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https://www.readbyqxmd.com/read/29775545/effect-of-bamboo-vinegar-powder-as-an-antibiotic-alternative-on-the-digesta-bacteria-communities-of-finishing-pigs
#1
Huan Qu, Yanjie Huang, Yinghao Shi, Ying Liu, Shenglong Wu, Wenbin Bao
This study investigated the use for bamboo vinegar powder as an antibiotic alternative in the diet of growing-finishing pigs by examining their digestive bacterial communities. Forty-five Duroc × Landrace × Yorkshire growing-finishing pigs were randomly allocated to five diet groups: 0%,0.5%, 1.0%, or 1.5% bamboo vinegar levels and antibiotics. After 37 days, the digesta in duodenum of four pigs from each treatment were analyzed for their bacterial community compositions using 16S rRNA gene sequencing. Addition of 1...
May 18, 2018: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/29774831/urban-wild-boars-and-risk-for-zoonotic-streptococcus-suis-spain
#2
Xavier Fernández-Aguilar, Marcelo Gottschalk, Virginia Aragon, Jordi Càmara, Carmen Ardanuy, Roser Velarde, Nuria Galofré-Milà, Raquel Castillo-Contreras, Jorge R López-Olvera, Gregorio Mentaberre, Andreu Colom-Cadena, Santiago Lavín, Oscar Cabezón
Urban wild boars (Sus scrofa) from Barcelona, Spain, harbor great diversity of Streptococcus suis strains, including strains with the cps2 gene and with the same molecular profile as local human cases. The increasing trend of potential effective contacts for S. suis transmission is of public health concern.
June 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29774245/evaluation-of-phylogenetic-reconstruction-methods-using-bacterial-whole-genomes-a-simulation-based-study
#3
John A Lees, Michelle Kendall, Julian Parkhill, Caroline Colijn, Stephen D Bentley, Simon R Harris
Background : Phylogenetic reconstruction is a necessary first step in many analyses which use whole genome sequence data from bacterial populations. There are many available methods to infer phylogenies, and these have various advantages and disadvantages, but few unbiased comparisons of the range of approaches have been made. Methods : We simulated data from a defined "true tree" using a realistic evolutionary model. We built phylogenies from this data using a range of methods, and compared reconstructed trees to the true tree using two measures, noting the computational time needed for different phylogenetic reconstructions...
2018: Wellcome Open Research
https://www.readbyqxmd.com/read/29774014/oral-microbiota-community-dynamics-associated-with-oral-squamous-cell-carcinoma-staging
#4
Chia-Yu Yang, Yuan-Ming Yeh, Hai-Ying Yu, Chia-Yin Chin, Chia-Wei Hsu, Hsuan Liu, Po-Jung Huang, Song-Nian Hu, Chun-Ta Liao, Kai-Ping Chang, Yu-Liang Chang
Oral squamous cell carcinoma (OSCC) is a highly aggressive cancer and the fourth leading malignancy among males in Taiwan. Some pathogenic bacteria are associated with periodontitis and oral cancer. However, the comprehensive profile of the oral microbiome during the cancer's progression from the early stage to the late stage is still unclear. We profiled the oral microbiota and identified bacteria biomarkers associated with OSCC. The microbiota of an oral rinse from 51 healthy individuals and 197 OSCC patients at different stages were investigated using 16S rRNA V3V4 amplicon sequencing, followed by bioinformatics and statistical analyses...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29773945/predictive-factors-in-the-treatment-of-streptococcal-endophthalmitis
#5
Yosanan Yospaiboon, Kidakarn Meethongkam, Suthasinee Sinawat, Wipada Laovirojjanakul, Tanapat Ratanapakorn, Thuss Sanguansak, Chavakij Bhoomibunchoo
Objective: To evaluate visual outcomes and possible predictive factors in the treatment of infectious endophthalmitis caused by Streptococcus species during 2012-2016 at a large referral eye center in northeastern Thailand. Methods: A retrospective medical record chart review of patients with culture-positive endophthalmitis caused by Streptococcus species was conducted. Demographic data including age, gender, occupation, duration of symptoms, time to surgery, surgical procedures, initial visual acuity at presentation, and final visual acuity after treatment were collected and analyzed...
