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Salmonella enterica Serovar Typhimurium Strategies for Host Adaptation

Christopher J. Anderson, Melissa M. Kendall
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research

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Source: Letters in Applied Microbiology - Category: Microbiology Authors: Tags: Original Article Source Type: research
In this study, a sseK1 deletion mutant of S. enteritidis was constructed and its biological characteristics were examined. It was found that the sseK1 deletion mutant did not affect the growth, adherence and invasion of Salmonella enteritidis when compared to the wild-type S. enteritidis. However, the mutant showed decreased formation of biofilm and significantly reduced intracellular survival of bacteria in activated mouse peritoneal macrophages, as well as showed reduced pathogenicity to a murine model by increasing the lethal dose 50% (LD50) value and decreasing the proliferation ratio of bacteria in vivo. Taken togethe...
Source: Microbial Pathogenesis - Category: Infectious Diseases Source Type: research
The objective of this study was to evaluate the effects of the natural safety high antimicrobial compounds on egg yolk protein structure and function. Three different concentrations have been evaluated from: trans-cinnamaldehyde, thymol, menthol or vanillin on egg yolk by measuring the antimicrobial activity, Fourier transform infrared (FT-IR), secondary protein structure, surface hydrophobicity, zeta-potential, foaming and color properties. Results showed that by mixing yolk with 0.1% of thymol and trans-cinnamaldehyde, the antimicrobial activity increased significantly (P < 0.05) to 92.18 ± 3.26; 98.95 &p...
Source: Food Hydrocolloids - Category: Food Science Source Type: research
Publication date: July 2018 Source:Food Control, Volume 89 Author(s): Siyuan Zhou, Changying Hu, Guohua Zhao, LinShu Liu, Shiowshuh Sheen, Kit L. Yam Chlorine dioxide (ClO2) is an antimicrobial compound used in fresh produce sanitation. Compared to its aqueous form, gaseous ClO2 has an enhanced antimicrobial effect. This research proposed a novel generating method of ClO2(g) that utilized carbon dioxide and moisture naturally released from tomato during respiration to react with sodium chlorite for ClO2(g) generation. The results showed that the generated ClO2(g) not only effectively reduced the surface-inoculated Salmone...
Source: Food Control - Category: Food Science Source Type: research
In this study, we tested farm vegetables and agricultural water for the presence of foodborne pathogens, and evaluated farming practices of vegetable farms in Rwanda. Farm vegetable samples were found to be contaminated with foodborne pathogens at considerably high rate (overall 15/99 = 15%). Specifically, the prevalence of pathogens in farm vegetables varied from 1.0% (1/99) for Listeria monocytogenes, 3.0% (3/99) for thermo-tolerant Campylobacter spp., 5.1% (5/99) for Salmonella spp. to 6.1% (6/99) pathogenic Escherichia coli. In agricultural water from rivers, lakes, lagoons, ground and marshlands, prevalence of DNA...
Source: Food Control - Category: Food Science Source Type: research
A. Patients with decreased B cell function and early complement deficiencies are at increased risk for infection by encapsulated organisms such as Streptococcus pneumoniae, Pseudomonas aeruginosa, Haemophilus influenzae type B, Neisseria meningitidis, Escherichia coli, Salmonella, Klebsiella pneumoniae, and Group B Streptococcus. B. Patients with decreased T cells or granulocytes are at increased risk for infection by fungi and parasites such as... b and t cells desfunction
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums
Publication date: 1 June 2018 Source:Biosensors and Bioelectronics, Volume 107 Author(s): Aung Thiha, Fatimah Ibrahim, Shalini Muniandy, Ignatius Julian Dinshaw, Swe Jyan Teh, Kwai Lin Thong, Bey Fen Leo, Marc Madou Nanowire sensors offer great potential as highly sensitive electrochemical and electronic biosensors because of their small size, high aspect ratios, and electronic properties. Nevertheless, the available methods to fabricate carbon nanowires in a controlled manner remain limited to expensive techniques. This paper presents a simple fabrication technique for sub-100 nm suspended carbon nanowire sensors by in...
Source: Biosensors and Bioelectronics - Category: Biotechnology Source Type: research
In this study, two Salmonella enterica serovars (Hartford and Cubana) applied, at multiple inoculation levels, were evaluated for survival and growth on alfalfa sprouts and Swiss chard microgreens using the most probable number (MPN) method. Various abiotic factors were also examined for their effects on Salmonella survival and growth on sprouts and microgreens. Community level physiological profiles (CLPP) of sprout/microgreen rhizospheres with different levels of S. enterica inoculation at different growth stage were characterized with Biolog EcoPlates. In the seed contamination group, the ability of S. enterica to grow ...
Source: Applied and Environmental Microbiology - Category: Microbiology Authors: Tags: Appl Environ Microbiol Source Type: research
Conclusions Analysis of MIC supplies important information concerning microbial sensitivity to active substances, mainly in terms of limiting concentrations causing mortality or vitality of the tested species, which is essential when selecting appropriate antibiotic therapy.
Source: Electronic Journal of Biotechnology - Category: Biotechnology Source Type: research
Smokehouse Pet Products, Inc. of Sun Valley, CA is recalling all sizes and package types of dog treats labeled as “ Beefy Munchies, ” because it has the potential to be contaminated with Salmonella. Salmonella can affect animals eating the products and there is risk to humans from handling contaminated pet products, especially if they have not thoroughly washed their hands after having contact with the products or any surfaces exposed to these products.
Source: Food and Drug Administration - Category: Food Science Source Type: news
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