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Biointerface Research in Applied Chemistry, 04/2021, Letnik: 11, Številka: 2Journal Article
In order to shed light on contamination risks along the ready-to-eat chain of fresh commodities by emerging foodborne pathogens, we investigated the biofilm development in vitro of two Pseudomonas aeruginosa strains on fresh-cut lettuce (Lactuca sativa L. var. Iceberg). The experiment was performed employing a floating bioreactor system where modified atmosphere package conditions were mimicked, and fresh-cut lettuce disks of 2 cm2 were put into contact with a 106 CFU/mL of a phenotypic mucoid P. aeruginosa phenotype (muc+) or a non-mucoid one (muc-). Following a simulated 2-day refrigerated-shelf quantitative Real-Time PCR, designed on a target gene region of the 16S rRNA gene, defined the different muc phenotypes behavior on biofilm in lettuce phyllo-plane. Between the two strains, a development difference of nearly 1.0 log CFU/cm2 occurred, with the muc+ phenotype being the most settled and adherent. This result clearly showed a distinct contamination risk according to P. aeruginosa phenotype and the need to develop real-time, specific, fast, and easy to use detection protocols along with specific sanitation systems for modified atmosphere package ready-to-eat commodities.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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