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Quality control tests of two salmonella enrichment media using different inocula

Published online by Cambridge University Press:  15 May 2009

R. W. S. Harvey ,
T. H. Price  and
P. B. Crone
R. W. S. Harvey
Affiliation:
Regional Public Health Laboratory, University Hospital of Wales, Heath Park, Cardiff
T. H. Price
Affiliation:
Regional Public Health Laboratory, University Hospital of Wales, Heath Park, Cardiff
P. B. Crone
Affiliation:
Regional Public Health Laboratory, Institute of Pathology, General Hospital, Westgate Road, Newcastle upon Tyne
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Summary

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Inocula of polluted water naturally infected with salmonellas effectively distinguished six brands of selenite and six brands of tetrathionate enrichment media into satisfactory and unsatisfactory categories. Minimal inocula of pure cultures differentiated the tetrathionates, but not the selenites. Inocula of naturally infected chicken giblets suggested that there was a difference between two comparable brands of tetrathionate, but this was not statistically significant. The difference was, however, clearly demonstrated by minimal inocula of pure cultures.

Intensive investigation of two inferior tetrathionates revealed inhomogeneity in the distribution of brilliant green in one bottle of one brand. The importance of the salmonella serotype and even the colonial variant used for the pure culture inoculum was also demonstrated.

Type
Research Article
Information
Journal of Hygiene , Volume 74 , Issue 3 , June 1975 , pp. 375 - 384
Copyright
Copyright © Cambridge University Press 1975

References

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