55,025 results match your criteria bacterial community


Conceptual Framework for Incontinence-Associated Dermatitis Based on Scoping Review and Expert Consensus Process.

J Wound Ostomy Continence Nurs 2021 May-Jun 01;48(3):239-250

Manuel Rodríguez-Palma, PhD, MSN, RN, Nursing Home "José Matía Calvo," Cádiz, Spain; and Executive Member of Spanish Pressure Ulcer Advisory Panel.

Incontinence-associated dermatitis (IAD) has been studied over the last decades, but gaps in the knowledge related to its identification, etiological agents, and risk factors remain. We carried out a scoping review about IAD that included systematic reviews, experimental, and observational studies about IAD and its potential risk factors. We retrieved 24 articles that described 100 potential risk factors and which were synthesized by the authors and proposed to a panel of experts. Read More

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Biofouling control: the impact of biofilm dispersal and membrane flushing.

Water Res 2021 Apr 18;198:117163. Epub 2021 Apr 18.

Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands; Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA Leeuwarden, The Netherlands. Electronic address:

Pure culture studies have shown that biofilm dispersal can be triggered if the nutrient supply is discontinued by stopping the flow. Stimulating biofilm dispersal in this manner would provide a sustainable manner to control unwanted biofilm growth in industrial settings, for instance on synthetic membranes used to purify water. The response of multispecies biofilms to nutrient limitation has not been thoroughly studied. Read More

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Sources of Antibiotic Resistant Bacteria (ARB) and Antibiotic Resistance Genes (ARGs) in the Soil: A Review of the Spreading Mechanism and Human Health Risks.

Rev Environ Contam Toxicol 2021 May 5. Epub 2021 May 5.

Key Laboratory of Pollution Processes and Environmental Criteria at Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, People's Republic of China.

Soil is an essential part of our ecosystem and plays a crucial role as a nutrient source, provides habitat for plants and other organisms. Overuse of antibiotics has accelerated the development and dissemination of antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs). ARB and ARGs are recognized as emerging environmental contaminants causing soil pollution and serious risks to public health. Read More

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Dominant egg surface bacteria of Holotrichia oblita (Coleoptera: Scarabaeidae) inhibit the multiplication of Bacillus thuringiensis and Beauveria bassiana.

Sci Rep 2021 May 4;11(1):9499. Epub 2021 May 4.

State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.

Holotrichia oblita (Coleoptera: Scarabaeidae) and some other scarab beetles are the main soil-dwelling pests in China. Bacillus thuringiensis (Bt) and Beauveria bassiana (Bb) are entomopathogens that have been used as biocontrol agents of various pests. However, scarab larvae especially H. Read More

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A MicroRNA Gene Panel Predicts the Vaginal Microbiota Composition.

mSystems 2021 May 4;6(3). Epub 2021 May 4.

Department of Microbiology, Tumor and Cell Biology, Centre for Translational Microbiome Research (CTMR), Karolinska Institutet, Stockholm, Sweden

The vaginal microbiota plays an essential role in vaginal health. The vaginas of many reproductive-age women are dominated by one of the species. However, the vaginas of a large number of women are characterized by the colonization of several other anaerobes. Read More

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Predicted Metabolic Function of the Gut Microbiota of Drosophila melanogaster.

mSystems 2021 May 4;6(3). Epub 2021 May 4.

Department of Entomology, Cornell University, Ithaca, New York, USA.

An important goal for many nutrition-based microbiome studies is to identify the metabolic function of microbes in complex microbial communities and their impact on host physiology. This research can be confounded by poorly understood effects of community composition and host diet on the metabolic traits of individual taxa. Here, we investigated these multiway interactions by constructing and analyzing metabolic models comprising every combination of five bacterial members of the gut microbiome (from single taxa to the five-member community of and species) under three nutrient regimes. Read More

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Bacterial Communities in Concrete Reflect Its Composite Nature and Change with Weathering.

mSystems 2021 May 4;6(3). Epub 2021 May 4.

Department of Civil and Environmental Engineering, University of Delaware, Newark, Delaware, USA

Concrete is an extreme but common environment and is home to microbial communities adapted to alkaline, saline, and oligotrophic conditions. Microbes inside the concrete that makes up buildings or roads have received little attention despite their ubiquity and capacity to interact with the concrete. Because concrete is a composite of materials which have their own microbial communities, we hypothesized that the microbial communities of concrete reflect those of the concrete components and that these communities change as the concrete ages. Read More

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Streptococcus pneumoniae Binds to Host Lactate Dehydrogenase via PspA and PspC To Enhance Virulence.

mBio 2021 May 4;12(3). Epub 2021 May 4.

