Detection probability of Campylobacter |
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Authors: | EG Evers J Post FF Putirulan FJ van der Wal |
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Affiliation: | aNational Institute for Public Health and the Environment, P.O. Box 1, 3720 BA Bilthoven, The Netherlands;bCentral Veterinary Institute of Wageningen UR, P.O. Box 65, 8200 AB Lelystad, The Netherlands |
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Abstract: | A rapid presence/absence test for Campylobacter in chicken faeces is being evaluated to support the scheduling of highly contaminated broiler flocks as a measure to reduce public health risks Nauta, M. J., & Havelaar, A. H. (2008). Risk-based standards for Campylobacter in the broiler meat chain. Food Control, 19, 372–381]. Although the presence/absence test is still under development, an example data set of test results is analysed to illustrate the benefit of the detection probability concept. The detection probability of Campylobacter increases with the logarithm of the Campylobacter concentration in faeces according to an S-shaped curve which stretches about 2–3 log units. The detection probability is 50% at a Campylobacter concentration of 7.4 × 106 cfu/g. The uncertainty in the detection probability is 32% at the most for a 90% confidence interval. This type of information allows for realistic calculations on the Campylobacter status of different food processing paths after splitting. Usable quantitative estimates on detection probability await a data set of test results from a test that is ready for use or has similar properties. |
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Keywords: | Detection probability Food processing Pathogen concentration Scheduling |
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