title: Differentiation of Salmonella typhi strains by ribosomal RNA gene restriction patterns.
abstract: Owing to the limited value of phage typing to determine the epidemiological association of Salmonella typhi (S. typhi) strains isolated from the source of typhoid fever, we analyzed ribosomal RNA (rRNA) gene restriction patterns to differentiate the independently isolated strains of identical phage type. The data showed that the restriction patterns of PstI was most polymorphic among four enzymes (BamHI, EcoRI, PstI, and SmaI) used, which revealed 13 types among 25 strains belonged to 4 phage types, 1 untypable and 2 not-determined strains. Total 25 strains of S. typhi were divided into 15 combination types by the rRNA restriction patterns with three enzymes (BamHI, PstI, and SmaI).
authors.affiliation: Division of Serology, National Institute of Preventive Medicine, Department of Health, Taipei City, Taiwan.
authors.forename: W H
authors.initials: WH
authors.lastname: Chou
authors.forename: K L
authors.initials: KL
authors.lastname: Sou
authors.forename: J L
authors.initials: JL
authors.lastname: Tsai
authors.forename: A
authors.initials: A
authors.lastname: Nakamura
authors.forename: C B
authors.initials: CB
authors.lastname: Horng
authors.forename: T C
authors.initials: TC
authors.lastname: Tseng
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D015373:Bacterial Typing Techniques; D002675:Child, Preschool; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012150:Polymorphism, Restriction Fragment Length; D012329:RNA, Bacterial / Q000032:analysis*; D012335:RNA, Ribosomal / Q000032:analysis*; D015183:Restriction Mapping / Q000379:methods*; D012485:Salmonella typhi / Q000145:classification* / Q000235:genetics*; D013624:Taiwan / Q000453:epidemiology; D014435:Typhoid Fever / Q000453:epidemiology / Q000382:microbiology
chemical_list: D012329:RNA, Bacterial; D012335:RNA, Ribosomal