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Frontiers in Microbiology

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https://www.readbyqxmd.com/read/28533771/corrigendum-microbiological-characteristics-and-clinical-features-of-cardiac-implantable-electronic-device-infections-at-a-tertiary-hospital-in-china
#1
Ruobing Wang, Xuebin Li, Qi Wang, Yawei Zhang, Hui Wang
[This corrects the article on p. 360 in vol. 8, PMID: 28321212.].
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28533770/from-vineyard-soil-to-wine-fermentation-microbiome-approximations-to-explain-the-terroir-concept
#2
REVIEW
Ignacio Belda, Iratxe Zarraonaindia, Matthew Perisin, Antonio Palacios, Alberto Acedo
Wine originally emerged as a serendipitous mix of chemistry and biology, where microorganisms played a decisive role. From these ancient fermentations to the current monitored industrial processes, winegrowers and winemakers have been continuously changing their practices according to scientific knowledge and advances. A new enology direction is emerging and aiming to blend the complexity of spontaneous fermentations with industrial safety of monitored fermentations. In this context, wines with distinctive autochthonous peculiarities have a great acceptance among consumers, causing important economic returns...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28533769/celecoxib-enhances-the-efficacy-of-low-dose-antibiotic-treatment-against-polymicrobial-sepsis-in-mice-and-clinical-isolates-of-eskape-pathogens
#3
Madhavi Annamanedi, Gajapati Y N Varma, K Anuradha, Arunasree M Kalle
Treatment of multidrug resistant bacterial infections has been a great challenge globally. Previous studies including our study have highlighted the use of celecoxib, a non-steroidal anti-inflammatory drug in combination with antibiotic has decreased the minimal inhibitory concentration to limit Staphylococcus aureus infection. However, the efficacy of this combinatorial treatment against various pathogenic bacteria is not determined. Therefore, we have evaluated the potential use of celecoxib in combination with low doses of antibiotic in limiting Gram-positive and Gram-negative bacteria in vivo in murine polymicrobial sepsis developed by cecum ligation and puncture (CLP) method and against clinically isolated human ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28533768/novel-large-sulfur-bacteria-in-the-metagenomes-of-groundwater-fed-chemosynthetic-microbial-mats-in-the-lake-huron-basin
#4
Allison M Sharrar, Beverly E Flood, Jake V Bailey, Daniel S Jones, Bopaiah A Biddanda, Steven A Ruberg, Daniel N Marcus, Gregory J Dick
Little is known about large sulfur bacteria (LSB) that inhabit sulfidic groundwater seeps in large lakes. To examine how geochemically relevant microbial metabolisms are partitioned among community members, we conducted metagenomic analysis of a chemosynthetic microbial mat in the Isolated Sinkhole, which is in a deep, aphotic environment of Lake Huron. For comparison, we also analyzed a white mat in an artesian fountain that is fed by groundwater similar to Isolated Sinkhole, but that sits in shallow water and is exposed to sunlight...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28533767/characterization-of-mycobacterium-chelonae-like-strains-by-comparative-genomics
#5
Christiane L Nogueira, Luiz G P de Almeida, Maria C Menendez, Maria J Garcia, Luciano A Digiampietri, Erica Chimara, Margo Cnockaert, Juan C Palomino, Françoise Portaels, Anandi Martin, Peter Vandamme, Sylvia C Leão
Isolates of the Mycobacterium chelonae-M. abscessus complex are subdivided into four clusters (CHI to CHIV) in the INNO-LiPA® Mycobacterium spp DNA strip assay. A considerable phenotypic variability was observed among isolates of the CHII cluster. In this study, we examined the diversity of 26 CHII cluster isolates by phenotypic analysis, drug susceptibility testing, whole genome sequencing and single-gene analysis. Pairwise genome comparisons were performed using several approaches, including average nucleotide identity (ANI) and genome-to-genome distance (GGD) among others...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28533766/predicting-the-hma-lma-status-in-marine-sponges-by-machine-learning
#6