2018: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29773639/draft-genome-sequence-of-streptococcus-suis-strain-ssrc-1-a-human-isolate-from-a-fatal-case-of-toxic-shock-syndrome
#6
Silvia Fillo, Fabiola Mancini, Anna Anselmo, Antonella Fortunato, Giovanni Rezza, Florigio Lista, Alessandra Ciervo
Streptococcus suis is an economically important pathogen in the pig industry and is also an emerging zoonotic agent responsible for severe infections in humans. Here, we report the genome sequence of S. suis strain SsRC-1. Specifically, this strain was a serotype 2 and was isolated from a human fatal case of toxic shock syndrome (TSS) in Italy.
May 17, 2018: Genome Announcements
https://www.readbyqxmd.com/read/29773170/iron-and-innate-antimicrobial-immunity-depriving-the-pathogen-defending-the-host
#7
REVIEW
Manfred Nairz, Stefanie Dichtl, Andrea Schroll, David Haschka, Piotr Tymoszuk, Igor Theurl, Günter Weiss
The acute-phase response is triggered by the presence of infectious agents and danger signals which indicate hazards for the integrity of the mammalian body. One central feature of this response is the sequestration of iron into storage compartments including macrophages. This limits the availability of this essential nutrient for circulating pathogens, a host defence strategy known as 'nutritional immunity'. Iron metabolism and the immune response are intimately linked. In infections, the availability of iron affects both the efficacy of antimicrobial immune pathways and pathogen proliferation...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29772827/physicochemical-nutritional-and-organoleptic-characterization-of-a-skimmed-goat-milk-fermented-with-the-probiotic-strain-lactobacillus-plantarum-c4
#8
Miriam Moreno-Montoro, Miguel Navarro-Alarcón, Triana Bergillos-Meca, Rafael Giménez-Martínez, Silvia Sánchez-Hernández, Manuel Olalla-Herrera
The benefits of goat milk, fermented milks, and probiotics for the humans are well documented. In this study, a novel fermented goat milk was manufactured with the putative probiotic strain Lactobacillus plantarum C4 together with L. bulgaricus and Streptococcus thermophilus . Ultrafiltration was chosen as the skimmed milk concentration method because it produced the best viscosity and syneresis and a high casein content. The viability rate of all bacterial strains was >10⁷ cfu/mL, even after 5 weeks of storage or after in vitro gastrointestinal digestion, which is especially important for exertion of the probiotic strain functionalities...
May 17, 2018: Nutrients
https://www.readbyqxmd.com/read/29772525/vaginal-microbiota-dysmicrobism-and-role-of-biofilm-forming-bacteria
#9
Giuseppina Campisciano, Nunzia Zanotta, Vincenzo Petix, Lucia Corich, Francesco De Seta, Manola Comar
Bacterial vaginosis involves the presence of a polymicrobial biofilm on the vaginal epithelium, guaranteeing immune escape and spread of antibiotic resistance. To spot known biofilm-forming bacteria, we profiled the vaginal microbiome of sixty-four symptomatic women suffering from a different grade of vaginal disorders and sixty asymptomatic healthy women. Specific microbial profiles distinguished symptomatic from asymptomatic women and characterized the grade of dysmicrobism within the symptomatic group. Lactobacillus crispatus and iners predominated on the healthy vaginal mucosa, while Lactobacillus gasseri predominated in the intermediate dysmicrobism...
June 1, 2018: Frontiers in Bioscience (Elite Edition)
https://www.readbyqxmd.com/read/29772328/current-evidence-on-management-of-aortic-stent-graft-infection-a-systematic-review-and-meta-analysis
#10
REVIEW
Hai Lei Li, Yiu Che Chan, Stephen W Cheng
OBJECTIVE: Aortic stent-graft infection is rare, but remains one of the most challenging and threatening complications. This systematic review aimed to identify the clinical features, treatment and outcomes of endograft infection after abdominal endovascular aortic repair (EVAR) and thoracic endovascular aortic repair (TEVAR). METHODS: A systematic literature review of all published literature from January 1991 to September 2016 on stent-graft infection was performed under the instruction of Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA)...
