keyword
MENU ▼
Read by QxMD icon Read
search

microbes

keyword
https://www.readbyqxmd.com/read/28918247/erato-polymnioides-a-novel-hg-hyperaccumulator-plant-in-ecuadorian-rainforest-acid-soils-with-potential-of-microbe-associated-phytoremediation
#1
Irene Chamba, Daniel Rosado, Carolina Kalinhoff, Selvaraj Thangaswamy, Aminael Sánchez-Rodríguez, Manuel Jesús Gazquez
Mercury (Hg) accumulation capacity was assessed in three plant species (Axonopus compressus, Erato polymnioides, and Miconia zamorensis) that grow on soils polluted by artisanal small-scale gold mines in the Ecuadorian rainforest. Individuals of three species were collected at two sampling zones: i) an intensive zone (IZ, 4.8 mg Hg kg(-1) of soil) where gold extraction continues to occur, and ii) a natural zone (NZ, 0.19 mg Hg kg(-1) of soil). In addition, the percentage of arbuscular mycorrhizal fungi (AMF) colonization was determined in plant roots and seven fungal morphotypes isolated from rhizospheric soil...
August 30, 2017: Chemosphere
https://www.readbyqxmd.com/read/28917668/gut-microbe-mediated-suppression-of-inflammation-associated-colon-carcinogenesis-by-luminal-histamine-production
#2
Chunxu Gao, Bhanu Priya Ganesh, Zhongcheng Shi, Rajesh Rasik Shah, Robert Fultz, Angela Major, Susan Venable, Monica Lugo, Kathleen Hoch, Xiaowei Chen, Anthony Haag, Timothy C Wang, James Versalovic
Microbiome-mediated suppression of carcinogenesis may open new avenues for identification of therapeutic targets and prevention strategies in oncology. Histidine decarboxylase (HDC) deficiency has been shown to promote inflammation-associated colorectal cancer by accumulation of CD11b(+)Gr-1(+) immature myeloid cells, indicating a potential antitumorigenic effect of histamine. Here, we demonstrate that administration of hdc(+)Lactobacillus reuteri in the gut resulted in luminal hdc gene expression and histamine production in the intestines of Hdc(-/-) mice...
September 6, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28917107/effects-of-coffee-processing-residues-on-anaerobic-microorganisms-and-corresponding-digestion-performance
#3
Juan Pablo Rojas-Sossa, Mariana Murillo-Roos, Lidieth Uribe, Lorena Uribe-Lorio, Terence Marsh, Niels Larsen, Rui Chen, Alberto Miranda, Kattia Solís, Werner Rodriguez, Dana Kirk, Wei Liao
The objective of this study was to delineate the effects of different coffee processing residues on the anaerobic microbes and corresponding digestion performance. The results elucidated that mucilage-rich feed enhanced the accumulation of methanogens, which consequently led to better digestion performance of biogas production. Fifty percent more methane and up to 3 times more net energy (heat and electricity) output were achieved by the digestion of the mucilage-rich feed (M3). The microbial community and statistical analyses further elucidated that different residues in the feed had significant impact on microbial distribution and correspondingly influenced the digestion performance...
August 19, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28916864/sparticle-an-algorithm-for-the-analysis-of-filamentous-microorganisms-in-submerged-cultures
#4
Joost Willemse, Ferhat Büke, Dino van Dissel, Sanne Grevink, Dennis Claessen, Gilles P van Wezel
Streptomycetes are filamentous bacteria that produce a plethora of bioactive natural products and industrial enzymes. Their mycelial lifestyle typically results in high heterogeneity in bioreactors, with morphologies ranging from fragments and open mycelial mats to dense pellets. There is a strong correlation between morphology and production in submerged cultures, with small and open mycelia favouring enzyme production, while most antibiotics are produced mainly in pellets. Here we describe SParticle, a Streptomyces Particle analysis method that combines whole slide imaging with automated image analysis to characterize the morphology of submerged grown Streptomyces cultures...
September 15, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28916545/serologic-evidence-of-gut-driven-systemic-inflammation-in-juvenile-idiopathic-arthritis
#5
Lampros Fotis, Nurmohammad Shaikh, Kevin W Baszis, Charles M Samson, Raffi Lev-Tzion, Anthony R French, Phillip I Tarr
OBJECTIVE: Accumulating evidence links juvenile idiopathic arthritis (JIA) to nonhost factors such as gut microbes. We hypothesize that children with new-onset JIA have increased intestinal bacterial translocation and circulating lipopolysaccharide (LPS). METHODS: We studied systemic treatment-naive patients with JIA [polyarticular JIA, n = 22, oligoarticular JIA, n = 31, and spondyloarthropathies (SpA), n = 16], patients with established inflammatory bowel disease-related arthritis (IBD-RA, n = 11), and 34 healthy controls...