Lucas Moitinho-Silva, Georg Steinert, Shaun Nielsen, Cristiane C P Hardoim, Yu-Chen Wu, Grace P McCormack, Susanna López-Legentil, Roman Marchant, Nicole Webster, Torsten Thomas, Ute Hentschel
The dichotomy between high microbial abundance (HMA) and low microbial abundance (LMA) sponges has been observed in sponge-microbe symbiosis, although the extent of this pattern remains poorly unknown. We characterized the differences between the microbiomes of HMA (n = 19) and LMA (n = 17) sponges (575 specimens) present in the Sponge Microbiome Project. HMA sponges were associated with richer and more diverse microbiomes than LMA sponges, as indicated by the comparison of alpha diversity metrics. Microbial community structures differed between HMA and LMA sponges considering Operational Taxonomic Units (OTU) abundances and across microbial taxonomic levels, from phylum to species...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28529509/a-novel-esat-6-secretion-system-secreted-protein-esxx-of-community-associated-staphylococcus-aureus-lineage-st398-contributes-to-immune-evasion-and-virulence
#7
Yingxin Dai, Yanan Wang, Qian Liu, Qianqian Gao, Huiying Lu, Hongwei Meng, Juanxiu Qin, Mo Hu, Min Li
The ESAT-6 secretion system (ESS) has been reported to contribute to the virulence and pathogenicity of several Staphylococcus aureus strains such as USA300 and Newman. However, the role of the ESS in community-associated S. aureus (CA-SA) lineage ST398 in China is not well understood. By comparing the ess locus of ST398 with the published S. aureus sequence in the NCBI database, we found one gene in the ess locus encoding a novel WXG superfamily protein that is highly conserved only in ST398. LC-MS/MS and Western blot analysis revealed that this protein is a novel secreted protein controlled by the ST398 ESS, and we named the protein EsxX...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28529508/the-biosynthetic-gene-cluster-for-andrastin-a-in-penicillium-roqueforti
#8
Juan F Rojas-Aedo, Carlos Gil-Durán, Abdiel Del-Cid, Natalia Valdés, Pamela Álamos, Inmaculada Vaca, Ramón O García-Rico, Gloria Levicán, Mario Tello, Renato Chávez
Penicillium roqueforti is a filamentous fungus involved in the ripening of several kinds of blue cheeses. In addition, this fungus produces several secondary metabolites, including the meroterpenoid compound andrastin A, a promising antitumoral compound. However, to date the genomic cluster responsible for the biosynthesis of this compound in P. roqueforti has not been described. In this work, we have sequenced and annotated a genomic region of approximately 29.4 kbp (named the adr gene cluster) that is involved in the biosynthesis of andrastin A in P...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28529507/a-novel-and-efficient-method-for-bacteria-genome-editing-employing-both-crispr-cas9-and-an-antibiotic-resistance-cassette
#9
Hong Zhang, Qiu-Xiang Cheng, Ai-Min Liu, Guo-Ping Zhao, Jin Wang
As Cas9-mediated cleavage requires both protospacer and protospacer adjacent motif (PAM) sequences, it is impossible to employ the CRISPR/Cas9 system to directly edit genomic sites without available PAM sequences nearby. Here, we optimized the CRISPR/Cas9 system and developed an innovative two-step strategy for efficient genome editing of any sites, which did not rely on the availability of PAM sequences. An antibiotic resistance cassette was employed as both a positive and a negative selection marker. By integrating the optimized two-plasmid CRISPR/Cas system and donor DNA, we achieved gene insertion and point mutation with high efficiency in Escherichia coli, and importantly, obtained clean mutants with no other unwanted mutations...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28529506/roles-of-regulatory-rnas-for-antibiotic-resistance-in-bacteria-and-their-potential-value-as-novel-drug-targets
#10
REVIEW
Petra Dersch, Muna A Khan, Sabrina Mühlen, Boris Görke
The emergence of antibiotic resistance mechanisms among bacterial pathogens increases the demand for novel treatment strategies. Lately, the contribution of non-coding RNAs to antibiotic resistance and their potential value as drug targets became evident. RNA attenuator elements in mRNA leader regions couple expression of resistance genes to the presence of the cognate antibiotic. Trans-encoded small RNAs (sRNAs) modulate antibiotic tolerance by base-pairing with mRNAs encoding functions important for resistance such as metabolic enzymes, drug efflux pumps, or transport proteins...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28529505/comparative-genomics-unravels-the-functional-roles-of-co-occurring-acidophilic-bacteria-in-bioleaching-heaps