May 14, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29772041/endophthalmitis-associated-with-intravitreal-injections-of-anti-vegf-agents-at-a-tertiary-referral-center-in-house-and-referred-cases
#11
Nicolas A Yannuzzi, Ninel Z Gregori, Philip J Rosenfeld, Nidhi Relhan, Nimesh A Patel, Nancy Si, Darlene Miller, Sander R Dubovy, William E Smiddy, Stephen G Schwartz, Harry W Flynn
BACKGROUND AND OBJECTIVE: To report the incidence rates, causative organisms, and visual acuity (VA) outcomes in patients with endophthalmitis associated with intravitreal injection of anti-vascular endothelial growth factor inhibitors. PATIENTS AND METHODS: Retrospective case series between 2005 and 2017. RESULTS: The study included 39 eyes of 39 patients, including 27 (69%) referred and 12 (31%) institutional patients. The use of topical antibiotics after an injection was gradually phased out at the authors' institution, where the preinjection rate of all clinically suspected endophthalmitis was 0...
May 1, 2018: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/29771975/development-and-characterization-of-an-oral-multispecies-biofilm-implant-flow-chamber-model
#12
Nadine Kommerein, Katharina Doll, Nico S Stumpp, Meike Stiesch
Peri-implant infections are the most common cause of implant failure in modern dental implantology. These are caused by the formation of biofilms on the implant surface and consist of oral commensal and pathogenic bacteria, which harm adjacent soft and hard tissues and may ultimately lead to implant loss. In order to improve the clinical situation, there has to be a better understanding of biofilm formation on abiotic surfaces. Therefore, we successfully developed a system to cultivate an oral multispecies biofilm model in a flow chamber system, optimized for the evaluation of biofilm formation on solid materials by direct microscopic investigation...
2018: PloS One
https://www.readbyqxmd.com/read/29771345/sucrose-metabolism-alters-lactobacillus-plantarum-survival-and-interactions-with-the-microbiota-in-the-digestive-tract
#13
Xiaochen Yin, Dustin D Heeney, Yanin Tab Srisengfa, Shin-Yu Chen, Carolyn M Slupsky, Maria L Marco
We investigated whether sucrose metabolism by probiotic Lactobacillus plantarum influences the intestinal survival and microbial responses to this organism when administered to mice fed a sucrose-rich, Western diet. A L. plantarum mutant unable to metabolize sucrose was constructed by deleting scrB, coding for beta-fructofuranosidase, in a rifampicin-resistant strain of L. plantarum NCIMB8826. The ScrB deficient mutant survived in 8-fold higher numbers compared to the wild-type strain when measured 24 h after administration on two consecutive days...
May 16, 2018: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/29771255/return-of-the-tetracyclines-omadacycline-a-novel-aminomethylcycline-antimicrobial
#14
J C Cho, L M Childs-Kean, M T Zmarlicka, M P Crotty
Omadacycline is a novel aminomethylcycline antimicrobial agent that is available in both oral and intravenous formulations. The distinguishing structural characteristics of omadacycline from other tetracyclines allow for its continued antimicrobial activity in the presence of traditional tetracycline resistance mechanisms (efflux pumps and ribosomal protection proteins). Omadacycline has been found to have potent activity against antibiotic-resistant pathogens including methicillin-resistant Staphylococcus aureus, vancomycin-resistant Enterococcus, extended spectrum beta-lactamase-producing Escherichia coli and multidrug-resistant Streptococcus pneumoniae...
March 2018: Drugs of Today
https://www.readbyqxmd.com/read/29770902/high-isolation-rate-and-multidrug-resistance-tendency-of-penicillin-susceptible-group-b-streptococcus-with-reduced-ceftibuten-susceptibility-in-japan
#15
Hirotsugu Banno, Kouji Kimura, Tomomi Seki, Wanchun Jin, Jun-Ichi Wachino, Keiko Yamada, Noriyuki Nagano, Yoshichika Arakawa
Group B Streptococcus (GBS) clinical isolates with reduced penicillin susceptibility (PRGBS) have emerged through acquisition of amino acid substitutions in penicillin-binding protein 2X (PBP2X). Moreover, we also reported the emergence of penicillin-susceptible GBS clinical isolates with reduced ceftibuten susceptibility (CTBr PSGBS) due to amino acid substitutions in PBPs. However, whether or not these amino acid substitutions are responsible for the reduced ceftibuten susceptibility (RCTBS) profile remains unclear...
