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https://www.readbyqxmd.com/read/28527368/effects-of-parsley-extract-powder-as-an-alternative-for-the-direct-addition-of-sodium-nitrite-in-the-production-of-mortadella-type-sausages-impact-on-microbiological-physicochemical-and-sensory-aspects
#1
Greta Riel, Annika Boulaaba, Johanna Popp, Guenter Klein
Increasing concern about chemical additives in processed meat has led to an increased market of uncured and alternatively cured meat products. However, the use of vegetable extracts or the exclusion of curing salt may increase the risk of greater bacterial growth and alteration of several physicochemical parameters. Therefore, in this study mortadella-type sausages, manufactured with 1.07 (V3), 2.14 (V4) and 4.29 (V5) g parsley extract powder/kg sausage meat were produced. These sausage variants were compared to an uncured (V2) and a traditionally nitrite-cured control (V1)...
May 12, 2017: Meat Science
https://www.readbyqxmd.com/read/28527182/water-for-agriculture-the-convergence-of-sustainability-and-safety
#2
Sarah M Markland, David Ingram, Kalmia E Kniel, Manan Sharma
Agricultural water is a precious and limited resource. Increasingly more water types and sources are being explored for use in irrigation within the United States and across the globe. As outlined in this chapter, the Produce Safety Rule (PSR) in the Food Safety and Modernization Act (FSMA) provide irrigation water standards for application of water to fruits and vegetables consumed raw. These rules for production and use of water will continue to develop and be required as the world experiences aspects of a changing climate including flooding as well as drought conditions...
May 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28526786/impact-of-acanthamoeba-cysts-on-stress-resistance-of-salmonella-enterica-serovar-typhimurium-yersinia-enterocolitica-4-o-3-listeria-monocytogenes-1-2a-and-escherichia-coli-o-26
#3
Ellen Lambrecht, Julie Baré, Koen Sabbe, Kurt Houf
The formation of robust resting cysts enables Acanthamoeba to resist harsh environmental conditions. This study investigated to what extent these cysts are resistant to physical and chemical stresses as applied in food industry cleaning and disinfection procedures. Moreover it was assessed whether certain intracystic meatborne bacterial pathogens are more stress-resistant than free-living bacterial monocultures and if intracystic passage and subsequent association with trophozoites induces cross-tolerance towards other stressors...
May 19, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28526589/a-rapid-salmonella-detection-method-involving-thermophilic-helicase-dependent-amplification-and-a-lateral-flow-assay
#4
Xin-Jun Du, Tian-Jiao Zhou, Ping Li, Shuo Wang
Salmonella is a major foodborne pathogen that is widespread in the environment and can cause serious human and animal disease. Since conventional culture methods to detect Salmonella are time-consuming and laborious, rapid and accurate techniques to detect this pathogen are critically important for food safety and diagnosing foodborne illness. In this study, we developed a rapid, simple and portable Salmonella detection strategy that combines thermophilic helicase-dependent amplification (tHDA) with a lateral flow assay to provide a detection result based on visual signals within 90 min...
May 16, 2017: Molecular and Cellular Probes
https://www.readbyqxmd.com/read/28525985/investigation-of-optimum-ohmic-heating-conditions-for-inactivation-of-escherichia-coli-o157-h7-salmonella-enterica-serovar-typhimurium-and-listeria-monocytogenes-in-apple-juice
#5
Il-Kyu Park, Jae-Won Ha, Dong-Hyun Kang
BACKGROUND: Control of foodborne pathogens is an important issue for the fruit juice industry and ohmic heating treatment has been considered as one of the promising antimicrobial interventions. However, to date, evaluation of the relationship between inactivation of foodborne pathogens and system performance efficiency based on differing soluble solids content of apple juice during ohmic heating treatment has not been well studied. This study aims to investigate effective voltage gradients of an ohmic heating system and corresponding sugar concentrations (°Brix) of apple juice for inactivating major foodborne pathogens (E...
