TY - JOUR. T1 - Interspecies interaction and effect of co-contaminants in an anaerobic dichloromethane-degrading culture. AU - Trueba-Santiso, Alba. AU - Fernández-Verdejo, David. AU - Marco-Rius, Irene. AU - Soder-Walz, Jesica M.. AU - Casabella, Oriol. AU - Vicent, Teresa. AU - Marco-Urrea, Ernest. N1 - Copyright © 2019 Elsevier Ltd. All rights reserved.. PY - 2020/2/1. Y1 - 2020/2/1. N2 - An anaerobic stable mixed culture dominated by bacteria belonging to the genera Dehalobacterium, Acetobacterium, Desulfovibrio, and Wolinella was used as a model to study the microbial interactions during DCM degradation. Physiological studies indicated that DCM was degraded in this mixed culture at least in a three-step process: i) fermentation of DCM to acetate and formate, ii) formate oxidation to CO2 and H-2, and iii) H-2/GO(2) reductive acetogenesis. The 16S rRNA gene sequencing of cultures enriched with formate or H-2 showed that Desulfovibrio was the dominant population followed by Acetobacterium, ...
The study of biofilm function, structure and microbial interactions might help to improve our understanding of biofilm wastewater treatment processes. However, few reports specifically address the influence of interactions within multispecies biofilms on microbial activity and biofilm composition. Thus, the relationship between biofilm formation, denitrification activity, phosphorus removal and the composition of extracellular polymeric substances (EPS), exopolysaccharides and the bacterial community was investigated using biofilms of denitrifying and phosphorus removing strains Comamonas denitrificans 110, Brachymonas denitrificans B79, Aeromonas hydrophila L6 and Acinetobacter calcoaceticus ATCC23055. Denitrification activity within the biofilms generally increased with the amount of biofilm while phosphorus removal depended on bacterial growth rate. Synergistic effects of co-growth on denitrification (B. denitrificans B79 and A. hydrophila L6) and phosphorus removal (C. denitrificans 110 with ...
Vocabulary for Microbial Interactions - Exam 3 - Microbiology. Find, create, and access Microbiology, flashcards with Course Hero.
Microbial interactions have a key role in global geochemical cycles. Although we possess significant knowledge about the general biochemical processes occurring in microbial communities, we are often unable to decipher key functions of individual microorganisms within the environment in part owing to the inability to cultivate or study them in isolation. Here, we circumvent this shortcoming through the use of single-cell genome sequencing and a novel low-input metatranscriptomics protocol to reveal the intricate metabolic capabilities and microbial interactions of an alkane-degrading methanogenic community. This methanogenic consortium oxidizes saturated hydrocarbons under anoxic conditions through a thus-far-uncharacterized biochemical process. The genome sequence of a dominant bacterial member of this community, belonging to the genus Smithella, was sequenced and served as the basis for subsequent analysis through metabolic reconstruction. Metatranscriptomic data generated from less than 500 ...
We describe nasopharyngeal colonization of children with S. pneumoniae, H. influenzae, M. catarrhalis, and S. aureus alone or in combination during URI. Our models predicting S. pneumoniae colonization indicated that H. influenzae is negatively associated with S. pneumoniae. However, when H. influenzae was present with M. catarrhalis, odds of S. pneumoniae colonization increased by ,2-fold. Models predicting H. influenzae colonization indicated a negative association with S. pneumoniae, M. catarrhalis, and S. aureus. Competitive interactions between bacteria are complex after URI and may shift from negative to positive when additional bacteria species are present. Modeling S. pneumoniae, H. influenzae, and M. catarrhalis colonization separately showed that gender, race, and daycare were associated with colonization by H. influenzae, but not with colonization by either S. pneumoniae or M. catarrhalis.. Jacoby et al. used a multivariate random effects model to examine S. pneumoniae colonization in ...
