21,038 results match your criteria Listeria Monocytogenes

Analysis of Genetic Diversity and Antibiotic Options for Clinical Infections in China.

Open Forum Infect Dis 2021 Jun 9;8(6):ofab177. Epub 2021 Apr 9.

State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang Provincial Key Laboratory for Drug Clinical Research and Evaluation, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.

Background: The aim of this study was to investigate the mechanism of (Lm) pathogenicity and resistance. In addition, the effect of existing treatment options against Lm were systematically evaluated.

Methods: Six Lm isolates were collected and antimicrobial susceptibility testing of 15 antibiotics were done. Read More

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Investigation of brain mast cells in ovine encephalitic listeriosis.

Biotech Histochem 2021 Jun 23:1-7. Epub 2021 Jun 23.

Department of Pathology, Faculty of Veterinary Medicine, Burdur Mehmet Akif Ersoy University, Burdur, Turkey.

Mast cells in the brain are associated with increased inflammation during the acute period following exposure to infection; these cells are important for destroying the infectious agents. We investigated the relation between histopathological lesions and mast cells in sheep brains infected with . Pons and medulla regions from 17 infected and eight normal sheep brains were examined. Read More

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Meningitis caused by in a locally advanced cervical cancer patient with pyometra: A case report.

Gynecol Oncol Rep 2021 Aug 29;37:100799. Epub 2021 May 29.

Department of Obstetrics and Gynecology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.

Locally advanced cervical cancer occasionally induces pyometra, but there have been no reports of meningitis where pyometra is the cause of infection. Here, we report a case of meningitis related to pyometra during concurrent chemoradiotherapy (CCRT) in a cervical cancer patient. The patient, a 77-year-old woman, was diagnosed with Stage IIB (FIGO 2018) cervical adenocarcinoma, and CCRT was initiated. Read More

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Genetic diversity, virulence and distribution of antimicrobial resistance among isolated from milk, beef, and bovine farm environment.

Iran J Vet Res 2021 ;22(1):1-8

Department of Veterinary Public Health and Epidemiology, Madras Veterinary College, Tamil Nadu Veterinary and Animal Sciences University, Chennai-600 007, Tamil Nadu, India.

Background: is an opportunistic intracellular foodborne pathogen and is ubiquitous in nature. The occurrence of in animal production units coupled with their presence in milk, faeces, feed, water, sewage, and soil is a contributory factor for foodborne listeriosis in humans and animals.

Aims: The study was aimed to characterize genotype and serogroup of recovered from different types of samples and also to study antimicrobial patterns by phenotypic and genotypic methods. Read More

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January 2021

Counteracting Bacterial Motility: A Promising Strategy to Narrow Biofilm in Food Processing Industry.

Front Microbiol 2021 2;12:673484. Epub 2021 Jun 2.

Département de Pathologie et Microbiologie, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, QC, Canada.

() is often associated with processed food as it can form biofilms that represent a source of contamination at all stages of the manufacturing chain. The control and prevention of biofilms in food-processing plants are of utmost importance. This study explores the efficacy of prospect molecules for counteracting bacterial mechanisms leading to biofilm formation. Read More

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[Neurotropic bovine astrovirus-associated encephalitis: An underdiagnosed disease in South America?]

Rev Argent Microbiol 2021 Jun 17. Epub 2021 Jun 17.

Plataforma de Investigación en Salud Animal, Instituto Nacional de Investigación Agropecuaria (INIA), La Estanzuela, Colonia, Uruguay. Electronic address:

We describe a case of neurotropic bovine astrovirus-associated encephalitis in a Jersey dairy cow from the department of San José, Uruguay. This represents the second case of this condition reported in the Southern Hemisphere. The cow was the only one affected in a herd of 70 cows, showing neurological signs with a 2-day clinical course, before dying spontaneously. Read More

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Semi-quantitative food safety risk profile of the Australian red meat industry.

Int J Food Microbiol 2021 Jun 15;353:109294. Epub 2021 Jun 15.

