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A biochemical subdivision of one phage type of Salmonella typhimurium

Published online by Cambridge University Press:  15 May 2009

M. J. Lewis
Affiliation:
The Guinness-Lister Research Unit, Lister Institute, London
B. A. D. Stocker
Affiliation:
The Guinness-Lister Research Unit, Lister Institute, London
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Summary

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A total of 1537 strains of Salmonella typhimurium belonging to seven prevalent phage types were examined on solid media for their ability to ferment rhamnose, xylose and inositol, for colicine production and for nutritional requirements. Most of the strains in each phage type were almost completely homogeneous, especially in their sugar fermentation reactions. However, strains of phage type 1a/2 were not homogeneous, but could be assigned to one of four subgroups on the basis of ability to ferment inositol, inhibition of growth by meso-tartrate and auxotrophy for nicotinic acid. The subdivision proved to have epidemiological value. The inhibition of growth by meso-tartrate was observed on a denned medium containing citrate as the energy source. Inhibition did not occur if glucose, casein hydrolysate or aspartic acid were added to the medium.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1971

References

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