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Dendrogram for the ERIC-PCR pattern of E. coli isolates resistant to antibiotics with class 1 integron from superficial water calculated using the Jaccard coefficient and UPGMA clustering. Isolates T – city of Tapes; SL – city of São Lourenço do Sul; B, SM, M – estuary of Patos Lagoon. The axis indicates the similarity index and the vertical line indicates the 70% similarity cut-off. *Asterisk indicates cluster 10.