Department of Microbiology, The University of Alabama at Birmingham, Birmingham, Alabama, USA

Pneumococcal surface protein A (PspA) and pneumococcal surface protein C (PspC, also called CbpA) are major virulence factors of (). These surface-exposed choline-binding proteins (CBPs) function independently to inhibit opsonization, neutralize antimicrobial factors, or serve as adhesins. PspA and PspC both carry a proline-rich domain (PRD) whose role, other than serving as a flexible connector between the N-terminal and C-terminal domains, was up to this point unknown. Read More

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Convergence of the turkey gut microbiota following cohabitation under commercial settings.

J Anim Sci Biotechnol 2021 May 5;12(1):59. Epub 2021 May 5.

Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, MN, USA.

Background: Microbiota development is a critical aspect of turkey poult maturation, and the succession of microbes in the turkey gut has been shown to correlate with poult performance. The purpose of this study was to determine the fate of the microbiota in turkey poults after movement of birds first raised in an isolated hatch brood system into a more traditional commercial brood facility with pre-existing birds. Turkey poults were first divided into groups raised in conventional brood pens from day-of-hatch and those raised in an experimental hatch brood system. Read More

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Synergistic action of the gut microbiota in environmental RNA interference in a leaf beetle.

Microbiome 2021 May 4;9(1):98. Epub 2021 May 4.

State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan, 430062, China.

Background: RNA interference (RNAi) has emerged as an efficient tool to control insect pests. When insects ingest double-stranded RNAs (dsRNAs) targeted against essential genes, strong gene silencing and mortality can be induced. To exert their function, dsRNA molecules must pass through the insect's gut and enter epithelial cells and/or the hemolymph. Read More

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Shift of Dominant Species in Plant Community and Soil Chemical Properties Shape Soil Bacterial Community Characteristics and Putative Functions: A Case Study on Topographic Variation in a Mountain Pasture.

Microorganisms 2021 Apr 29;9(5). Epub 2021 Apr 29.

National Institute of Agricultural Sciences, RDA, Wanju 55365, Korea.

Reducing management intensity according to the topography of pastures can change the dominant plant species from sown forages to weeds. It is unclear how changes in species dominance in plant community drive spatial variation in soil bacterial community characteristics and functions in association with edaphic condition. Analysing separately the effects of both plant communities and soil chemical properties on bacterial community is crucial for understanding the biogeographic process at a small scale. Read More

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The Responses to Long-Term Water Addition of Soil Bacterial, Archaeal, and Fungal Communities in A Desert Ecosystem.

Microorganisms 2021 Apr 30;9(5). Epub 2021 Apr 30.

Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China.

The response of microbial communities to continual and prolonged water exposure provides useful insight when facing global climate changes that cause increased and uneven precipitation and extreme rainfall events. In this study, we investigated an in situ manipulative experiment with four levels of water exposure (ambient precipitation +0%, +25%, +50%, and +100% of local annual mean precipitation) in a desert ecosystem of China. After 9 years of water addition, Illumina sequencing was used to analyze taxonomic compositions of the soil bacterial, archaeal, and fungal communities. Read More

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Analysis of Endophyte Diversity of from Different Production Areas in Gansu Province of China and the Association with Secondary Metabolite.

Microorganisms 2021 Apr 30;9(5). Epub 2021 Apr 30.

College of Life Sciences, Northwest Normal University, Lanzhou 730070, China.

Investigations of the differences in the metabolites of medicinal plants have typically focused on the effects of external environmental factors. However, little is known about the relationship between endophytes diversity and host metabolites. We used high-throughput sequencing methods to compare the endophyte diversity of from eight different production areas in Gansu Province of China and to analyze the association between those areas and five secondary metabolites (aloe-emodin, rhein, emodin, chrysophanol, and physcion). Read More

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Microbiota Associated with Different Developmental Stages of the Dry Rot Fungus .

J Fungi (Basel) 2021 Apr 30;7(5). Epub 2021 Apr 30.

Department of Microbiology, University of Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria.

The dry rot fungus causes significant structural damage by decaying construction timber, resulting in costly restoration procedures. Dry rot fungi decompose cellulose and hemicellulose and are often accompanied by a succession of bacteria and other fungi. Bacterial-fungal interactions (BFI) have a considerable impact on all the partners, ranging from antagonistic to beneficial relationships. Read More

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Photophysical and Antibacterial Properties of Porphyrins Encapsulated inside Acetylated Lignin Nanoparticles.

Antibiotics (Basel) 2021 Apr 30;10(5). Epub 2021 Apr 30.

PEIRENE Laboratory, Faculty of Sciences and Techniques, University of Limoges, 87060 Limoges, France.

Lignin has recently attracted the attention of the scientific community, as a suitable raw material for biomedical applications. In this work, acetylated lignin was used to encapsulate five different porphyrins, aiming to preserve their photophysical properties, and for further use as antibacterial treatment. The obtained nanoparticles were physically characterized, through dynamic light scattering size measurement, polydispersity index and zeta potential values. Read More

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Interactions between Rainbow Trout Eyed Eggs and spp. Using a Bath Challenge Model: Preliminary Evaluation of Bacteriophages as Pathogen Control Agents.