May 19, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28518026/outbreak-related-disease-burden-associated-with-consumption-of-unpasteurized-cow-s-milk-and-cheese-united-states-2009-2014
#6
Solenne Costard, Luis Espejo, Huybert Groenendaal, Francisco J Zagmutt
The growing popularity of unpasteurized milk in the United States raises public health concerns. We estimated outbreak-related illnesses and hospitalizations caused by the consumption of cow's milk and cheese contaminated with Shiga toxin-producing Escherichia coli, Salmonella spp., Listeria monocytogenes, and Campylobacter spp. using a model relying on publicly available outbreak data. In the United States, outbreaks associated with dairy consumption cause, on average, 760 illnesses/year and 22 hospitalizations/year, mostly from Salmonella spp...
June 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28516064/a-novel-role-of-listeria-monocytogenes-membrane-vesicles-in-inhibition-of-autophagy-and-cell-death
#7
Svitlana Vdovikova, Morten Luhr, Paula Szalai, Lars Nygård Skalman, Monika K Francis, Richard Lundmark, Nikolai Engedal, Jörgen Johansson, Sun N Wai
Bacterial membrane vesicle (MV) production has been mainly studied in Gram-negative species. In this study, we show that Listeria monocytogenes, a Gram-positive pathogen that causes the food-borne illness listeriosis, produces MVs both in vitro and in vivo. We found that a major virulence factor, the pore-forming hemolysin listeriolysin O (LLO), is tightly associated with the MVs, where it resides in an oxidized, inactive state. Previous studies have shown that LLO may induce cell death and autophagy. To monitor possible effects of LLO and MVs on autophagy, we performed assays for LC3 lipidation and LDH sequestration as well as analysis by confocal microscopy of HEK293 cells expressing GFP-LC3...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28515656/isolation-and-characterization-of-listeria-phages-for-control-of-growth-of-listeria-monocytogenes-in-milk
#8
Sunhee Lee, Min Gon Kim, Hee Soo Lee, Sunhak Heo, Mirae Kwon, GeunBae Kim
In this study, two Listeria bacteriophages, LMP1 and LMP7, were isolated from chicken feces as a means of biocontrol of L. monocytogenes. Both bacteriophages had a lytic effect on L. monocytogenes ATCC 7644, 15313, 19114, and 19115. Phages LMP1 and LMP7 were able to inhibit the growth of L. monocytogenes ATCC 7644 and 19114 in tryptic soy broth at 10°C and 30°C. Nevertheless, LMP1 was more effective than LMP7 at inhibiting L. monocytogenes ATCC 19114. On the contrary, LMP7 was more effective than LMP1 at inhibiting L...
2017: Korean Journal for Food Science of Animal Resources
https://www.readbyqxmd.com/read/28515653/assessment-of-microbial-and-radioactive-contaminations-in-korean-cold-duck-meats-and-electron-beam-application-for-quality-improvement
#9
Kyung-A An, Yunhee Jo, Muhammad Sajid Arshad, Gui-Ran Kim, Cheorun Jo, Joong-Ho Kwon
Animal-origin food products pose serious threat to public food safety due to high microbial loads. The microbial and radioactive contaminations in commercial cold duck meat products were evaluated. Ten different lots of commercial samples (C1-C10) were classified based on type and smoking process. All samples were highly contaminated (< 4-7 Log CFU/g) with total aerobic bacteria (TAB), yeasts and molds (Y&M), and 7 samples (C1-C7) were positive for coliforms. Furthermore, three samples were contaminated with Listeria monocytogenes (C4-C6) and one with Salmonella typhimurium (C6)...