Background: Chronic Obstructive Pulmonary Disease (COPD) exacerbations caused by bacterial infections account for more than 50% of all exacerbation episodes, with Haemophilus influenzae as the most frequently isolated pathogen. The role of antibiotics in treating COPD bacterial exacerbations remains unclear. Objective: The current analysis evaluates the interaction of H. influenzaes with other pathogens while controlling for the use of antibiotics. Methods: Data were from a longitudinal study of COPD patients conducted at a VA medical center from 1994-2010. Analysis was restricted to sputum samples collected over the course of one year in a total of 130 patients. Presence of Moraxella catarrhalis, Streptococcus pneumoniae, Staphylococcus aureus, Pseudomonas aeruginosa, and antibiotic use within the past 21 days were examined to predict the colonization by H. influenzae using repeated measures logistic regression. Results: The cohort was primarily male (96.9), white (89.9%), with an average age of 66.7
The interactions that take place between the species of microbes living in the gastrointestinal system often have large and unpredicted effects on health, according to new work from a team led by Carnegies Will Ludington. Working with fruit flies, the team found that the interactions that take place between the microbial populations are as important to a flys physiology as which individual species are present.
Analysis of the global genetic requirements and gene expression changes in E. coli in the presence of a simple microbiome revealed pairwise and higher-order interactions, and underlying molecular mechanisms.
Bacteria are programmed using synthetic biology to release gas to report when they exchange DNA through horizontal gene transfer, the process by which organisms share genetic traits without a parent-to-child relationship.
A DNA extraction that comprises the DNA of all available taxa in an ecosystem is an essential step in population analysis, especially for next generation sequencing applications. Many nanoparticles as well as naturally occurring clay minerals contain charged surfaces or edges that capture negatively charged DNA molecules after cell lysis within DNA extraction. Depending on the methodology of DNA extraction, this phenomenon causes a shift in detection of microbial taxa in ecosystems and a possible misinterpretation of microbial interactions. With the aim to describe microbial interactions and the bio-geo-chemical reactions during a clay alteration experiment, several methods for the detection of a high number of microbial taxa were examined in this study. Altogether, 13 different methods of commercially available DNA extraction kits provided by seven companies as well as the classical phenol-chloroform DNA extraction were compared. The amount and the quality of nucleic acid extracts were ...
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Microbes inhabit the worlds oceans, deserts, lakes, soils, and atmosphere, and play a vital role in the Earths biogeochemical cycles. As humans, we harbor a diverse microbial flora estimated to outnumber our own human cells. During this course, we will explore this microbial world by investigating the structure, physiology, genetics, and evolution of microorganisms with a focus on bacteria, but including discussions of archaea, viruses, and microbial eukaryotes. The goal of the course is to gain an understanding of the unique properties of microbes that enable their persistence and diversification. We will also pay special attention to microbial interactions with eukaryotic organisms, by studying both host and microbe contributions to virulence, mutualism, and symbiotic relationships. Laboratory exercises will include explorations of microbial functions and diversity in a variety of contexts using both classical and molecular approaches. Three hours of lecture, three hours of laboratory and ...
Reed Hutchinson/UCLA Senior author Elaine Hsiao says researchers hope to build on their current study to learn whether microbial interactions with...
Commentary: Microbial Small Talk: Volatiles in Fungal-Bacterial InteractionsStéphane Hacquard*Department of Plant Microbe Interactions, Max Planck Institute for Plant Breeding Research, 50829 Cologne, Germany*Correspondence :Stéphane [email protected]: microbial interactions, microbiome, volatile organic compounds, soil microbiology A commentary on:Microbial Small Talk: Volatiles in Fungal-Bacterial Interactionsby Ruth Schmidt, Desalegn W. Etalo, Victor de Jager, Saskia Gerards, Hans Zweers, Wietse de Boer, and Paolina Garbeva. Front. microbiol. (2016), 6:1495Since the origin of fungi, estimated between 760 million and 1.06 billion years ago (Lücking et al., 2009), fungi and bacteria have been interacting with each other and have colonized almost all explored niches on earth, including nutrient poor environments. Although these two microbial groups often interact in nature and form complex microbial consortia, fungi and bacteria have been mostly studied separately (Frey-Klett et
Biochemistry, Biotechnology, Microbiology, Bacteriology, Soil biology, Soil chemistry, Water quality, Microbial interactions, Microbial diversity, Microbial ecology, Greenhouse ...
