Veggies Recalled for Possible Listeria Risk

Among the dozens of products are several from Del Monte, HEB, Trader Joe’s, Kroger, and the Marketside brand sold at Walmart.
Source: WebMD Health - Category: Consumer Health News Source Type: news

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Publication date: Available online 15 November 2019Source: Biochimica et Biophysica Acta (BBA) - BiomembranesAuthor(s): Carolina Medina Amado, Carlos J. Minahk, Eduardo Cilli, Rafael G. Oliveira, Fernando G. DupuyAbstractThe mechanism of action of the anti-Listeria peptide enterocin CRL35 was studied with biophysical tools by using lipid mixtures that mimicked Gram-positive plasma membranes. Langmuir monolayers and infrared spectroscopy indicated that the peptide readily interacted with phospholipid assembled in monolayers and bilayers to produce a dual effect, depending on the acyl chains. Indeed, short chain mixtures wer...
Source: Biochimica et Biophysica Acta (BBA) Biomembranes - Category: Biochemistry Source Type: research
Here is yet another food recall for bacteria contamination.
Source: Forbes.com Healthcare News - Category: Pharmaceuticals Authors: Source Type: news
Publication date: Available online 14 November 2019Source: Food ChemistryAuthor(s): Selina Brighina, Cristina Restuccia, Elena Arena, Rosa Palmeri, Biagio FallicoAbstractThe antibacterial activities of the dicarbonyl compounds glyoxal (GO), methylglyoxal (MGO), 3-deoxyglucosone (3-DG) were assessed against Gram-positive and Gram-negative pathogenic and food spoilage bacteria, both in agarised and liquid assay system. The kinetics of dicarbonyls’ degradation at different antimicrobial assay conditions were studied, to determine the possible interference of the nutrient medium.In agarised assay system, GO and MGO exhib...
Source: Food Chemistry - Category: Food Science Source Type: research
Bacterial microcompartments (BMCs) are proteinaceous organelles that optimize specific metabolic pathways referred to as metabolosomes involving transient production of toxic volatile metabolites such as aldehydes. Previous bioinformatics analysis predicted the presence of BMCs in 23 bacterial phyla including foodborne pathogens and a link with gene clusters for the utilization of host-derived substrates such as 1,2-propanediol utilization, i.e., the Pdu cluster. Although, transcriptional regulation of the Pdu cluster and its role in Listeria monocytogenes virulence in animal models have recently been reported, the experim...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
High temperature requirement A (HtrA) is a widely expressed chaperone and serine protease in bacteria. HtrA proteases assemble and hydrolyze misfolded proteins to enhance bacterial survival under stress condit...
Source: BMC Microbiology - Category: Microbiology Authors: Tags: Research article Source Type: research
In this study, the influence of temperature and growth phase on the response of L. monocytogenes to blue light was investigated and the global transcriptional response to blue light was elucidated using an RNAseq-based approach. Stationary phase cells were found to be significantly more resistant to killing by blue light (470 nm) than exponential phase cells. Temperature also had a marked effect on blue light resistance with cells cultured at 37°C being much more sensitive than cells grown at 30°C. The role of σB in light tolerance was confirmed but this effect was observed only at 30°C. σB activati...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
Foodborne Pathogens and Disease, Ahead of Print.
Source: Foodborne Pathogens and Disease - Category: Food Science Authors: Source Type: research
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Source: International Journal of Environmental Analytical Chemistry - Category: Chemistry Authors: Source Type: research
Taher, Inc., in conjunction with Mann Packing Co., as part of a multi-state recall due to the potential risk of Listeria monocytogenes, in an abundance of caution is announcing a voluntary recall of vegetable cups served in select locations in Minnesota.
Source: FDA Food Safety - Category: Food Science Authors: Source Type: alerts
The objective of this study was to develop a qPCR method for specific enumeration of viable Listeria monocytogenes in food processing facilities and heat treated products. Primers specific for L. monocytogenes were designed to amplify a short (199 bp) or long (1561 bp) fragment of the listeriolysin (hly) gene. The short- and long-amplicon qPCR methods with and without propidium monoazide (PMA) treatment of the cells were tested for their ability to discriminate between viable (no heat) and heat-killed cells (90 °C, 10 min). The PMA-qPCR methods were subsequently used to assess the survival of L. monocytogenes durin...
Source: Food Microbiology - Category: Food Science Authors: Tags: Food Microbiol Source Type: research
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