Amplified bands from each primer were scored as present (1) or
absent (0). Only those bands that amplified consistently were
considered; smeared and weak bands were excluded from the analysis. Dice’s coefficient of similarity (Dij) was determined
between each pair of strains. The estimates of similarity between
strains were used for cluster analysis[38]by the Unweighted Pair
Group Method of Arithmetic Average (UPGMA;[41]) using the
NTSYS package version 2.02 for Windows.