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Numerical index of the discriminatory ability of biotyping for strains of Salmonella typhimurium and Salmonella paratyphi B

Published online by Cambridge University Press:  15 May 2009

D.C Old  and
R.M. Barker
D.C Old
Affiliation:
Department of Medical Microbiology, The University of Dundee Medical School, Ninewells Hospital, Dundee DD1 9SY
R.M. Barker
Affiliation:
Department of Medical Microbiology, The University of Dundee Medical School, Ninewells Hospital, Dundee DD1 9SY
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An index of discrimination was used to assess the discriminatory power of biotyping for salmonellas of selected serotypes. Three collections of phage-typed strains of Salmonella typhimurium and Salmonella paratyphi B, previously tested for biotype, were examined. The results established that the discrimination index was high when full biotyping alone was used for differentiation of strains from international series. When biotyping was combined with phage typing, the discrimination achieved was greater than for either method used alone. These findings confirm that biotyping affords excellent discrimination of strains of S. typhimurium and S. paratyphi B and indicate that the results obtained from biotyping can be interpreted with confidence.

Type
Research Article
Information
Epidemiology & Infection , Volume 103 , Issue 3 , December 1989 , pp. 435 - 443
Copyright
Copyright © Cambridge University Press 1989

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