Abstract:
:Extracellular agents produced by newly isolated bacterial strains were able to catalyze the synthesis of silver nanoparticles (AgNPs). The most effective isolates were identified as Bacillus pumilus, B. persicus, and Bacillus licheniformis using molecular identification. DLS analysis revealed that the AgNPs synthesized by the above strains were in the size range of 77-92 nm. TEM observations showed that the nanoparticles were coated with a capping agent, which was probably involved in nanoparticle stabilization allowing their perfect dispersion in aqueous solutions. FTIR analyses indicated the presence of proteins in the capping agent of the nanoparticles and suggested that the oxidation of hydroxyl groups of peptide hydrolysates (originated from the growth medium) is coupled to the reduction of silver ions. Energy Dispersive X-ray Spectroscopy confirmed the above results. The nanoparticles, especially those synthesized by B. licheniformis, were stable (zeta potential ranged from -16.6 to -21.3 mV) and showed an excellent in vitro antimicrobial activity against important human pathogens and a considerable antiviral activity against the Bean Yellow Mosaic Virus. The significance of the particular antiviral activity is highlighted, given the significant yield reduction in fava bean crops resulting from Bean Yellow Mosaic Virus infections, in many African countries.
journal_name
Front Microbioljournal_title
Frontiers in microbiologyauthors
Elbeshehy EK,Elazzazy AM,Aggelis Gdoi
10.3389/fmicb.2015.00453subject
Has Abstractpub_date
2015-05-13 00:00:00pages
453issn
1664-302Xjournal_volume
6pub_type
杂志文章abstract::This study was conducted to compare the microbiome and metabolome differences in the colon lumen from two pig breeds with different genetic backgrounds. Fourteen weaned piglets at 30 days of age, including seven Landrace piglets (a lean-type pig breed with a fast growth rate) and seven Meihua piglets (a fatty-type Chi...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2017.01812
更新日期:2017-09-21 00:00:00
abstract::The Megavirales are a newly described order capable of infecting different types of eukaryotic hosts. For the most part, the natural host is unknown. Several methods have been used to detect these viruses, with large discrepancies between molecular methods and co-cultures. To isolate giant viruses, we propose the use ...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2015.01086
更新日期:2015-10-06 00:00:00
abstract::Traditional food products are important to our culture and heritage, and to the continued success of the food industry. Many of the production processes associated with these products have not been subjected to an in-depth microbial compositional analysis. The traditional process of curing meat, both preserves a natur...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2018.03346
更新日期:2019-01-11 00:00:00
abstract::Bacteria often exist in polymicrobial communities where they compete for limited resources. Intrinsic to this competition is the ability of some species to inhibit or kill their competitors. This phenomenon is pervasive throughout the human body where commensal bacteria block the colonization of incoming microorganism...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2019.02977
更新日期:2020-01-15 00:00:00
abstract::Liverwort Blasia pusilla L. recruits soil nitrogen-fixing cyanobacteria of genus Nostoc as symbiotic partners. In this work we compared Nostoc community composition inside the plants and in the soil around them from two distant locations in Northern Norway. STRR fingerprinting and 16S rDNA phylogeny reconstruction sho...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2016.01693
更新日期:2016-11-01 00:00:00
abstract::Biological stability of drinking water refers to the concept of providing consumers with drinking water of same microbial quality at the tap as produced at the water treatment facility. However, uncontrolled growth of bacteria can occur during distribution in water mains and premise plumbing, and can lead to hygienic ...
journal_title:Frontiers in microbiology
pub_type: 杂志文章,评审
doi:10.3389/fmicb.2016.00045
更新日期:2016-02-01 00:00:00
abstract::Nowadays food preservation, quality maintenance, and safety are major growing concerns of the food industry. It is evident that over time consumers' demand for natural and safe food products with stringent regulations to prevent food-borne infectious diseases. Antimicrobial packaging which is thought to be a subset of...
journal_title:Frontiers in microbiology
pub_type: 杂志文章,评审
doi:10.3389/fmicb.2015.00611
更新日期:2015-06-16 00:00:00
abstract::Candida species can cause severe infections associated with high morbidity and mortality. Therefore, it is essential to gain more insight into the anti-fungal host defense response. The advent of omics technology and development of advanced systems biology tools has permitted to approach this in an unbiased and quanti...
