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Assessment of an enzyme immunoassay for the detection of salmonellas in foods and animal feeding stuffs

Published online by Cambridge University Press:  19 October 2009

Lynne S. Todd ,
Diane Roberts ,
Barbara A. Bartholomew  and
R. J. Gilbert
Lynne S. Todd
Affiliation:
Food Hygiene Laboratory, Central Public Health Laboratory, 61 Colindale Avenue, London NW9 5HT.
Diane Roberts
Affiliation:
Food Hygiene Laboratory, Central Public Health Laboratory, 61 Colindale Avenue, London NW9 5HT.
Barbara A. Bartholomew
Affiliation:
Food Hygiene Laboratory, Central Public Health Laboratory, 61 Colindale Avenue, London NW9 5HT.
R. J. Gilbert
Affiliation:
Food Hygiene Laboratory, Central Public Health Laboratory, 61 Colindale Avenue, London NW9 5HT.
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Summary

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The Salmonella Bio-EnzaBead Screening Kit, in its modified form with both the MOPC 467 and the 6H4 antibodies, was used for the detection of salmonellas in naturally contaminated foods and animal feeding stuffs in parallel with a traditional cultural procedure.

Initial results showed an 82% agreement between the enzyme immunoassay (EIA) and cultural methods when using the criterion recommended by the manufacturer as a cut-off for all types of foods. By adjusting the cut-off for each type of food, the number of EIA positive, culture negative samples was reduced although the number of EIA negative, culture positive samples increased. The EIA may be more sensitive than the cultural methods as in many cases the EIA positive, culture negative results could be real positives which were not detected by the cultural methods.

The screening kit provides a simple and convenient method for the detection of salmonella in foods and feeds and a presumptive positive result can be reported within 48 h. The advantages and disadvantages of the method are discussed.

Type
Research Article
Information
Epidemiology & Infection , Volume 98 , Issue 3 , June 1987 , pp. 301 - 310
Copyright
Copyright © Cambridge University Press 1987

References

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