September 15, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28916372/tracking-and-controlling-soft-surface-contamination-in-health-care-settings
#6
Jonathan D Sexton, Amanda M Wilson, Hannah P Sassi, Kelly A Reynolds
BACKGROUND: Study objectives were to track the transfer of microbes on soft surfaces in health care environments and determine the efficiency of an Environmental Protection Agency (EPA)-registered soft surface sanitizer in the health care environment. METHODS: Soft surfaces at 3 health care facilities were sampled for heterotrophic plate count (HPC) bacteria, Staphylococcus spp, Streptococcus pyogenes, and Escherichia coli followed by a tracer study with a virus surrogate seeded onto volunteer hands and commonly touched surfaces...
September 12, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28916358/the-functional-characterization-and-comparison-of-two-single-crd-containing-c-type-lectins-with-novel-and-typical-key-motifs-from-portunus-trituberculatus
#7
Mengmeng Huang, Changkao Mu, Yuehong Wu, Fei Ye, Dan Wang, Cong Sun, Zhengbing Lv, Bingnan Han, Chunlin Wang, Xue-Wei Xu
C-type lectins are a superfamily of Ca(2+)-dependent carbohydrate-recognition proteins, which play crucial roles in innate immunity including nonself-recognition and pathogen elimination. In the present study, two single-CRD containing C-type lectins were identified from swimming crab Portunus trituberculatus (designated as PtCTL-2 and PtCTL-3). The open reading frame (ORF) of PtCTL-2 encoded polypeptides of 485 amino acids with a signal peptide and a single carbohydrate-recognition domain (CRD), while PtCTL-3's ORF encoded polypeptides of 241 amino acids with a coiled-coil region and a single-CRD...
September 12, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28916315/the-effect-of-immune-modulation-of-streptococcus-constellatus-sc10-strain-upon-acinetobactor-baumannii-infection
#8
Abdullah A Alyousef, Israa M S Al-Kadmy
Acinetobacter baumannii is a tiny, plump and rod-shaped Gram-negative coccobacillus, notorious as an opportunistic pathogen, which is now being considered by CDC as a serious public health threat. Preventing colonization may be a better therapeutic choice using microbiota to protect against A. baumannii transmission. Human microbiota not only regulates immune homeostasis as well provides essential health benefits therefore discovering the interface due microbiota in host immune system will allow to recognise novel immuno- or microbe-based therapies...
September 12, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28916161/stable-association-of-a-drosophila-derived-microbiota-with-its-animal-partner-and-the-nutritional-environment-throughout-a-fly-population-s-life-cycle
#9
REVIEW
Mélisandre A Téfit, Benjamin Gillet, Pauline Joncour, Sandrine Hughes, François Leulier
In the past years, the fruit fly Drosophila melanogaster has been extensively used to study the relationship between animals and their associated microbes. Compared to the one of wild populations, the microbiota of laboratory-reared flies is less diverse, and comprises fewer bacterial taxa; nevertheless, the main commensal bacteria found in fly microbiota always belong to the Acetobacteraceae and Lactobacillaceae families. The bacterial communities associated with the fly are environmentally acquired, and the partners engage in a perpetual re-association process...
September 12, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28916149/wavelet-based-tracking-of-bacteria-in-unreconstructed-off-axis-holograms
#10
Zach Marin, J Kent Wallace, Jay Nadeau, Andre Khalil
We propose an automated wavelet-based method of tracking particles in unreconstructed off-axis holograms to provide rough estimates of the presence of motion and particle trajectories in digital holographic microscopy (DHM) time series. The wavelet transform modulus maxima segmentation method is adapted and tailored to extract Airy-like diffraction disks, which represent bacteria, from DHM time series. In this exploratory analysis, the method shows potential for estimating bacterial tracks in low-particle-density time series, based on a preliminary analysis of both living and dead Serratia marcescens, and for rapidly providing a single-bit answer to whether a sample chamber contains living or dead microbes or is empty...