May 17, 2018: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29769380/pneumococcal-metabolic-adaptation-and-colonization-are-regulated-by-the-two-component-regulatory-system-08
#16
Alejandro Gómez-Mejia, Gustavo Gámez, Stephanie Hirschmann, Viktor Kluger, Hermann Rath, Sebastian Böhm, Franziska Voss, Niamatullah Kakar, Lothar Petruschka, Uwe Völker, Reinhold Brückner, Ulrike Mäder, Sven Hammerschmidt
Streptococcus pneumoniae two-component regulatory systems (TCS) enable adaptation and ensure its maintenance in host environments. This study deciphers the impact of TCS08 on pneumococcal gene expression and its role in metabolic and pathophysiological processes. Transcriptome analysis and real-time PCR demonstrated a regulatory effect of TCS08 on genes involved mainly in environmental information processing, intermediary metabolism, and colonization by S. pneumoniae D39 and TIGR4. Striking examples are genes for fatty acid biosynthesis, genes of the arginine deiminase system, and the psa operon encoding the manganese ABC transport system...
June 27, 2018: MSphere
https://www.readbyqxmd.com/read/29769163/dauricine-combined-with-clindamycin-inhibits-severe-pneumonia-co-infected-by-influenza-virus-h5n1-and-streptococcus-pneumoniae-in-vitro-and-in-vivo-through-nf-%C3%AE%C2%BAb-signaling-pathway
#17
Hui Li, Xin Chen, Shu-Jun Zhou
Dauricine, isolated from Menispermum dauricum, has been widely used for treatment of various diseases, including cardiac ischemia and inflammation-related diseases. However, little is known regarding to the effect of dauricine on severe pneumonia. Therefore, the aim was to investigate the effect of dauricine on severe pneumonia and its mechanism during progress. Herein, H5N1 and Streptococcus pneumoniae (D39) were conducted to induce severe pneumonia in both BEAS-2B cells and mice. In vitro, dauricine reversed the protein and mRNA expressions of TNF-α, IL-6 and IL-1β, examined by ELISA and qRT-PCR assay, respectively...
April 19, 2018: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/29768525/effects-of-a-food-enriched-with-probiotics-on-streptococcus-mutans-and-lactobacillus-spp-salivary-counts-in-preschool-children-a-cluster-randomized-trial
#18
Judy Villavicencio, Lina Maria Villegas, Maria Cristina Arango, Susana Arias, Francia Triana
Probiotics have provided benefits to general health, but they are still insufficient to dental health. This study aimed to evaluate milk supplemented with probiotic bacteria and standard milk, measured by levels of Streptococcus mutans (S. mutans) and Lactobacillus spp., in 3-4-year-old children after 9 months of intervention. The study was a triple-blind, placebo-controlled, randomized trial. The sample was composed of 363 preschoolers attending five child development centers in Cali, Colombia. They were randomized to two groups: children in the intervention group drank 200 mL of milk with Lactobacillus rhamnosus 5x106 and Bifidobacteruim longum 3x106, and children in the control group drank 200 mL of standard milk...
May 14, 2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29768437/oral-health-status-in-historic-population-macroscopic-and-metagenomic-evidence
#19
Claire Willmann, Xavier Mata, Kristian Hanghoej, Laure Tonasso, Lenka Tisseyre, Céline Jeziorski, Elodie Cabot, Pierre Chevet, Eric Crubézy, Ludovic Orlando, Rémi Esclassan, Catherine Thèves
Recent developments in High-Throughput DNA sequencing (HTS) technologies and ancient DNA (aDNA) research have opened access to the characterization of the microbial communities within past populations. Most studies have, however, relied on the analysis of dental calculus as one particular material type particularly prone to the molecular preservation of ancient microbial biofilms and potential of entire teeth for microbial characterization, both of healthy communities and pathogens in ancient individuals, remains overlooked...
2018: PloS One
https://www.readbyqxmd.com/read/29768222/green-synthesis-of-silver-nanoparticles-using-flower-extract-of-malva-sylvestris-and-investigation-of-their-antibacterial-activity
#20
Hassan Mahmoodi Esfanddarani, Abolghasem Abbasi Kajani, Abdol-Khalegh Bordbar
High-quality colloidal silver nanoparticles (AgNP) were synthesised via a green approach by using hydroalcoholic extracts of Malva sylvestris . Silver nitrate was used as a substrate ion while the plant extract successfully played the role of reducing and stabilising agents. The synthesised nanoparticles were carefully characterised by using transmission electron microscopy, atomic-force microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy and UV-vis spectroscopy. The maximum absorption wavelengths of the colloidal solutions synthesised using 70 and 96% ethanol and 100% methanol, as extraction solvents, were 430, 485 and 504 nm, respectively...
June 2018: IET Nanobiotechnology
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