2017: Korean Journal for Food Science of Animal Resources
https://www.readbyqxmd.com/read/28509139/unusual-listeria-monocytogenes-peritonitis-in-peritoneal-dialysis-patient-with-liver-cirrhosis-a-case-report-and-review-of-literature
#10
Miloš Mitrović, P Đurić, A Janković, V Todorov, J Tošić-Dragović, N Simović, T Damjanović, N Dimković
Spontaneous Listeria peritonitis is well described in liver failure, but is uncommon in peritoneal dialysis patients. Atypical cases where peritonitis symptoms develop after systemic manifestations are rare and challenging for diagnostic. A 57-year-old peritoneal dialysis patient with history of ethylic cirrhosis was admitted after epileptic seizure. On admission, patient was soporous without signs of peritonitis and meningitis. Patient's peritoneal effluent was clear, with normal leukocytes. Cranial CT scan showed no abnormalities...
May 2017: CEN Case Reports
https://www.readbyqxmd.com/read/28508453/tetr-dependent-gene-regulation-in-intracellular-listeria-monocytogenes-demonstrates-the-spatiotemporal-surface-distribution-of-acta
#11
Sibylle Schmitter, Lars Fieseler, Jochen Klumpp, Ralph Bertram, Martin J Loessner
To enable specific and tightly controlled gene expression both in-vitro and during the intracellular lifecycle of the pathogen Listeria monocytogenes, a TetR-dependent genetic induction system was developed. Highest concentration of cytoplasmic TetR and best repression of tetO-controlled genes was obtained by tetR expression from the synthetic promoter Pt17 . Anhydrotetracycline (ATc) as inducer permitted concentration-dependent, fine-tuned expression of genes under control of the tetO operator and a suitable promoter...
May 15, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28508419/case-control-study-shows-that-neonatal-pneumococcal-meningitis-cannot-be-distinguished-from-group-b-streptococcus-cases
#12
Alexandra Arfi, Robert Cohen, Emmanuelle Varon, Stéphane Béchet, Stéphane Bonacorsi, Corinne Levy
AIM: Streptococcus pneumoniae (S. pneumoniae) is sometimes implicated in neonatal bacterial meningitis. This study described the demographic, clinical and biological features of neonatal S. pneumoniae meningitis and compared pneumococcal and group B streptococcal (GBS) neonatal meningitis. METHODS: We conducted a case-control study that compared neonates, aged one to 28 days with S. pneumoniae meningitis or GBS meningitis. Each case with S. pneumoniae was randomly matched to four control patients with GBS by age group and study year...
May 16, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28507070/limited-colonization-undermined-by-inadequate-early-immune-responses-define-the-dynamics-of-decidual-listeriosis
#13
Gabrielle Rizzuto, Elisa Tagliani, Priyanka Manandhar, Adrian Erlebacher, Anna I Bakardjiev
The bacterial pathogen Listeria monocytogenes causes a food-borne systemic disease in pregnant women that can lead to preterm labor, stillbirth, or severe neonatal disease. Colonization of the maternal decidua appears to be an initial step in the maternal component of the disease as well as bacterial transmission to the placenta and fetus. Host-pathogen interactions in the decidua during this early stage of infection remain poorly understood. Here, we assessed the dynamics of L. monocytogenes infection in primary human decidual organ cultures and in the murine decidua in vivo...
May 15, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28505584/development-of-a-gold-nanoparticle-based-universal-oligonucleotide-microarray-for-multiplex-and-low-cost-detection-of-foodborne-pathogens
#14
Xiaoqiang Wang, Sisi Ying, Xiaoguang Wei, Jun Yuan
Bacterial foodborne diseases remain major threats to food safety and public health, especially in developing countries. In this study a novel assay, combining gold nanoparticle (GNP)-based multiplex oligonucleotide ligation-PCR and universal oligonucleotide microarray technology, was developed for inexpensive, specific, sensitive, and multiplex detection of eight common foodborne pathogens, including Shigella spp., Campylobacter jejuni, Bacillus cereus, Escherichia coli O157:H7, Listeria monocytogenes, Salmonella enterica, Staphylococcus aureus, and Vibrio parahaemolyticus...