Microorganisms 2021 Apr 30;9(5). Epub 2021 Apr 30.

Unit for Fish and Shellfish Diseases, National Institute of Aquatic Resources, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.

The microbial community surrounding fish eyed eggs can harbor pathogenic bacteria. In this study we focused on rainbow trout () eyed eggs and the potential of bacteriophages against the pathogenic bacteria and . An infection bath method was first established, and the effects of singular phages on fish eggs was assessed (survival of eyed eggs, interaction of phages with eyed eggs). Read More

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Antibiotic resistance, antimicrobial residues and bacterial community diversity in pasture-raised poultry, swine and beef cattle manures.

J Anim Sci 2021 May 4. Epub 2021 May 4.

University of Pennsylvania, School of Veterinary Medicine, Kennett Square, PA , USA.

Animal manure can be a source of antibiotic resistant genes (ARG) and pharmaceutical residues; however, few studies have evaluated the presence of ARG in pasture-raised animal production systems. The objective of this study was to examine changes in microbiome diversity and the presence of antibiotic residues (ABR) on three farms that contained a diverse range of animal species: pasture-raised poultry (broiler and layer), swine and beef cattle. Total bacterial communities were determined using 16S rRNA microbiome analysis, while specific ARG (sulfonamide [Sul; Sul1] and tetracycline [Tet; TetA]) were enumerated by qPCR. Read More

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Aeration strategies and temperature effects on the partial nitritation/anammox process for nitrogen removal: performance and bacterial community assessment.

Environ Technol 2021 May 4:1-35. Epub 2021 May 4.

Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais - UFMG, Av. Antônio Carlos 6627, 31270-901. Belo Horizonte, MG, Brazil.

Partial nitritation/anammox process (PN/A) could be a promising alternative for nitrogen removal from high-strength wastewater. There is, however, a lack information about suitable aeration and temperature for PN/A in single-stage reactors for high-strength wastewater, such as food waste (FW) digestate treatment. To this end, a laboratory-scale (10L) partial nitritation/anammox sequencing batch reactor was operated for more than 230 days under four different intermittent aeration strategies and temperature variations (35°C and ambient temperature - 26 to 29° C) to investigate the feasibility of nitrogen removal from real food waste digestate. Read More

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Salt-Tolerant Metabolomics for Exometabolomic Measurements of Marine Bacterial Isolates.

Anal Chem 2021 May 4. Epub 2021 May 4.

Institute of Molecular Systems Biology, ETH Zürich, 8093 Zurich, Switzerland.

Identifying and quantifying metabolites secreted by microbial isolates can aid in understanding the physiological traits of diverse species and their interaction with the environment. Mass spectrometry-based metabolomics has potential to provide a holistic view of the exometabolism of marine isolates, but the high salt content of such samples interferes with chromatography and ionization during the measurement of polar exometabolites. The most common desalting methods are faced with major limitations, including limited separation of small polar metabolites from salts, the use of organic solvents that cannot accommodate large salt quantities, and sample throughput. Read More

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Microbial species performance responses to environmental changes: genomic traits and nutrient availability.

Ecology 2021 May 3:e03382. Epub 2021 May 3.

State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China.

How microbial species performance such as growth rate and carbon assimilation rate responds to environmental changes is a challenging question, especially for complex communities. This limits our ability to understand how species performance responses to environmental changes (that is, species environmental responses) of microbes could be linked to genomic traits and nutrient availability. Based on stable isotope labelling of DNA, we propose a new approach with effect size metrics to quantify the species environmental responses of microbes by comparing the species performance between defined control and treatment groups. Read More

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Metabolic flexibility allows bacterial habitat generalists to become dominant in a frequently disturbed ecosystem.

ISME J 2021 May 3. Epub 2021 May 3.

Department of Microbiology, Biomedicine Discovery Institute, Clayton, VIC, Australia.

Ecological theory suggests that habitat disturbance differentially influences distributions of habitat generalist and specialist species. While well-established for macroorganisms, this theory has rarely been explored for microorganisms. Here we tested these principles in permeable (sandy) sediments, ecosystems with much spatiotemporal variation in resource availability and physicochemical conditions. Read More

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Archaeal and bacterial communities assembly and co-occurrence networks in subtropical mangrove sediments under Spartina alterniflora invasion.

Environ Microbiome 2021 May 3;16(1):10. Epub 2021 May 3.

College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China.

Background: Mangrove ecosystems are vulnerable due to the exotic Spartina alterniflora (S. alterniflora) invasion in China. However, little is known about mangrove sediment microbial community assembly processes and interactions under S. Read More

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Unraveling bacterial community structure and function and their links with natural salinity gradient in the Yellow River Delta.

