IS200fingerprint ofSalmonella entericaserotype Typhimurium human strains isolated in Sardinia

A collection ofSalmonella entericaserotype Typhimurium human strains isolated in Northern Sardinia (Italy) was examined for the insertion sequence IS200, phage type, antibiotic profile, ribotyping polymorphisms and plasmid profile. All clinical isolates studied contained from 4 to 10 copies of the IS200element. IS200permitted to discriminate Typhimurium strains and to identify five IS200types, some of them circulating in Sardinia at least since 1900. Strains belonging to phage DT104 predominated and correlated with a specific IS200pattern.