Meat & Livestock Australia, PO Box 1961, North Sydney, NSW 2059, Australia.

In 2017-18, the Australian red meat (beef, sheep and goat species) industry generated more than $AUD 13 billion in export trade alone and is therefore of substantial importance to the Australian GDP. With both relatively high amounts of domestic red meat consumption and dependence on international markets, food safety risk is constantly reassessed so as to maintain a resilient industry sector. The current study aimed to conduct a food safety risk rating for the Australian red meat industry. Read More

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LincRNA-Cox2 regulates IL6/JAK3/STAT3 and NF-κB P65 pathway activation in Listeria monocytogenes-infected RAW264.7 cells.

Int J Med Microbiol 2021 Jun 9;311(5):151515. Epub 2021 Jun 9.

Department of Clinical Laboratory, Northern Jiangsu People' s Hospital, Yangzhou, 225001, China. Electronic address:

Listeria monocytogenes (Lm) can lead to high mortality rates relative to other foodborne pathogens. Lm-induced inflammation is partly characterized by macrophage activation. Long non-coding RNAs (lncRNAs) have important roles in various biological processes. Read More

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Listeria environmental sampling tests are compatible with polymorphic locus sequence typing.

J Food Sci 2021 Jun 19. Epub 2021 Jun 19.

U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, Wyndmoor, Pennsylvania, USA.

Food processors invest significant resources into environmental sampling to detect contamination with potential pathogens, particularly Listeria monocytogenes. To facilitate these efforts, multiple environmental sampling tests (ESTs) have been developed and commercialized that minimize workload, turnaround time, and cost while providing convenient colorimetric detection. For presumptive-positive ESTs, we hypothesized that a relatively minor additional investment could provide, in addition to species confirmation, valuable strain typing data for tracking pathogen spread through a facility, identifying harborage sites, and distinguishing sporadic from persistent or resident contaminants. Read More

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Prevalence of Listeria species and Listeria monocytogenes on Raw Produce Arriving at Frozen Food Manufacturing Facilities.

J Food Prot 2021 Jun 18. Epub 2021 Jun 18.

University of Georgia.

Ubiquity of Listeria monocytogenes in the environment impacts the food industry and presents concerns for frozen food facilities. This study determined the prevalence and numbers of Listeria species and L. monocytogenes on raw produce arriving at frozen food facilities. Read More

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Encapsulation of Purified Pediocin of Pediococcus Pentosaceus into Liposome Based Nanovesicles and its Antilisterial Effect.

Protein Pept Lett 2021 Jun 17. Epub 2021 Jun 17.

Dept. of Biomedical Sciences. School of BioSciences and Technology, SBST; Vellore Institute of Technology, Vellore 632 014, Tamil Nadu, India.

Aims: To encapsulate a purified bacteriocin into nanovesicles and check its antibacterial effect Background: Although the use of nano-encapsulated bacteriocins in food matrices is poorly reported, encapsulated nisin can reduce L. monocytogenes counts in whole and skimmed milk and soft cheese.

Objective: The present study deals with the extraction and purification of a bacteriocin from an isolated strain Pediococcus pentosaceus KC692718. Read More

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[Genomic characterization of food-borne Listeria monocytogenes isolates from Nanshan district of Shenzhen during 2009-2019].

Zhonghua Yu Fang Yi Xue Za Zhi 2021 Jun;55(6):774-779

Shenzhen Nanshan Center for Disease Control and Prevention, The Department of Microbiological Laboratory, Shenzhen 518054, China.

The study aims to investigate the characteristic baseline information about genetic lineages, drug-resistance genes, virulence genes and evolutionary relationships of food-borne Listeria monocytogenes (Lm) isolates from Nanshan district of Shenzhen. The whole genomes of 46 Lm isolates during 2009-2019 were extracted and sequenced (Illumina PE-150, 100×). The CLC Genomics Workbench 12. Read More

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Effect of essential oil and potassium sorbate on inoculated , microbial and chemical quality of raw trout fillet during refrigerator storage.