May 9, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28504145/preparation-and-properties-of-carbohydrate-based-composite-films-incorporated-with-cuo-nanoparticles
#15
Shiv Shankar, Long-Feng Wang, Jong-Whan Rhim
The present study aimed to develop the carbohydrate biopolymer based antimicrobial films for food packaging application. The nanocomposite films of various biopolymers and copper oxide nanoparticles (CuONPs) were prepared by solvent casting method. The nanocomposite films were characterized using SEM, FTIR, XRD, and UV-vis spectroscopy. The thermal stability, UV barrier, water vapor permeability, and antibacterial activity of the composite films were also evaluated. The surface morphology of the films was dependent on the types of polymers used...
August 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28502590/spontaneous-bacterial-peritonitis-due-to-listeria-monocytogenes-always-to-be-remembered
#16
R Gaspar, S Rodrigues, G Macedo
No abstract text is available yet for this article.
May 11, 2017: Clinics and Research in Hepatology and Gastroenterology
https://www.readbyqxmd.com/read/28499357/identification-of-a-major-listeria-monocytogenes-outbreak-clone-linked-to-soft-cheese-in-northern-italy-2009-2011
#17
Ettore Amato, Virginia Filipello, Maria Gori, Sara Lomonaco, Marina Nadia Losio, Antonio Parisi, Pol Huedo, Stephen John Knabel, Mirella Pontello
BACKGROUND: Molecular subtyping and enhanced surveillance in Lombardy region identified a cluster of possibly related listeriosis cases from 2006 to 2010. This cluster grouped 31 isolates that belonged to serotype 1/2a and Sequence Type 38 (ST38) as defined by Multilocus Sequence Typing (MLST). METHODS: Our study expanded the previous investigation to include cases from 2011 to 2014 and used Multi-Virulence-Locus Sequence Typing (MVLST) on all ST38 isolates to better understand their epidemiology and possibly identify a common source outbreak...
May 12, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28496990/mtorc1-regulates-mannose-6-phosphate-receptor-transport-and-t-cell-vulnerability-to-regulatory-t-cells-by-controlling-kinesin-kif13a
#18
Khawaja Ashfaque Ahmed, Jim Xiang
Mannose-6-phosphate receptor (M6PR) that facilitates cellular uptake of M6P-bearing proteins, including serine-protease granzyme-B (Gzm-B) has an important role in T-cell activation, migration and contraction. However, molecular mechanisms controlling M6PR expression in T cells remain poorly understood. Here, we show that M6PR expression on T cells is distinctively controlled by two common γ-chain cytokines interleukin-2 (IL-2) and IL-7, and the differential M6PR expression is not caused by an altered synthesis of M6PR protein, but is a result of distinct regulation of kinesin-3 motor-protein KIF13A that transport M6PR onto cell surfaces...
2017: Cell Discovery
https://www.readbyqxmd.com/read/28495780/genome-sequences-of-listeria-monocytogenes-strains-with-resistance-to-arsenic
#19
Vikrant Dutta, Sangmi Lee, Todd J Ward, Nathane Orwig, Eric Altermann, Dereje D Jima, Cameron Parsons, Sophia Kathariou
Listeria monocytogenes frequently exhibits resistance to arsenic. We report here the draft genome sequences of eight genetically diverse arsenic-resistant L. monocytogenes strains from human listeriosis and food-associated environments. The availability of these genomes will help elucidate the role of heavy-metal resistance in the ecology of L. monocytogenes.
May 11, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28495767/complete-genome-sequences-of-12-isolates-of-listeria-monocytogenes-belonging-to-serotypes-1-2a-1-2b-and-4b-obtained-from-food-products-and-food-processing-environments-in-canada
#20
Walid Mottawea, Shu Chen, Saleema Saleh-Lakha, Sebastien Belanger, Dele Ogunremi
Listeria monocytogenes is the etiological agent for an often fatal foodborne illness known as listeriosis. Here, we present the complete genome sequences of 12 L. monocytogenes isolates representing the three most common serotypes of this pathogen (1/2a, 1/2b, and 4b), collected in Canada from different food products and environmental sources.
May 11, 2017: Genome Announcements
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