SunOpta Announces Second Expansion of Voluntarily Recall on Market District Pre-Packaged and Bulk Sunflower Seeds Sold at Market District Stores

Giant Eagle supplier SunOpta has notified the retailer of a second expansion of the previously reported product recall on its sunflower seeds sold in the bulk section of three central Ohio Market District stores due to possible Listeria monocytogenes (Listeria) contamination.
Source: Food and Drug Administration - Category: Food Science Source Type: news

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Publication date: Available online 21 May 2019Source: Microbial PathogenesisAuthor(s): So-Hyun Jun, Taewon Lee, Je-Chul Lee, Ji-Hyun ShinAbstractWe have previously shown that Listeria monocytogenes, a causative agent of listeriosis, can produce membrane vesicles (MVs) during in vitro culture. The aim of this study was to investigate the ability of MVs from L. monocytogenes cultured with or without salt stress to induce cytotoxicity and pro-inflammatory responses in colon epithelial Caco-2 cells. MVs were purified from wild-type L. monocytogenes 10403S strain and an isogenic ΔsigB mutant strain. MVs from both wild-t...
Source: Microbial Pathogenesis - Category: Infectious Diseases Source Type: research
ConclusionsFor the first time, a listeria vaccine-based immunotherapy was shown to be able to induce a tumor antigen-specific T cell response within the tumor microenvironment of a “cold” tumor such as PDAC and sensitize the tumor to checkpoint inhibitor therapy. Moreover, this combination immunotherapy led to objective tumor responses and survival benefit in the mice with spontaneously developed PDAC tumors. Therefore, our study supports developing Lm-ANXA2 as a therapeut ic agent in combination with anti-PD-1 antibody for PDAC treatment.
Source: Journal for Immunotherapy of Cancer - Category: Cancer & Oncology Source Type: research
Cyclic di-AMP (c-di-AMP) is a recently discovered second messenger in bacteria. The cellular level of c-di-AMP in Streptococcus pyogenes is predicted to be controlled by the synthase DacA and two putative phosphodiesterases, GdpP and Pde2. To investigate the role of c-di-AMP in S. pyogenes, we generated null mutants in each of these proteins by gene deletion. Unlike those in other Gram-positive pathogens such as Staphylococcus aureus and Listeria monocytogenes, DacA in S. pyogenes was not essential for growth in rich media. The DacA null mutant presented a growth defect that manifested through an increased lag time, produc...
Source: Infection and Immunity - Category: Infectious Diseases Authors: Tags: Molecular Pathogenesis Source Type: research
Abstract In contrast to obligate intracellular pathogens that can remain in relatively stable host-associated environments, the soil-living bacterial pathogen Listeria monocytogenes has to sense and respond to physical and chemical cues in a variety of quite different niches. In particular, the bacterium has to survive the dramatic transition from its saprophytic existence to life within the host where nutritional stress, increased temperature, acidity, osmotic stress and the host defences present a new and challenging landscape. This review focuses on the σB and PrfA regulatory systems used by L. monocytoge...
Source: Microbiology - Category: Microbiology Authors: Tags: Microbiology Source Type: research
(Natural News) Researchers from the University College Cork made a startling discovery: Western diets – a diet comprising empty carbs, junk food, red meats, and foods high in saturated fat – can increase the risk of being infected by the foodborne pathogen, Listeria monocytogenes.  In their report, which appeared in the most recent edition of Microbiome, the scientists revealed that high-fat...
Source: - Category: Consumer Health News Source Type: news
In this study, a systematic approach was used for the improved identification of novel LAB strains able to exert antagonistic effect against important foodborne pathogens. Our findings suggest that the selected panel of LAB probiotic strains can be used as biocontrol cultures to inhibit and/or reduce the growth of L. monocytogenes, Salmonella, and E. coli O157:H7 in different matrices, and environments.
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
Publication date: Available online 15 May 2019Source: LWTAuthor(s): Mehran Moradi, Karim Mardani, Hossein TajikAbstractAnti-listeria and functional characteristics of postbiotics (metabolic byproducts of probiotics) of Lactobacillus acidophilus LA5 and L. casei 431 and L. salivarius were investigated in vitro, and in ground meat and whole milk. Antibacterial activity of all examined postbiotics was mainly associated to pyrrolo [1,2-a] pyrazine-1,4-dione and somewhat to the presence of different organic acids. Postbiotics of all Lactobacillus spp. maintained thier residual antimicrobial activity over 50% at different pH lev...
Source: LWT Food Science and Technology - Category: Food Science Source Type: research
Foodborne Pathogens and Disease, Ahead of Print.
Source: Foodborne Pathogens and Disease - Category: Food Science Authors: Source Type: research
Publication date: Available online 13 May 2019Source: LWTAuthor(s): Yiming Feng, Luis Alberto Ibarra-Sánchez, Lily Luu, Michael J. Miller, Youngsoo LeeAbstractNisin-loaded zein microcapsules were prepared in a microfluidic chip using an internal phase separation method. The release profiles of nisin from the microcapsules were modified by varying nisin loading and flow rate during the microfluidic process. Rapid release of nisin was achieved with low flow rate in dispersed phase (0.2 ml/h) and high loading (9.67–12.64 μg/mg) of nisin in the microcapsule, while slow release of nisin was achieved with hig...
Source: LWT Food Science and Technology - Category: Food Science Source Type: research
Publication date: Available online 13 May 2019Source: LWTAuthor(s): Seyed Mohammad Bagher Hashemi, Reza Roohi, Mohammad Reza Mahmoudi, Daniel GranatoAbstractInactivation of Listeria monocytogenes (serotype 4 ab), Shigella sonnei, Byssochlamys fulva and Saccharomyces cerevisiae and the degradation of β-carotene and ascorbic acid in tangerine juice subjected to pulsed-thermosonication were modeled using polynomial, log-logistic, Weibull, biphasic linear and modified Gompertz models. The models were assessed using the adjusted determination coefficient (adj-R2) and the root mean square error (RMSE). Then, Ward's cluste...
Source: LWT Food Science and Technology - Category: Food Science Source Type: research
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