Food Sci Nutr 2021 Jun 26;9(6):3015-3025. Epub 2021 Mar 26.

Department of Fisheries Faculty of Natural Resources University of Tehran Karaj Iran.

Human listeriosis is predominantly associated with contaminated food consumption, including seafood, shrimp, and RTE foods. is a foodborne pathogen that is mainly found in freshwater, seawater, and fish mucus. Seafood contamination can occur during food processing. Read More

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Assessment of (-) epicatechin as natural additive for improving safety and functionality in fresh "Piel de Sapo" melon juice.

Food Sci Nutr 2021 Jun 30;9(6):2925-2935. Epub 2021 Mar 30.

Department of Food Hygiene and Food Technology University of León León Spain.

Epicatechin (EC) is a very abundant flavonoid in vegetable tissues that presents high antioxidant activity in living systems. The minimum inhibitory concentration (MIC) of (-)EC was determined in three species of bacteria commonly associated with foodborne illness of plant origin: (.) , (. Read More

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Autophagy in Immunity: Conserved Antimicrobial Functions in Insect Defenses.

Front Immunol 2021 31;12:667664. Epub 2021 May 31.

Department of Applied Biology, Institute of Environmentally-Friendly Agriculture (IEFA), College of Agriculture and Life Sciences, Chonnam National University, Gwangju, South Korea.

The yellow mealworm beetle () has been exploited as an experimental model to unravel the intricacies of cellular and humoral immunity against pathogenic infections. Studies on this insect model have provided valuable insights into the phenotypic plasticity of immune defenses against parasites and pathogens. It has thus been possible to characterize the hemocoelic defenses of that rely on the recognition of non-self-components of pathogens by pattern recognition receptors (PRRs). Read More

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A rapid way of formulation development revealing potential synergic effects on numerous antimicrobial combinations against foodborne pathogens.

Microb Pathog 2021 Jun 12;158:105047. Epub 2021 Jun 12.

Research Laboratories in Sciences Applied to Food, Canadian Irradiation Center, INRS-Institut Armand-Frappier, Institute of Nutraceutical and Functional, Laval, Quebec, Canada. Electronic address:

The interactions between various essential oils (EOs) were evaluated for the development of antimicrobial formulations. A full factorial design was applied for testing eight EOs (Mustard, Thyme, Garlic, Oregano, Chinese cinnamon, Cinnamon bark, Red bergamot, Winter savory) against nine bacteria (E.coli O157:H7 RM1239, E. Read More

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De novo design of a pH-triggered self-assembled β-hairpin nanopeptide with the dual biological functions for antibacterial and entrapment.

J Nanobiotechnology 2021 Jun 14;19(1):183. Epub 2021 Jun 14.

Laboratory of Molecular Nutrition and Immunity, The Institute of Animal Nutrition, Northeast Agricultural University, Harbin, People's Republic of China.

Background: Acid-tolerant enteric pathogens can evade small intestinal acid barriers, colonize and infect the intestinal tract. However, broad-spectrum antibiotics are not the best therapeutic strategy because of the disruption of intestinal flora caused by its indiscriminate antimicrobial activity against beneficial and harmful bacteria. So that is what inspired us to combine pH regulation with nanotechnology to develop a pH-triggered site-targeted antimicrobial peptide with entrapping function. Read More

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Combination of ozone and ultrasonic-assisted aerosolization sanitizer as a sanitizing process to disinfect fresh-cut lettuce.

Ultrason Sonochem 2021 Jun 6;76:105622. Epub 2021 Jun 6.

Shijiashike Co., Ltd., Liaoyang 111000, China.

