarrhea), 13 had EAEC colonization, and 7 had ETEC colonization. During the third and fourth weeks, 4 experienced EAEC diarrhea, 2 experienced ETEC diarrhea (1 with mixed EAEC/ETEC diarrhea), 31 had EAEC colonization, and none had ETEC colonization. Plasmid DNA analysis showed a high degree of heterogeneity among EAEC isolates. Symptomatic EAEC infection occurred early after arrival in Guadalajara, Mexico, and was as common as ETEC infection. Asymptomatic EAEC infection was recurrent.
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