A collection of Salmonella enterica serotype 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 IS200 element. IS200 permitted
to discriminate Typhimurium strains and to
identify five IS200 types, some of them circulating in
Sardinia at least since 1900. Strains
belonging to phage DT104 predominated and correlated with a specific IS200
pattern.