Reduction of sanitizer dosage and development of non-immersion disinfection methods have become major focuses of research. Here, we examined the disinfection efficacy of combining gaseous ozone (4 and 8 ppm) with aerosolized oxidizing sanitizer [sodium hypochlorite (SH, 100 and 200 ppm)] and aerosolized organic acid [acetic acid (AA, 1% and 2%) and lactic acid (LA, 1% and 2%)]. Notably, 1% AA and 4 ppm gaseous ozone were ineffective for disinfecting Salmonella Typhimurium, and treatment with 1% AA + 8 ppm ozone caused browning of lettuce leaves and stimulated increases in aerobic mesophilic count (AMC), aerobic psychrotrophic count (APC), S. Read More

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Ensuring safety and improving keeping quality of meatballs by addition of sesame oil and sesamol as natural antimicrobial and antioxidant agents.

Food Microbiol 2021 Oct 19;99:103834. Epub 2021 May 19.

Department of Food Hygiene and Control, Faculty of Veterinary Medicine, Mansoura University, Mansoura, 35516, Egypt.

The antioxidant and antimicrobial effect of sesame oil (10, 30, and 50 g/kg) and sesamol (0.1, 0.3, and 0. Read More

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October 2021

Lactic fermentation of cooked, comminuted mussel, Perna canaliculus.

Food Microbiol 2021 Oct 14;99:103829. Epub 2021 May 14.

School of Science, AUT University, Auckland, New Zealand.

The endogenous microflora of mussels, filter feeders, can include pathogens with resulting food safety concerns. The aim was to develop a cook-then-ferment technology to extend shelf life and safety of a ready-to-eat mussels. Only after cooking to destroy the mussel's endogenous microflora could an edible product be made as determined by pH decline after fermentation and the fate of common pathogens. Read More

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October 2021

Physical and antibacterial properties of bacterial cellulose films supplemented with cell-free supernatant enterocin-producing Enterococcus faecium TJUQ1.

Food Microbiol 2021 Oct 14;99:103828. Epub 2021 May 14.

School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, PR China. Electronic address:

In this study, a composite film was prepared with bacterial cellulose (BC) of Gluconacetobacter xylinus and cell-free supernatant (CFS) of Enterococcus faecium TJUQ1, which was named BC-E. The optimum conditions for the preparation of the composite film with a minimal antibacterial activity were the soak of BC in 80 AU/mL CFS for 6 h. By scanning electron microscope observation, the surface network structure of BC-E was denser than that of BC. Read More

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October 2021

Effect οf οxygen availability and pH οn adaptive acid tolerance response of immobilized Listeria monocytogenes in structured growth media.

Food Microbiol 2021 Oct 18;99:103826. Epub 2021 May 18.

Laboratory of Food Quality Control and Hygiene, Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 118 55, Athens, Greece. Electronic address:

The aim of the present study was to evaluate the effect of oxygen availability (aerobic, hypoxic and anoxic conditions) and sub-optimal pH (6.2 and 5.5) in a structured medium (10% w/V gelatin) on the growth of two immobilized L. Read More

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October 2021

Quantitative risk assessment of Listeria monocytogenes in ready-to-eat (RTE) cooked meat products sliced at retail stores in Greece.

Food Microbiol 2021 Oct 9;99:103800. Epub 2021 Apr 9.

Laboratory of Food Microbiology and Hygiene, Department of Food Science and Technology, School of Agriculture, Faculty of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece. Electronic address:

A quantitative microbial risk assessment (QMRA) model predicting the listeriosis risk related to the consumption of Ready- To- Eat (RTE) cooked meat products sliced at retail stores in Greece was developed. The probability of illness per serving assessed for 87 products available in the Greek market was found highly related to the nitrite concentration; products having a lower concentration showed a higher risk per serving. The predicted 95 percentiles of the annual listeriosis cases totaled 33 of which 13 cases were <65 years old and 20 cases ≥65 years old. Read More

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October 2021

Genomic diversity and characterization of Listeria monocytogenes from dry-cured ham processing plants.

Food Microbiol 2021 Oct 11;99:103779. Epub 2021 Mar 11.

