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Dice similarity coefficients (percent). The dendrogram was obtained from cluster analysis of XbaI macrorestriction patterns of 30 S. Typhimurium isolates from humans (SH), cattle (SB), poultry (SA), and pigs (SP) isolated between 1995 and 1996. Asterisks indicate nalidixic acid-strains. SH96-6 is strain Haddar, SA96-3 is strain Bovis morbificans, and SP96-10 is nontypeable.
