Detalle Publicación

Improving the methodology for Listeria monocytogenes detection in smoked salmon by using the wet pooling test

Título de la revista: INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
ISSN: 0168-1605
Volumen: 184
Páginas: 109 - 112
Fecha de publicación: 2014
Resumen:
Controlling Listeria monocytogenes in smoked salmon is still a challenge for food business operators. The reported lowlevels and uneven distribution of the pathogenmake it necessary to apply good sampling plans and analytical procedures in order to detect contaminated batches. However, analyses are expensive and due to current economic situations, usually only one sample per lot is checked instead of the n = 5 samples established in Regulation (EC) No 2073/2005. This work proposes the investigation of L. monocytogenes by pooling pre-enriched Half Fraser from several units from a batch (n = 6). The results obtained from a preliminary in-house validation (n = 51 pools) showed that the performance characteristics (sensitivity and specificity) are very high (N95%). This high reliability, together with reduced costs (nearly half), suggests that the wet pooling test could be a good cost-effective approach for investigating L.monocytogenes in smoked salmon. Additional research is needed before this approach can be used for other foodmatrices, such as determining the maximumnumber of units per batch that can be pooled with effective detection of L. monocytogenes.
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