September 12, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28916147/microbial-associates-of-the-southern-mole-cricket-scapteriscus-borellii-are-highly-pathogenic
#11
Sudarshan K Aryal, Derreck Carter-House, Jason E Stajich, Adler R Dillman
We report the isolation and identification of seven bacterial strains and one fungal strain from dead and diseased Scapteriscus borellii mole crickets collected from a golf course in southern California. Using 16S and 18S rRNA gene sequence analysis we identified the microbes as Serratia marcescens (red), S. marcescens (white), S. marcescens (purple), Achromobacter xylosoxidans, Chryseobacterium sp., Ochrobactrum anthropi, Tsukamurella tryosinosolvens, and Beauveria bassiana. We performed a dose response curve for each of these cricket-associated microbial strains (except T...
September 12, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28915953/syntrophic-imbalance-and-the-etiology-of-bacterial-endoparasitism-diseases
#12
James F White
This article outlines the proposed 'syntrophic imbalance hypothesis' for etiology of bacterial endoparasitism diseases. This hypothesis involves microbes (archaea and bacteria) that exist in human body biofilms in syntrophic associations, where bacteria ferment nutrients to produce short chain fatty acids (SCFAs) that are used by methanogenic archaeons to produce methane. Overgrowth of archaea on human tissues (e.g., in association with intestines, teeth or lungs) results in excessive removal of SCFAs from the biofilms and this triggers bacteria in the free-living biofilm state to convert to the endoparasitic state and become intracellular in host cells where they incite inflammation and disease...
September 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28915923/season-but-not-symbiont-state-drives-microbiome-structure-in-the-temperate-coral-astrangia-poculata
#13
Koty H Sharp, Zoe A Pratte, Allison H Kerwin, Randi D Rotjan, Frank J Stewart
BACKGROUND: Understanding the associations among corals, their photosynthetic zooxanthella symbionts (Symbiodinium), and coral-associated prokaryotic microbiomes is critical for predicting the fidelity and strength of coral symbioses in the face of growing environmental threats. Most coral-microbiome associations are beneficial, yet the mechanisms that determine the composition of the coral microbiome remain largely unknown. Here, we characterized microbiome diversity in the temperate, facultatively symbiotic coral Astrangia poculata at four seasonal time points near the northernmost limit of the species range...
September 15, 2017: Microbiome
https://www.readbyqxmd.com/read/28915922/recent-urbanization-in-china-is-correlated-with-a-westernized-microbiome-encoding-increased-virulence-and-antibiotic-resistance-genes
#14
Kathryn Winglee, Annie Green Howard, Wei Sha, Raad Z Gharaibeh, Jiawu Liu, Donghui Jin, Anthony A Fodor, Penny Gordon-Larsen
BACKGROUND: Urbanization is associated with an increased risk for a number of diseases, including obesity, diabetes, and cancer, which all also show associations with the microbiome. While microbial community composition has been shown to vary across continents and in traditional versus Westernized societies, few studies have examined urban-rural differences in neighboring communities within a single country undergoing rapid urbanization. In this study, we compared the gut microbiome, plasma metabolome, dietary habits, and health biomarkers of rural and urban people from a single Chinese province...
September 15, 2017: Microbiome
https://www.readbyqxmd.com/read/28915805/antibiotic-resistance-it-s-bad-but-why-isn-t-it-worse
#15
REVIEW
Nicholas Waglechner, Gerard D Wright
Antibiotic natural products are ancient and so is resistance. Consequently, environmental bacteria harbor numerous and varied antibiotic resistance elements. Nevertheless, despite long histories of antibiotic production and exposure, environmental bacteria are not resistant to all known antibiotics. This means that there are barriers to the acquisition of a complete resistance armamentarium. The sources, distribution, and movement of resistance mechanisms in different microbes and bacterial populations are mosaic features that act as barriers to slow this movement, thus moderating the emergence of bacterial pan-resistance...
