PFGE results. Isolates collected from subsamples M showing a high degree of similarity (> 90%) to isolates collected from subsample A. Pairwise comparisons were done using the Dice correlation and clustering analyses with the unweighted pair group mathematical average (UPGMA) clustering algorithm of BioNumerics ver. 5 (Applied Maths, Austin, TX, USA). The optimization tolerance was set at 2% and the position tolerance for band analysis was set at 4%.
Zhou et al. BMC Microbiology 2011 11:175 doi:10.1186/1471-2180-11-175