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Dendrogram of XbaI PFGE patterns of Klebsiella pneumoniae isolates from human and animal origins. Cluster analysis was made with BioNumerics software version 7.1 (Applied Maths, Belgium) by the unweighted-pair group method using average linkages (UPGMA) and with Dice comparison settings (optimization, 1.5%; position tolerance, 1.5%). The cutoff for determining clonality was ≥90% (21).
