Immunocapture and Real-Time PCR To Detect Campylobacter spp.

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Abstract:

In this work, the feasibility of using a large-volume immunocapture system as a sample pretreatment before detection of Campylobacter was studied. Real-time PCR was used for detection of captured cells after immunocapture. This immunocapture system is able to process high-volume samples by recirculation, increasing the possibility of capturing cells in low numbers. After 30 min of recirculation, the sample is concentrated from 250 ml to 200 μl. In this study, different parameters were compared in order to improve cell capture. The analysis of inoculated chicken skin showed that detection of Campylobacter at levels of 103 CFU/25 g was possible after 8 h of enrichment. The low recovery of Campylobacter cells (<1%) makes this separation method qualitative rather than quantitative. The detection limit of the entire protocol was increased due to the low cell recovery of the sample pretreatment. Therefore, this immunoseparation is able to recover cells present in high concentration after enrichment but not cells present in low concentration. Isolation of Campylobacter cells is achievable using this separation method rather than rapid detection.

Document Type: Research Article

Affiliations: 1: Department of Food Science, University of Guelph, Guelph, Ontario, Canada N1G 2W1; Canadian Research Institute for Food Safety, 43 McGilvray Street, Guelph, Ontario, Canada N1G 2W1 2: Canadian Research Institute for Food Safety, 43 McGilvray Street, Guelph, Ontario, Canada N1G 2W1; Department of Medical Microbiology, University Hospital of Maastricht, Peter Debyelaan 25, P.O. Box 5800, 6202 AZ, Maastricht, The Netherlands

Publication date: December 1, 2008

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