The ability of bacteria to influence organisms that they associate with via metabolite production is one of the hallmarks of microbial interactions. One metabolite of interest is the metabolic poison cyanide. Production of this metabolite is an unique characteristic of certain bacteria that inhabit a wide array of habitats ranging from the human body to the rhizosphere. This review focuses on four ...
This research focuses on the antimicrobial activity of the mouse chemokine CCL28. In addition to their well characterized chemotactic activity, many chemokines have been shown to be antimicrobial in vitro, including the mucosally expressed chemokine CCL28. I have investigated the primary sequence features required for antimicrobial activity, salt sensitive nature of killing/binding mechanism, and in vivo microbial interactions of CCL28. Through the use of protein mutation and expression techniques, I have shown that the holoprotein (108 amino acids) is necessary for full antimicrobial activity of CCL28. Furthermore, the C terminal region of CCL28 is essential for microbial killing as an almost complete loss of antimicrobial activity is seen following the removal of the C terminal 24 amino acids. The positively charged amino acids of the C-terminus directly contributed to the antimicrobial activity of CCL28. These experiments are the first to investigate the role of primary structure on the killing
The Department of Microbiology and Immunology at UNC - Chapel Hill represents a dynamic and exciting blend of disciplines and technology. Research and training are largely focused in the areas of immunology, virology, and microbial interactions, but the questions and strategies are broadly based in molecular biology, cell biology, biochemistry, genetics and genomics. Besides offering a comprehensive set of courses and seminar/tutorials for graduate students, the department provides instruction in microbiology and immunology to students enrolled in the School of Medicine and Dentistry, as well as undergraduate students who seek admission into degree programs offered in the School of Nursing and Pharmacy.. Please use the links above for further information about our department.. ...
They are particularly important in degraded or less fertile You can turn off the use of cookies at anytime by changing your specific browser settings. Microbial Interactions. Chopper deal: Rajya Sabha passes motion for a JPC ... online email reading jobs without investment. Rohde - Bio 2420. Algae eg. soils. Diseases (assorted) Chapter 6. This privacy policy is subject to change without notice and was last updated on February-8-2013.If you have any questions feel free to contact me directly here: [email protected] described in the next topics. Typically, 50% of a soil volume will be mineral particles, 25% air filled â ¦ microbes. Chapter 12. Lecture 17: Microbial Transformations of Nitrogen, Phosphorus and Sulphur. Sachin Tendulkars return to form for India is a w... 27 FEB, 2013, 08.33PM IST, RACHITA PRASAD,ET BUREAU, 20 killed at Sealdah market fire in Kolkata. BGA, Yellow Green Algae, Golden Iam a sudent studying BTECH in a deemed university,I am interested in writing articles ...
Click here to read the summary and the complete report: Summary 1.Warmer and drier conditions associated with ongoing climate change will increase abiotic stress for plants and mycorrhizal fungi in drylands worldwide, thereby potentially reducing vegetation cover and productivity and increasing the risk of land degradation and desertification. Rhizosphere microbial interactions and feedbacks are critical…
Meet Global Microbiologists from USA (America), Europe, Middle East, Asia Pacific, Canada, Japan, and Australia at Microbial Interactions Conferences, Microbiology Conferences and Clinical, Molecular and Applied Microbiology Conferences during 2020-2021.
The McIntosh Research Laboratory at the University of Floridas Child Health Research Institute, seeks a highly motivated Postdoctoral Research Associate to join a team exploring the roles of novel infectious agents in diseases of unknown etiology or emerging epidemiology.. Research emphasis is on detection and characterization of potential pathogens and investigating host microbial interactions to reveal underlying mechanisms of disease as well as targets for diagnosis or intervention. Broad areas of study include microbial, in particular viral, discovery in the context of clinical diseases of unknown etiology, at the human animal/vector interface, and in the contexts of immunocompromise or cancer.. Specialized expertise is sought in three or more of the following: Molecular Biology, LINUX/UNIX and Python scripting, MySQL, metagenomics, transcriptomics, epigenetics, statistics, and/or SNP analysis of human genomes in the context of cancer.. • Designing and performing experiments using a ...
