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Table 3 Discriminatory power of three typing methods for 375 sporadic S. Typhimurium isolates

From: Characterization of Salmonella Typhimurium isolates from domestically acquired infections in Finland by phage typing, antimicrobial susceptibility testing, PFGE and MLVA

Method No. of profiles Simpson’s DI (95 % CI) Shannon’s DI (Hmin-Hmax)
PT 31 0.749 (0.703-0.794) H’ = 3.127 (0.795-4.954), J = 0.631
Xbal-PFGE 83 0.829 (0.792-0.865) H’ = 4.207 (2.148-6.375), J = 0.660
5-loci MLVA 111 0.867 (0.835-0.898) H’ = 4.697 (2.862-6.794, J = 0.691
  1. PT, Phage typing
  2. PFGE, Pulsed-field gel electrophoresis
  3. MLVA, Multilocus variable-number tandem repeat analysis
  4. DI, Simpson’s diversity index
  5. 95 % CI, Confidence Interval, precision of the diversity index, expressed as 95 %
  6. upper & lower boundaries
  7. H, Indicator of species richness
  8. J, Indicator of the evenness of subtype distribution
  9. H min -H max , Precision of the Shannon’s diversity index (H’)