Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 506356
Title Microbial testing in food safety : Effect of specificity and sensitivity on sampling plans - how does the OC curve move
Author(s) Zwietering, Marcel H.; Besten, Heidy M.W. den
Source Current Opinion in Food Science 12 (2016). - ISSN 2214-7993 - p. 42 - 51.
Department(s) Food Microbiology Laboratory
Publication type Refereed Article in a scientific journal
Publication year 2016

Obviously the quality of test methods does have an impact on the performance of sampling plans. A low sensitivity means that actual positive samples are tested negative (i.e. false negatives) and moves the Operating Characteristic (OC) curve to the right. Values of sensitivity above 0.70 do not show large effects on the position of the OC curve. A low specificity means that actual negative samples are tested positive (i.e. false positives) and moves the OC curve to the left. The effect of the specificity of the testing method has a very large effect on the performance of a sampling plan, especially for sampling plans with higher numbers of samples. In those cases specificity should be much larger than 0.99 to have a reasonable performance.

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