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https://www.readbyqxmd.com/read/29222621/lifespan-extension-of-caenorhabditis-elegans-by-butyricicoccus-pullicaecorum-and-megasphaera-elsdenii-with-probiotic-potential
#1
Gayeung Kwon, Jiyun Lee, Jong-Ho Koh, Young-Hee Lim
Butyricicoccus pullicaecorum and Megasphaera elsdenii inhabit the human intestine and have probiotic potential. The aim of this study was to evaluate the effects of B. pullicaecorum and M. elsdenii on the lifespan of Caenorhabditis elegans. They significantly (P < 0.05) extended the lifespan of C. elegans compared with Escherichia coli OP50, a standard food for the worm. Analysis of age-related biomarkers such as lipofuscin, body size, and locomotory activity showed that they retarded aging. They all failed to extend the lifespan of daf-12 or dbl-1 loss-of-function C...
December 8, 2017: Current Microbiology
https://www.readbyqxmd.com/read/29221797/evaluation-of-dose-dependent-antimicrobial-activity-of-self-assembled-chitosan-nano-silver-and-chitosan-nano-silver-composite-against-several-pathogens
#2
Foysal Kabir Tareq, Mst Fayzunnesa, Md Shahariar Kabir, Musrat Nuzat
The aim of this investigation to preparation of silver nanoparticles organized chitosan nano polymer, which effective against microbial and pathogens, when apply to liquid medium and edible food products surface, will rescue the growth of microbes. Self-assembly approach used to synthesis of silver nanoparticles and silver nanoparticles organized chitosan nano polymer. Silver nanoparticles and silver nanoparticles organized chitosan nano polymer and film characterized using Ultra-violate visible spectrometer (UV-vis), X-ray diffraction (X-ray), and Scanning electronic microscope (SEM)...
December 5, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29219091/potential-impact-of-climate-change-on-emerging-vector-borne-and-other-infections-in-the-uk
#3
Matthew Baylis
Climate is one of several causes of disease emergence. Although half or more of infectious diseases are affected by climate it appears to be a relatively infrequent cause of human disease emergence. Climate mostly affects diseases caused by pathogens that spend part of their lifecycle outside of the host, exposed to the environment. The most important routes of transmission of climate sensitive diseases are by arthropod (insect and tick) vectors, in water and in food. Given the sensitivity of many diseases to climate, it is very likely that at least some will respond to future climate change...
December 5, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/29217186/biosynthesis-of-silver-nanoparticles-and-polyhydroxybutyrate-nanocomposites-of-interest-in-antimicrobial-applications
#4
J L Castro-Mayorga, F Freitas, M Reis, A Prieto, J M Lagaron
This study deals with the optimization and scaling up of the production of poly(3-hydroxybutyrate), PHB, nanocomposites containing biosynthesized silver nanoparticles (AgNPs) to generate materials with antimicrobial performance. First, a comparative study of the chemical and biological synthesis of AgNPs during the fermentation process of Cupriavidus necator at shake flask-scale was carried out. These experiments demonstrated the inherent capacity of C. necator to reduce the silver salt and produce AgNPs without the need for adding a reducing agent and, that the method of synthesis (with or without reducing agent) affects the dispersion of the AgNPs and their antimicrobial performance...
December 4, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29215793/genetic-history-of-the-african-sahelian-populations
#5
REVIEW
V Černý, I Kulichová, E S Poloni, J M Nunes, L Pereira, A Mayor, A Sanchez-Mazas
From a biogeographic perspective Africa is subdivided into distinct horizontal belts. Human populations living along the Sahel/Savannah belt south of the Sahara Desert have often been overshadowed by extensive studies focusing on other African populations such as hunter-gatherers or Bantu in particular. However, the Sahel together with the savannah bordering it in the south, is a challenging region where people had and still have to cope with harsh climatic conditions and show resilient behaviours. Besides exponentially growing urban populations, several local groups leading various lifestyles and speaking languages belonging to three main linguistic families still live in rural localities across that region today...