#11
Xian Zhang, Xueduan Liu, Yili Liang, Yunhua Xiao, Liyuan Ma, Xue Guo, Bo Miao, Hongwei Liu, Deliang Peng, Wenkun Huang, Huaqun Yin
The spatial-temporal distribution of populations in various econiches is thought to be potentially related to individual differences in the utilization of nutrients or other resources, but their functional roles in the microbial communities remain elusive. We compared differentiation in gene repertoire and metabolic profiles, with a focus on the potential functional traits of three commonly recognized members (Acidithiobacillus caldus, Leptospirillum ferriphilum, and Sulfobacillus thermosulfidooxidans) in bioleaching heaps...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28529504/a-novel-avian-paramyxovirus-putative-serotype-15-isolated-from-wild-birds
#12
Hyun-Jeong Lee, Ji-Ye Kim, Youn-Jeong Lee, Eun-Kyung Lee, Byoung-Min Song, Hee-Soo Lee, Kang-Seuk Choi
In January 2014, a viral hemagglutinating agent named UPO216 was isolated from fecal droppings of wild birds at the UPO wetland in South Korea during an avian influenza surveillance program. Electron microscopy identified the UPO216 virus as an avian paramyxovirus (APMV). Pathogenicity tests and molecular pathotyping revealed that the virus was avirulent in chickens. The UPO216 virus was assigned to a serological group antigenically distinct from known serotypes of APMV (-1, -2, -3, -4, -6, -7, -8, and -9) by hemagglutination inhibition test, despite showing weak cross-reactivity with APMV-1 and APMV-9...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28529503/response-of-methanogenic-microbial-communities-to-desiccation-stress-in-flooded-and-rain-fed-paddy-soil-from-thailand
#13
Andreas Reim, Marcela Hernández, Melanie Klose, Amnat Chidthaisong, Monthira Yuttitham, Ralf Conrad
Rice paddies in central Thailand are flooded either by irrigation (irrigated rice) or by rain (rain-fed rice). The paddy soils and their microbial communities thus experience permanent or arbitrary submergence, respectively. Since methane production depends on anaerobic conditions, we hypothesized that structure and function of the methanogenic microbial communities are different in irrigated and rain-fed paddies and react differently upon desiccation stress. We determined rates and relative proportions of hydrogenotrophic and aceticlastic methanogenesis before and after short-term drying of soil samples from replicate fields...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28529502/effect-of-rocket-eruca-sativa-extract-on-mrsa-growth-and-proteome-metabolic-adjustments-in-plant-based-media
#14
Agapi I Doulgeraki, Georgios Efthimiou, Spiros Paramithiotis, Katherine M Pappas, Milton A Typas, George-John Nychas
The emergence of methicillin-resistant Staphylococcus aureus (MRSA) in food has provoked a great concern about the presence of MRSA in associated foodstuff. Although MRSA is often detected in various retailed meat products, it seems that food handlers are more strongly associated with this type of food contamination. Thus, it can be easily postulated that any food could be contaminated with this pathogen in an industrial environment or in household and cause food poisoning. To this direction, the effect of rocket (Eruca sativa) extract on MRSA growth and proteome was examined in the present study...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28529501/microbial-degradation-of-lobster-shells-to-extract-chitin-derivatives-for-plant-disease-management
#15
Gayathri Ilangumaran, Glenn Stratton, Sridhar Ravichandran, Pushp S Shukla, Philippe Potin, Samuel Asiedu, Balakrishnan Prithiviraj
Biodegradation of lobster shells by chitinolytic microorganisms are an environment safe approach to utilize lobster processing wastes for chitin derivation. In this study, we report degradation activities of two microbes, "S223" and "S224" isolated from soil samples that had the highest rate of deproteinization, demineralization and chitinolysis among ten microorganisms screened. Isolates S223 and S224 had 27.3 and 103.8 protease units mg(-1) protein and 12.3 and 11.2 μg ml(-1) of calcium in their samples, respectively, after 1 week of incubation with raw lobster shells...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28529500/co-existence-of-methanogenesis-and-sulfate-reduction-with-common-substrates-in-sulfate-rich-estuarine-sediments
