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(a to c) Detection of specific ERIC-PCR genotypes representing isolates (n = 11,768) within the 5 sites sampled during the study (a), during the 4 years of the study (b), and during each season (c). (d) Genotypes of waterborne isolates were clustered with a reference collection (n = 10,966) of fecal E. coli strains, and their identities with the genotypes of isolates from the fecal sources (livestock and companion animals, avian wildlife, mammalian wildlife, human) were established.