December 7, 2017: HLA
https://www.readbyqxmd.com/read/29215770/molecular-ecology-of-listeria-spp-salmonella-escherichia-coli-o157-h7-and-non-o157-shiga-toxin-producing-escherichia-coli-in-pristine-natural-environments-in-northern-colorado
#6
Christina A Ahlstrom, Clyde S Manuel, Henk C Den Bakker, Martin Wiedmann, Kendra K Nightingale
AIMS: Molecular subtyping is commonly used in foodborne disease surveillance and microbial source tracking. There is a knowledge gap regarding the molecular ecology of foodborne pathogens in non-food associated environments. The objective of this study was to isolate and subtype foodborne pathogens from pristine natural environments with minimal anthropogenic inputs. MATERIALS AND RESULTS: Five locations (wilderness areas) in Northern Colorado were sampled during the spring, summer, and fall over a two-year period...
December 7, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29215258/plasma-functionalized-solution-a-potent-antimicrobial-agent-for-biomedical-applications-from-antibacterial-therapeutics-to-biomaterial-surface-engineering
#7
Joo Young Park, Sanghoo Park, Wonho Choe, Hae In Yong, Cheorun Jo, Kijung Kim
Deadly diseases caused by pathogenic bacteria and viruses have increasingly victimized humans; thus, the importance of disinfection has increased in medical settings as well as in food and agricultural industries. Plasma contains multiple bactericidal agents, including reactive species, charged particles, and photons, which can have synergistic effects. In particular, the chemicals formed in aqueous solution during plasma exposure have the potential for high antibacterial activity against various bacterial infections...
December 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29214347/partial-phenotype-conversion-and-differential-trait-response-to-conditions-of-husbandry-in-mice
#8
Julia Brenmoehl, Christina Walz, Marion Spitschak, Elisa Wirthgen, Michael Walz, Martina Langhammer, Armin Tuchscherer, Ronald Naumann, Andreas Hoeflich
Functional genome analysis usually is performed on the level of genotype-phenotype interaction. However, phenotypes also depend on the relations between genomes and environment. In our experimental system, we observed differential response to environmental factors defined by different conditions of husbandry in a semi-barrier unit or in a SPF (specific pathogen free) barrier unit, which resulted in partial reversal of phenotypes previously observed under semi-barrier conditions. To provide an update of basic phenotypes in unselected and randomly mated controls (DUC) and long-term selected DUhTP (Dummerstorf high treadmill performance) mice in the SPF facility, we compared growth parameters, reproductive performance, the accretion of muscle and fat mass, physical activity, and running performance as well as food intake in all experimental groups...
December 6, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/29214107/diet-and-rosacea-the-role-of-dietary-change-in-the-management-of-rosacea
#9
REVIEW
Emma Weiss, Rajani Katta
Dietary change may play a role in the therapy of rosacea. Certain foods and beverages may act as "triggers" for rosacea exacerbations. These may be divided into heat-related, alcohol-related, capsaicin-related, and cinnamaldehyde-related. One potential pathogenic mechanism may be via the activation of transient receptor potential cation channels, which result in neurogenic vasodilatation. Further research is needed on the role of the gut skin connection in rosacea. Epidemiologic studies suggest that patients with rosacea have a higher prevalence of gastrointestinal disease, and one study reported improvement in rosacea following successful treatment of small intestinal bacterial overgrowth...
October 2017: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/29213286/survival-of-five-strains-of-shiga-toxigenic-escherichia-coli-in-a-sausage-fermentation-model-and-subsequent-sensitivity-to-stress-from-gastric-acid-and-intestinal-fluid
#10
Tone Mari Rode, Anette McLeod, Ingrid Måge, Even Heir, Lars Axelsson, Askild L Holck
The ability of foodborne pathogens to exhibit adaptive responses to stressful conditions in foods may enhance their survival when passing through the gastrointestinal system. We aimed to determine whether Escherichia coli surviving stresses encountered during a model dry-fermented sausage (DFS) production process exhibit enhanced tolerance and survival in an in vitro gastrointestinal model. Salami sausage batters spiked with five E. coli isolates, including enterohaemorrhagic E. coli strains isolated from different DFS outbreaks, were fermented in a model DFS process (20°C, 21 days)...