September 15, 2017: BMC Biology
https://www.readbyqxmd.com/read/28914846/-analysis-of-the-efficiency-of-antimicrobial-treatment-for-community-acquired-pneumonia-in-clinical-practice
#16
O V Zhukova, O V Ruina, S V Kononova, T M Konyshkina
AIM: To analyze actual drug consumption based on the defined daily dose (DDD analysis) and to analyze the utilization of drugs based on their proportion of the total defined daily doses (DU90% analysis) for the antimicrobial therapy of community-acquired pneumonia (CAP) in clinical practice at a hospital in Russia. MATERIAL AND METHODS: The investigation materials were the data of 117 case histories of male (51.3%) and female (48.7%) patients hospitalized with CAP at Nizhny Novgorod City Clinical Hospital Five in 2015...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28914489/responses-of-microbial-decomposers-to-drought-in-streams-may-depend-on-the-environmental-context
#17
Sofia Duarte, Juanita Mora-Gómez, Anna M Romaní, Fernanda Cássio, Cláudia Pascoal
A consequence of drought in streams is the emersion of decomposing leaf litter, which may alter organic matter recycling. We assessed the effects of emersion on decomposition of black poplar leaves and associated microbes (microbial biomass, extracellular enzyme activities and microbial diversity) in two streams with distinct characteristics, in particular nutrients, temperature and oxygen levels. Leaf decomposition rates, fungal biomass and extracellular enzyme activities were lower in the most impacted stream (high nutrients and temperature, low oxygen)...
September 15, 2017: Environmental Microbiology Reports
https://www.readbyqxmd.com/read/28914244/comparative-evaluation-of-salt-water-rinse-with-chlorhexidine-against-oral-microbes-a-school-based-randomized-controlled-trial
#18
V Aravinth, M B Aswath Narayanan, S G Ramesh Kumar, A Leena Selvamary, A Sujatha
BACKGROUND: Mouth rinse that is natural, safe, cost-effective, readily available and culturally acceptable is required as an adjunct to routine tooth brushing to combat dental diseases. The aim of present study was to compare the effectiveness of salt water rinse with chlorhexidine mouth rinse in reducing dental plaque and oral microbial count. MATERIALS AND METHODS: The Minimum Inhibitory Concentration (MIC) of salt water against S. mutans, L.acidophilus, A. actinomycetemcomitans and P...
October 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/28912815/feasibility-of-metatranscriptome-analysis-from-infant-gut-microbiota-adaptation-to-solid-foods-results-in-increased-activity-of-firmicutes-at-six-months
#19
Floor Hugenholtz, Jarmo Ritari, Lotta Nylund, Mark Davids, Reetta Satokari, Willem M de Vos
Newborns are rapidly colonized by microbes and their intestinal tracts contain highly dynamic and rapidly developing microbial communities in the first months of life. In this study, we describe the feasibility of isolating mRNA from rapidly processed faecal samples and applying deep RNA-Seq analysis to provide insight into the active contributors of the microbial community in early life. Specific attention is given to the impact of removing rRNA from the mRNA on the phylogenetic and transcriptional profiling and its analysis depth...
2017: International Journal of Microbiology
https://www.readbyqxmd.com/read/28912244/potential-role-of-intratumor-bacteria-in-mediating-tumor-resistance-to-the-chemotherapeutic-drug-gemcitabine
#20
Leore T Geller, Michal Barzily-Rokni, Tal Danino, Oliver H Jonas, Noam Shental, Deborah Nejman, Nancy Gavert, Yaara Zwang, Zachary A Cooper, Kevin Shee, Christoph A Thaiss, Alexandre Reuben, Jonathan Livny, Roi Avraham, Dennie T Frederick, Matteo Ligorio, Kelly Chatman, Stephen E Johnston, Carrie M Mosher, Alexander Brandis, Garold Fuks, Candice Gurbatri, Vancheswaran Gopalakrishnan, Michael Kim, Mark W Hurd, Matthew Katz, Jason Fleming, Anirban Maitra, David A Smith, Matt Skalak, Jeffrey Bu, Monia Michaud, Sunia A Trauger, Iris Barshack, Talia Golan, Judith Sandbank, Keith T Flaherty, Anna Mandinova, Wendy S Garrett, Sarah P Thayer, Cristina R Ferrone, Curtis Huttenhower, Sangeeta N Bhatia, Dirk Gevers, Jennifer A Wargo, Todd R Golub, Ravid Straussman
Growing evidence suggests that microbes can influence the efficacy of cancer therapies. By studying colon cancer models, we found that bacteria can metabolize the chemotherapeutic drug gemcitabine (2',2'-difluorodeoxycytidine) into its inactive form, 2',2'-difluorodeoxyuridine. Metabolism was dependent on the expression of a long isoform of the bacterial enzyme cytidine deaminase (CDDL), seen primarily in Gammaproteobacteria. In a colon cancer mouse model, gemcitabine resistance was induced by intratumor Gammaproteobacteria, dependent on bacterial CDDL expression, and abrogated by cotreatment with the antibiotic ciprofloxacin...
September 15, 2017: Science
keyword
keyword
121165
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"