journal_title:Frontiers in microbiology
pub_type: 杂志文章,评审
doi:10.3389/fmicb.2016.00154
更新日期:2016-02-16 00:00:00
abstract::Corynebacterium glutamicum is a commonly applied host for the industrial production of amino acids. While valued for its robustness, it is somewhat inferior to competing strains such as Escherichia coli because of the relatively low growth rate of 0.40 h-1 in synthetic, industrial media. Accordingly, adaptive laborato...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2019.01648
更新日期:2019-08-06 00:00:00
abstract::The Gram negative bacterium Yersinia pestis can infect humans by multiple routes to cause plague. Three plague pandemics have occurred and Y. pestis has been linked to biowarfare in the past. The continued risk of plague as a bioweapon has prompted increased research to understand Y. pestis pathogenesis and develop ne...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2010.00119
更新日期:2010-11-04 00:00:00
abstract::Helicobacter pylori (H. pylori) is well-known to be involved in gastric carcinogenesis, associated with deregulation of cell proliferation and epigenetic changes in cancer-related genes. H. pylori infection is largely acquired during childhood, persisting long-term in about half of infected individuals, a subset of wh...
journal_title:Frontiers in microbiology
pub_type: 杂志文章,评审
doi:10.3389/fmicb.2020.00090
更新日期:2020-02-12 00:00:00
abstract::New fungal SMs (SMs) have been successfully described to be produced by means of in vitro-simulated microbial community interactions. Co-culturing of fungi has proved to be an efficient way to induce cell-cell interactions that can promote the activation of cryptic pathways, frequently silent when the strains are grow...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2017.00649
更新日期:2017-04-19 00:00:00
abstract::Clonostachys rosea is a biological control agent against Fusarium graminearum in small grain cereals and maize. Infections with F. graminearum do not only reduce the yield but, due to the production of mycotoxins, also affect the entire value chain of food and feed. In addition, production of other secondary metabolit...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2019.01627
更新日期:2019-07-16 00:00:00
abstract::The abundance of methane in shale gas and of other gases such as carbon monoxide, hydrogen, and carbon dioxide as chemical process byproducts has motivated the use of gas fermentation for bioproduction. Recent advances in metabolic engineering and synthetic biology allow for engineering of microbes metabolizing a vari...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2018.01855
更新日期:2018-08-24 00:00:00
abstract::Alternaria brassicicola is a necrotrophic fungus causing black spot disease and is an economically important seed-borne pathogen of cultivated brassicas. Seed transmission is a crucial component of its parasitic cycle as it promotes long-term survival and dispersal. Recent studies, conducted with the Arabidopsis thali...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2019.01969
更新日期:2019-08-30 00:00:00
abstract::Chlamydia suis is a swine pathogen that has also recently been found to cause zoonotic infections of the human eye, pharynx, and gastrointestinal tract. Many strains contain a tetracycline class C gene [tet(C)] cassette that confers tetracycline resistance. The cassette was likely originally acquired by horizontal gen...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2017.00156
更新日期:2017-02-07 00:00:00
abstract::Host population density is positively associated with the strength of social interactions or the frequency of physical contacts, and thus potentially influences microbial transmission among individuals. However, the relationship between host density and gut microbiota remains unknown. Here, we characterized the gut mi...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2016.00758
更新日期:2016-05-18 00:00:00
abstract::Inhalation of Yersinia pestis can lead to pneumonic plague, which without treatment is inevitably fatal. Two novel formulations of liposome-encapsulated ciprofloxacin, 'ciprofloxacin for inhalation' (CFI, Lipoquin®) and 'dual release ciprofloxacin for inhalation' (DRCFI, Pulmaquin®) containing CFI and ciprofloxacin so...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2017.00091
更新日期:2017-02-06 00:00:00
abstract::The use of antibiotics in farm management (growing crops and raising animals) has become a major area of concern. Its implications is the consequent emergence of antibiotic resistant bacteria (ARB) and accordingly their access into the human food chain with passage of antibiotic resistance genes (ARG) to the normal hu...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2016.01846