2017: International Journal of Microbiology
https://www.readbyqxmd.com/read/29209498/intensifying-poultry-production-systems-and-the-emergence-of-avian-influenza-in-china-a-one-health-ecohealth-epitome
#11
Marius Gilbert, Xiangming Xiao, Timothy P Robinson
Several kinds of pressure can lead to the emergence of infectious diseases. In the case of zoonoses emerging from livestock, one of the most significant changes that has taken place since the mid twentieth century is what has been termed the "livestock revolution", whereby the stock of food animals, their productivity and their trade has increased rapidly to feed rising and increasingly wealthy and urbanized populations. Further increases are projected in the future in low and middle-income countries. Using avian influenza as an example, we discuss how the emergence of avian influenza H5N1 and H7N9 in China was linked to rapid intensification of the poultry sector taking place in landscapes rich in wetland agriculture and wild waterfowls habitats, providing an extensive interface with the wild reservoir of avian influenza viruses...
2017: Archives of Public Health, Archives Belges de Santé Publique
https://www.readbyqxmd.com/read/29209283/combination-of-microfluidic-loop-mediated-isothermal-amplification-with-gold-nanoparticles-for-rapid-detection-of-salmonella-spp-in-food-samples
#12
Alejandro Garrido-Maestu, Sarah Azinheiro, Joana Carvalho, Sara Abalde-Cela, Enrique Carbó-Argibay, Lorena Diéguez, Marek Piotrowski, Yury V Kolen'ko, Marta Prado
Foodborne diseases are an important cause of morbidity and mortality. According to the World Health Organization, there are 31 main global hazards, which caused in 2010 600 million foodborne illnesses and 420000 deaths. Among them, Salmonella spp. is one of the most important human pathogens, accounting for more than 90000 cases in Europe and even more in the United States per year. In the current study we report the development, and thorough evaluation in food samples, of a microfluidic system combining loop-mediated isothermal amplification with gold nanoparticles (AuNPs)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29208063/unusually-high-illness-severity-and-short-incubation-periods-in-two-foodborne-outbreaks-of-salmonella-heidelberg-infections-with-potential-coincident-staphylococcus-aureus-intoxication
#13
J H Nakao, D Talkington, C A Bopp, J Besser, M L Sanchez, J Guarisco, S L Davidson, C Warner, M G McINTYRE, J P Group, N Comstock, K Xavier, T S Pinsent, J Brown, J M Douglas, G A Gomez, N M Garrett, H A Carleton, B Tolar, M E Wise
We describe the investigation of two temporally coincident illness clusters involving salmonella and Staphylococcus aureus in two states. Cases were defined as gastrointestinal illness following two meal events. Investigators interviewed ill persons. Stool, food and environmental samples underwent pathogen testing. Alabama: Eighty cases were identified. Median time from meal to illness was 5·8 h. Salmonella Heidelberg was identified from 27 of 28 stool specimens tested, and coagulase-positive S. aureus was isolated from three of 16 ill persons...
December 6, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/29205924/genomic-epidemiology-of-the-emerging-pathogen-batrachochytrium-dendrobatidis-from-native-and-invasive-amphibian-species-in-chile
#14
A Valenzuela-Sánchez, S J O'Hanlon, M Alvarado-Rybak, D E Uribe-Rivera, A A Cunningham, M C Fisher, C Soto-Azat
Emerging fungal diseases represent a threat to food security, animal and human health worldwide. Amphibian chytridiomycosis, caused by the fungus Batrachochytrium dendrobatidis (Bd), has been associated with catastrophic and well-documented amphibian population declines and extinctions. For the first time, Bd was cultured from native and non-native wild amphibians in Chile. Phylogenomic analyses revealed that Chilean isolates AVS2, AVS4 and AVS7 group within the global panzootic lineage of Bd (BdGPL) in a single highly supported clade that includes a genotype previously isolated from the United Kingdom...
December 5, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29205390/sustaining-global-agriculture-through-rapid-detection-and-deployment-of-genetic-resistance-to-deadly-crop-diseases
#15
REVIEW
Sambasivam Periyannan
Contents I. II. III. IV. V. VI. VII. VIII. References SUMMARY: Genetically encoded resistance is a major component of crop disease management. Historically, gene loci conferring resistance to pathogens have been identified through classical genetic methods. In recent years, accelerated gene cloning strategies have become available through advances in sequencing, gene capture and strategies for reducing genome complexity. Here, I describe these approaches with key emphasis on the isolation of resistance genes to the cereal crop diseases that are an ongoing threat to global food security...
