Bacterial diversity of floor drain biofilms and drain waters in a Listeria monocytogenes contaminated food processing environment

International Journal of Food Microbiology
Monika DzieciolStephan Schmitz-Esser

Abstract

Sanitation protocols are applied on a daily basis in food processing facilities to prevent the risk of cross-contamination with spoilage organisms. Floor drain water serves along with product-associated samples (slicer dust, brine or cheese smear) as an important hygiene indicator in monitoring Listeria monocytogenes in food processing facilities. Microbial communities of floor drains are representative for each processing area and are influenced to a large degree by food residues, liquid effluents and washing water. The microbial communities of drain water are steadily changing, whereas drain biofilms provide more stable niches. Bacterial communities of four floor drains were characterized using 16S rRNA gene pyrosequencing to better understand the composition and exchange of drain water and drain biofilm communities. Furthermore, the L. monocytogenes contamination status of each floor drain was determined by applying cultivation-independent real-time PCR quantification and cultivation-dependent detection according to ISO11290-1. Pyrosequencing of 16S rRNA genes of drain water and drain biofilm bacterial communities yielded 50,611 reads, which were clustered into 641 operational taxonomic units (OTUs), affiliated to 16 phyla d...Continue Reading

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Citations

Nov 3, 2016·Frontiers in Microbiology·Laura M CoughlanAvelino Alvarez-Ordóñez
Jan 20, 2018·Annual Review of Food Science and Technology·Francesca De FilippisDanilo Ercolini
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Feb 18, 2021·Future Microbiology·Lei YuanZhenquan Yang
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Jan 18, 2021·International Journal of Food Microbiology·Adrián Alvarez-MolinaAvelino Alvarez-Ordóñez
Oct 7, 2021·The Journal of Microbiology·Chen-Jian LiuXiao-Ran Li

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