Durham, NC - Alejandro Aballay, PhD, Professor in the Department of Molecular Genetics and Microbiology and Director of the Center for Host Microbial Interactions at Duke University, will be receiving an NIH MERIT Award from NIGMS for his research project on the role of the nervous system in controlling immunity in the model host C. elegans.. Dr. Aballays project will be a multidisciplinary research program regarding the study of neural circuits involved in the control of stress responses and innate immunity. Recent studies from his laboratory indicate that different immune mechanisms are controlled at the organismal level by the nervous system. His laboratory has demonstrated that specific neurons suppress innate immunity in the intestinal cells of the nematode Caenorhabditis elegans, in part by down-modulating a mitogen-activated protein kinase signaling pathway similar to the mammalian p38 MAPK pathway that is highly conserved across metazoans. They found that NPR-1, a G-protein coupled ...
A program that focuses on the scientific study of the genetics of viruses, infectious agents, organelles, nuclear genomes, eubacteria, archaebacteria, and eukaryotic organisms. Includes instruction in molecular genetics and evolution, parasitic and symbiotic interaction at the genetic level, epigenetic phenomena, microbial interactions, and genomics.
A model for the functioning of an agricultural system, with all inputs and outputs. An ecosystem may be as small as a set of microbial interactions that take place on the surface of roots, or as large as the globe. An agroecosystem may be at the ...
This book addresses Phyto-Microbiome Mediated Stress Regulation. It offers a compendium of plant and microbial interactions at the level of multitrophic interactions and identifies gaps between future demand and present research on plant stress conditions.
The December issue of MicrobiologyOpen can be viewed online now! MicrobiologyOpen is a broad scope, peer reviewed journal delivering rapid decisions and fast publication of microbial science. The journal gives priority to reports of quality research, pure or applied, that further our understanding of microbial interactions and microbial processes. Editor-in-Chief, Pierre Cornelis has highlighted the papers…
Despite the fact that roots are the organs most subject to microbial interactions, very little is known about the response of roots to microbe-associated ...
Dynamic population models are based on the Verhulsts equation (logisitic equation), where the classic Malthusian growth rate is damped by intraspecific competition terms. Mainstream population models for mutualism are modifications of the logistic equation with additional terms to account for the benefits produced by the interspecies interactions. These models have shortcomings as the population divergence under some conditions (Mays equations) or a mathematical complexity that difficults their analytical treatment (Wrights type II models). In this work, we introduce a model for the population dynamics in mutualism inspired by the logistic equation but cured of divergences. The model is also mathematically more simple than the type II. We use numerical simulations to study the model stability in more general interaction scenarios. Despite its simplicity, our results suggest that the model dynamics are rich and may be used to gain further insights in the dynamics of mutualistic interactions.
TY - JOUR. T1 - Phase transitions in multiplicative competitive processes. AU - Shimazaki, Hideaki. AU - Niebur, Ernst. PY - 2005/7. Y1 - 2005/7. N2 - We introduce a discrete multiplicative process as a generic model of competition. Players with different abilities successively join the game and compete for finite resources. Emergence of dominant players and evolutionary development occur as a phase transition. The competitive dynamics underlying this transition is understood from a formal analogy to statistical mechanics. The theory is applicable to bacterial competition, predicting novel population dynamics near criticality.. AB - We introduce a discrete multiplicative process as a generic model of competition. Players with different abilities successively join the game and compete for finite resources. Emergence of dominant players and evolutionary development occur as a phase transition. The competitive dynamics underlying this transition is understood from a formal analogy to statistical ...
Yeast cells that share food have a survival edge over their freeloading neighbors - particularly when there is bacterial competition.