December 4, 2017: New Phytologist
https://www.readbyqxmd.com/read/29204955/the-gut-feeling-breaking-down-the-role-of-gut-microbiome-in-multiple-sclerosis
#16
REVIEW
Samantha N Freedman, Shailesh K Shahi, Ashutosh K Mangalam
Multiple sclerosis (MS) is a chronic neuroinflammatory disease of the central nervous system with unknown etiology. Recently, the gut microbiota has emerged as a potential factor in the development of MS, with a number of studies having shown that patients with MS exhibit gut dysbiosis. The gut microbiota helps the host remain healthy by regulating various functions, including food metabolism, energy homeostasis, maintenance of the intestinal barrier, inhibition of colonization by pathogenic organisms, and shaping of both mucosal and systemic immune responses...
December 4, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/29204150/rhizobium-impacts-on-seed-productivity-quality-and-protection-of-pisum-sativum-upon-disease-stress-caused-by-didymella-pinodes-phenotypic-proteomic-and-metabolomic-traits
#17
Nima Ranjbar Sistani, Hans-Peter Kaul, Getinet Desalegn, Stefanie Wienkoop
In field peas, ascochyta blight is one of the most common fungal diseases caused by Didymella pinodes. Despite the high diversity of pea cultivars, only little resistance has been developed until to date, still leading to significant losses in grain yield. Rhizobia as plant growth promoting endosymbionts are the main partners for establishment of symbiosis with pea plants. The key role of Rhizobium as an effective nitrogen source for legumes seed quality and quantity improvement is in line with sustainable agriculture and food security programs...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29203054/on-the-search-to-elucidate-the-role-of-the-microbiota-in-the-genesis-of-cancer-the-cases-of-gastrointestinal-and-cervical-cancer
#18
REVIEW
Francisco Avilés-Jiménez, Yu Guogin, Kirvis Torres-Poveda, Vicente Madrid-Marina, Javier Torres
The microbiota that inhabits the human body plays an important role in health and disease, by their fundamental role in food digestion, training of the immune system or protection against pathogen colonization. However, when the equilibrium with its host is altered, some diseases like cancer might be promoted. In this review we describe the information collected in recent studies between the microbiota and its association with cancer. We conducted the review of the relation of microbiome and cancer etiology focusing on the gastrointestinal and cervical cancer...
December 1, 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/29202232/nucleic-acid-biosensor-synthesis-of-an-all-in-one-universal-blocking-linker-rpa-ublrpa-with-a-pna-based-lateral-flow-device-plfd-for-ultra-sensitive-detection-of-food-pathogens
#19
Yuancong Xu, Yujun Wei, Nan Cheng, Kunlun Huang, Weiran Wang, Li Zhang, Wentao Xu, Yunbo Luo
In this study, a whole-course nucleic acid constructed biosensor that combines the all-in-one concepts of the Universal Blocking Linker Recombinase Polymerase Amplification (UBLRPA) and a PNA-based lateral flow device (PLFD) has been developed for the on-site ultra-sensitive detection of food pathogens. Using the pre-amplification UBLRPA principle, a universal linker and C3 space blocker was applied to produce the universal linker single-duplex DNA products. The developed amplification system was employed to realize the conversion from duplex products to a single strand...
December 4, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29202045/adaptation-in-a-fibronectin-binding-autolysin-of-staphylococcus-saprophyticus
#20
Tatum D Mortimer, Douglas S Annis, Mary B O'Neill, Lindsey L Bohr, Tracy M Smith, Hendrik N Poinar, Deane F Mosher, Caitlin S Pepperell
Human-pathogenic bacteria are found in a variety of niches, including free-living, zoonotic, and microbiome environments. Identifying bacterial adaptations that enable invasive disease is an important means of gaining insight into the molecular basis of pathogenesis and understanding pathogen emergence. Staphylococcus saprophyticus, a leading cause of urinary tract infections, can be found in the environment, food, animals, and the human microbiome. We identified a selective sweep in the gene encoding the Aas adhesin, a key virulence factor that binds host fibronectin...
November 2017: MSphere
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