FIG. 1.

Dendrogram showing the pattern relatedness among the 77 strains of Salmonella Typhimurium (STM) and its monophasic variant included in this study. The dendrogram was generated by the BioNumerics software program. Similarity analysis was performed using the Dice coefficient (optimization [Opt], 1.00%; tolerance [Tol], 1.00%), and clustering was done by the unweighted pair group method with arithmetic mean (UPGMA). IT, Italy; UK, United Kingdom; DEN, Denmark. Antibiogram designations: A, ampicillin; S, streptomycin; Su, sulfonamides; T, tetracycline.