更新日期:2016-11-22 00:00:00
abstract::Whole genome sequencing (WGS), using high throughput sequencing technology, reveals the complete sequence of the bacterial genome in a few days. WGS is increasingly being used for source tracking, pathogen surveillance and outbreak investigation due to its high discriminatory power. In the food industry, WGS used for ...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2018.00446
更新日期:2018-03-14 00:00:00
abstract:Background:The hepatitis E virus (HEV) represents a major cause of acute hepatitis worldwide. The majority of HEV cases occur in low-income countries, mainly Asia and Africa, where HEV causes large outbreaks associated with the consumption of contaminated water and high mortality in specific populations. In high-income...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2019.01425
更新日期:2019-06-26 00:00:00
abstract::Lichens are extremely resistant organisms that colonize harsh climatic areas, some of them defined as "Mars-analog sites." There still remain many unsolved questions as to how lichens survive under such extreme conditions. Several studies have been performed to test the resistance of various lichen species under space...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2018.00308
更新日期:2018-03-05 00:00:00
abstract::The compatible solute dimethylsulfoniopropionate (DMSP), made by many marine organisms, is one of Earth's most abundant organosulfur molecules. Many marine bacteria import DMSP and can degrade it as a source of carbon and/or sulfur via DMSP cleavage or DMSP demethylation pathways, which can generate the climate active...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2018.03206
更新日期:2018-12-21 00:00:00
abstract::Sponges that harbor microalgal or, cyanobacterial symbionts may benefit from photosynthetically derived carbohydrates, which are rich in carbon but devoid of nitrogen, and may therefore encounter nitrogen limitation. Diazotrophic communities associated with two Caribbean sponges, Ircinia strobilina and Mycale laxissim...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2014.00561
更新日期:2014-10-28 00:00:00
abstract::Fonsecaea pedrosoi is a dematiaceous fungus and the main causative agent of chromoblastomycosis that is a chronic disease usually affecting the human skin and subcutaneous tissues, which causes deformations and incapacities, being frequently refractory to available therapies. A typical globe-shaped, multiseptated and ...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2018.01383
更新日期:2018-06-29 00:00:00
abstract::Microbial community composition and stability affect pollutant removal for biological/granular activated carbon (BAC/GAC) processes. Here, we pre-loaded the organic carbon substrates sucrose, lactose, and Lysogeny Broth (LB) medium onto new GAC prior to use and then tested whether this substrate pre-loading promoted d...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2020.596156
更新日期:2021-01-12 00:00:00
abstract::In this study we investigated how the source of organic carbon (Corg) and nitrogen (Norg) affects the interactions between fungi of the genus Morchella and bacteria dispersing along their hyphae (fungal highways; FH). We demonstrated that bacteria using FH increase the hydrolysis of an organic nitrogen source that onl...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2019.00124
更新日期:2019-03-01 00:00:00
abstract::The etiology of periodontitis has traditionally been associated to a consortium of three bacterial species-the so-called "red-complex" of periodontal disease-which has been the target for most diagnostic and therapeutic strategies. However, other species have also been found to correlate with disease severity. In addi...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2015.00119
更新日期:2015-02-24 00:00:00
abstract::Ripening cultures containing fungi and bacteria are widely used in smear-ripened cheese production processes, but little is known about the biotic interactions of typical ripening microorganisms at the surface of cheese. We developed a lab-scale mini-cheese model to investigate the biotic interactions of a synthetic c...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2019.01901
更新日期:2019-08-16 00:00:00
abstract::Glycosaminoglycan (GAG) sulfatases, which catalyze the hydrolysis of sulfate esters from GAGs, belong to a large and conserved sulfatase family. Bacterial GAG sulfatases are essential in the process of sulfur cycling and are useful for the structural analysis of GAGs. Only a few GAG-specific sulfatases have been studi...
journal_title:Frontiers in microbiology
pub_type: 杂志文章
doi:10.3389/fmicb.2019.00704
更新日期:2019-04-05 00:00:00