Departamento Tecnología de Alimentos, INIA, Carretera de La Coruña Km 7, 28040, Madrid, Spain. Electronic address:

Genomic diversity of Listeria monocytogenes isolates from the deboning and slicing areas of three dry-cured ham processing plants was analysed. L. monocytogenes was detected in 58 out of 491 samples from the environment and equipment surfaces, all from the deboning area, with differences in prevalence among facilities. Read More

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October 2021

Isolation and characterization of Listeria monocytogenes among women attending Jimma University medical center, Southwest Ethiopia.

BMC Infect Dis 2021 Jun 12;21(1):564. Epub 2021 Jun 12.

School of Medical Laboratory Sciences, Jimma University, Jimma, Ethiopia.

Background: Listeria monocytogenes (LM) has come to be a major public health issue of at-risk groups, causing high morbidity and mortality. Despite this data, studies are very limited in developing countries like Ethiopia. Thus, we aimed to isolate and characterize LM in terms of antibiogram and biofilm formation among pregnant women with fever, women with a history of spontaneous abortion, women with a history of fetal loss, and women with preterm delivery at Jimma University Medical Center (JUMC), southwest Ethiopia. Read More

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Bioactive compounds and antibacterial activities in crystallized honey liquefied with ultrasound.

Ultrason Sonochem 2021 Jun 4;76:105619. Epub 2021 Jun 4.

Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Av. Rancho Universitario s/n Km.1 C.P. 43760, Tulancingo, Hgo, Mexico. Electronic address:

The effect of ultrasound on the crystal size, phenols, flavonoids, Maillard products and antibacterial activity of crystallized honeys was studied. Three multifloral honeys (M), one monofloral (MO) and one honeydew (HD) honey were used. Ultrasound was performed at 42 kHz for different times (0, 5, 10 and 15 min). Read More

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Structural basis of ABCF-mediated resistance to pleuromutilin, lincosamide, and streptogramin A antibiotics in Gram-positive pathogens.

Nat Commun 2021 06 11;12(1):3577. Epub 2021 Jun 11.

Institute for Biochemistry and Molecular Biology, University of Hamburg, Hamburg, Germany.

Target protection proteins confer resistance to the host organism by directly binding to the antibiotic target. One class of such proteins are the antibiotic resistance (ARE) ATP-binding cassette (ABC) proteins of the F-subtype (ARE-ABCFs), which are widely distributed throughout Gram-positive bacteria and bind the ribosome to alleviate translational inhibition from antibiotics that target the large ribosomal subunit. Here, we present single-particle cryo-EM structures of ARE-ABCF-ribosome complexes from three Gram-positive pathogens: Enterococcus faecalis LsaA, Staphylococcus haemolyticus VgaA and Listeria monocytogenes VgaL. Read More

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Predicting the effect of salt on heat tolerance of Listeria monocytogenes in meat and fish products.

Int J Food Microbiol 2021 Aug 1;352:109265. Epub 2021 Jun 1.

The National Food Institute, Technical University of Denmark, Division for Microbiology and Production, Kemitorvet, Building 202, DK-2800 Kgs. Lyngby, Denmark.

Listeria monocytogenes is a potentially fatal foodborne pathogen that can be found in various ready-to-eat (RTE) products. It tolerates adverse conditions such as high salt concentrations and refrigerated storage, thus, the elimination of the pathogen in food processing often relies on heat processing. The objective of this study was to create a model to predict the effect of salt on heat tolerance of L. Read More

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Function and distribution of the conjugative plasmid pLM1686 in foodborne Listeria monocytogenes in China.

Int J Food Microbiol 2021 Aug 30;352:109261. Epub 2021 May 30.

State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention, Beijing 102206, China; Institute of Pathogenic Biology, Hengyang Medical College, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang 421001, China. Electronic address:

Listeria monocytogenes, a fatal foodborne pathogen has the extraordinary capacity to survive in harsh conditions and is a potential threat to public health. A novel 91 kb plasmid pLM1686 was found in the prevalent L. monocytogenes sequence type (ST) 87 strain in China. Read More

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