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Biofilm formation in 35 pks positive E. coli isolates in M63 medium. Values are shown as mean of specific biofilm formation. Isolates demonstrating SBF values > 1.0 were considered as strong, 0.5–1.0 as moderate and <0.5 as weak biofilm formers. Majority of isolates (21/35) demonstrated strong biofilm formation; the remaining 10 and 4 isolates showed moderate and weak biofilm formation, respectively. NA097 was employed as a positive control in the biofilm formation assay.