Sci Total Environ 2021 Jun 8;773:145673. Epub 2021 Feb 8.

Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, PR China.

Salinization can change the soil environment and affect microbial processes. In this study, soil samples were collected from Zone A (Phragmites australis wetlands), Zone B (P. australis and Suaeda salsa wetlands), and Zone C (Spartina alterniflora wetlands) in the Yellow River Delta. Read More

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Effect of earthworms in reduction and fate of antibiotic resistant bacteria (ARB) and antibiotic resistant genes (ARGs) during clinical laboratory wastewater treatment by vermifiltration.

Sci Total Environ 2021 Jun 6;773:145152. Epub 2021 Feb 6.

Environmental Engineering Group, Department of Civil Engineering, Indian Institute of Technology Roorkee, India.

In the recent decades, the role of wastewater treatment plants has been entrenched for the dissemination of antibiotic resistant bacteria into the environment. The present study explores the dynamics of earthworms-microorganisms interactions involved in the high treatment efficacy of vermifiltration technology along with reduction of antibiotic resistant bacteria (ARB). This study is the first of its kind to investigate the performance efficacy of vermifilter (VF) for clinical laboratory wastewater treatment. Read More

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Microbial community response to ciprofloxacin toxicity in sponge membrane bioreactor.

Sci Total Environ 2021 Jun 7;773:145041. Epub 2021 Feb 7.

Graduate School of Biomedical Science, Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan.

This study aims to offer insights into how ciprofloxacin (CIP) impact bacterial community structures in the Sponge-MBR process when CIP is spiked into hospital wastewater. We found that the CIP toxicity decreased richness critical phylotypes such as phylum class ẟ-, β-, ɣ-proteobacteria, and Flavobacteria that co-respond to suppress denitrification and cake fouling to 37% and 28% respectively. Cluster analysis shows that the different community structures were formed under the influence of CIP toxicity. Read More

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Compositional and functional responses of bacterial community to titanium dioxide nanoparticles varied with soil heterogeneity and exposure duration.

Sci Total Environ 2021 Jun 4;773:144895. Epub 2021 Feb 4.

Institute of Environmental Sciences (CML), Leiden University, P.O. Box 9518, 2300 RA Leiden, the Netherlands.

Titanium dioxide nanoparticles (TiO NPs) are widely used as nano-agrochemicals. In this study we investigated the influence of soil heterogeneity on bacterial communities exposed to TiO NPs over time. Clay and sandy soils with low- and high-organic matter contents were exposed to environmentally relevant concentration of TiO NPs (1 mg/kg) and soil bacterial communities were sampled after short-term (15 days) and long-term exposure (60 days). Read More

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Implication on selection and replacement of granular activated carbon used in biologically activated carbon filters through meta-omics analysis.

Water Res 2021 Apr 13;198:117152. Epub 2021 Apr 13.

School of Environment, Tsinghua University, Beijing100084, China; Research Institute for Environmental Innovation (Suzhou) Tsinghua, Suzhou215163, China. Electronic address:

Biologically activated carbon (BAC) filters are widely used in China and worldwide as an essential part of advanced water treatment. However, it is unclear how to properly select the granular activated carbon (GAC) used in BAC filters and to determine when GAC should be replaced. In this study, five BAC filters, each filled with a different coconut- or coal-based GAC with different physicochemical properties, were run continuously for 400 days. Read More

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Reduction and bacterial adsorption of dissolved mercuric ion by indigenous bacteria at the Oak Ridge Reservation site.

Chemosphere 2021 Apr 23;280:130629. Epub 2021 Apr 23.

Department of Civil and Environmental Engineering at FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL, 32310, USA.

Mercury exists in various forms in the environment and the indigenous bacteria mediated processes have the potential to be used for mercury remediation. In this study, two mixed cultures of indigenous bacteria at the Oak Ridge Reservation site (i.e. Read More

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Exploring the bacterial community for starters in traditional high-salt fermented Chinese fish (Suanyu).

Food Chem 2021 Apr 20;358:129863. Epub 2021 Apr 20.

School of Liquor and Food Engineering, Guizhou University, Guiyang, China; Guizhou Provincial Key Laboratory of Agricultural and Animal Products Storage and Processing, Guiyang, China; Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, Ministry of Education, Guiyang, China. Electronic address:

Traditional high-salt fermented Suanyu is an ethnic fermented fish product in southwest China. Lactic acid bacteria (LAB) are the most appropriate strains because of their technological properties during ripening fermentation. The diversity of LAB in high-salt fermented Chinese Suanyu was examined through high-throughput sequencing (HTS), and the most suitable LAB strain was acquired through strain isolation and characterization, surimi simulation fermentation system, and principal component analysis (PCA). Read More

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