#16
Michal Sela-Adler, Zeev Ronen, Barak Herut, Gilad Antler, Hanni Vigderovich, Werner Eckert, Orit Sivan
The competition between sulfate reducing bacteria and methanogens over common substrates has been proposed as a critical control for methane production. In this study, we examined the co-existence of methanogenesis and sulfate reduction with shared substrates over a large range of sulfate concentrations and rates of sulfate reduction in estuarine systems, where these processes are the key terminal sink for organic carbon. Incubation experiments were carried out with sediment samples from the sulfate-methane transition zone of the Yarqon (Israel) estuary with different substrates and inhibitors along a sulfate concentrations gradient from 1 to 10 mM...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28522999/fermentation-ph-modulates-the-size-distributions-and-functional-properties-of-gluconobacter-albidus-tmw-2-1191-levan
#17
Tharalinee Ua-Arak, Frank Jakob, Rudi F Vogel
Bacterial levan has gained an increasing interest over the last decades due to its unique characteristics and multiple possible applications. Levan and other exopolysaccharides (EPSs) production are usually optimized to obtain the highest concentration or yield while a possible change of the molecular size and mass during the production process is mostly neglected. In this study, the molar mass and radius of levan samples were monitored during fermentations with the food-grade, levan-producing acetic acid bacterium Gluconobacter (G...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28522998/genetic-polymorphism-in-wine-yeasts-mechanisms-and-methods-for-its-detection
#18
REVIEW
José M Guillamón, Eladio Barrio
The processes of yeast selection for using as wine fermentation starters have revealed a great phenotypic diversity both at interspecific and intraspecific level, which is explained by a corresponding genetic variation among different yeast isolates. Thus, the mechanisms involved in promoting these genetic changes are the main engine generating yeast biodiversity. Currently, an important task to understand biodiversity, population structure and evolutionary history of wine yeasts is the study of the molecular mechanisms involved in yeast adaptation to wine fermentation, and on remodeling the genomic features of wine yeast, unconsciously selected since the advent of winemaking...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28522997/biogeographic-comparison-of-lophelia-associated-bacterial-communities-in-the-western-atlantic-reveals-conserved-core-microbiome
#19
Christina A Kellogg, Dawn B Goldsmith, Michael A Gray
Over the last decade, publications on deep-sea corals have tripled. Most attention has been paid to Lophelia pertusa, a globally distributed scleractinian coral that creates critical three-dimensional habitat in the deep ocean. The bacterial community associated with L. pertusa has been previously described by a number of studies at sites in the Mediterranean Sea, Norwegian fjords, off Great Britain, and in the Gulf of Mexico (GOM). However, use of different methodologies prevents direct comparisons in most cases...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28522996/interfering-satellite-rnas-of-bamboo-mosaic-virus
#20
REVIEW
Kuan-Yu Lin, Na-Sheng Lin
Satellite RNAs (satRNAs) are sub-viral agents that may interact with their cognate helper virus (HV) and host plant synergistically and/or antagonistically. SatRNAs totally depend on the HV for replication, so satRNAs and HV usually evolve similar secondary or tertiary RNA structures that are recognized by a replication complex, although satRNAs and HV do not share an appreciable sequence homology. The satRNAs of Bamboo mosaic virus (satBaMV), the only satRNAs of the genus Potexvirus, have become one of the models of how satRNAs can modulate HV replication and virus-induced symptoms...
2017: Frontiers in Microbiology
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