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https://www.readbyqxmd.com/read/29241184/peritonitis-in-children-on-chronic-peritoneal-dialysis-the-experience-of-a-large-national-pediatric-cohort
#1
Daniela Ponce, Thyago Proença de Moraes, Roberto Pecoits-Filho, Ana Elizabeth Figueiredo, Pasqual Barretti
BACKGROUND: We performed this study to evaluate the incidence, risk factors, microbiology, treatment, and outcome of peritonitis in pediatric Peritoneal dialysis (PD) patients at a nationwide prospective study. METHODOLOGY: Patients younger than 18 years recruited in the BRAZPD II study from 2004 to 2011, who presented their first peritonitis episode, were included in the study. RESULTS: We found 125 first episodes of peritonitis in 491 children PD patients (0...
December 14, 2017: Blood Purification
https://www.readbyqxmd.com/read/29240916/study-on-the-anti-endotoxin-effect-of-sinomenine-using-an-agilent-genome-array
#2
Yiyi Hu, Bin Li, Libin Wen, Kongwang He
Background: Endotoxin is a significant contributing factor underlying the occurrence of fever, diarrhea, inflammation, edema, coagulation, shock, and other syndromes associated with Gram-negative bacterial infections. To date, there is no effective treatment for endotoxemia. Aim: The aim of this study was to characterize differentially expressed genes in sinomenine-treated and LPS-induced endothelial cells by microarray analysis, and to determine the potential pharmacological activity of sinomenine...
December 12, 2017: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/29240776/microbiological-profile-and-risk-factors-for-in-hospital-mortality-of-infective-endocarditis-in-tertiary-care-hospitals-of-south-vietnam
#3
Hoang M Tran, Vien T Truong, Tam M N Ngo, Quoc P V Bui, Hoang C Nguyen, Trung T Q Le, Wojciech Mazur, Eugene Chung, John M Cafardi, Khanh P N Pham, Hoang H N Duong, Thach Nguyen, Vu T Nguyen, Vinh N Pham
OBJECTIVES: We aimed to evaluate the microbiological characteristics and risk factors for mortality of infective endocarditis in two tertiary hospitals in Ho Chi Minh City, south Vietnam. MATERIALS AND METHODS: A retrospective study of 189 patients (120 men, 69 women; mean age 38 ± 18 years) with the diagnosis of probable or definite infective endocarditis (IE) according to the modified Duke Criteria admitted to The Heart Institute or Tam Duc Hospital between January 2005 and December 2014...
2017: PloS One
https://www.readbyqxmd.com/read/29240645/resveratrol-downregulates-biomarkers-of-sepsis-via-inhibition-of-proteasome-s-proteases
#4
Neerupma Silswal, Nidhi S Reddy, Asaf A Qureshi, Nilofer Qureshi
LPS is the main agonist of Gram-negative bacteria and initiates inflammation. We recently reported that plasmas from sepsis patients revealed increased levels of following group of biomarkers; VCAM-1, ICAM1, CRP, resistin, and proteasome LMP subunits. Our objective here was to compare effects of resveratrol (shown to be a non-specific proteasome inhibitor by us) and a known LMP7 inhibitor (ONX-0914, specific inhibitor) on proteasome's activities, as well as on inflammatory markers mentioned above in human blood monocytes...
December 13, 2017: Shock
https://www.readbyqxmd.com/read/29240272/amino-acid-deprivation-and-central-carbon-metabolism-regulate-the-production-of-outer-membrane-vesicles-and-tubes-by-francisella
#5
Vinaya Sampath, William D McCaig, David G Thanassi
Francisella tularensis is a highly virulent Gram-negative bacterial pathogen that causes the zoonotic disease tularemia. F. novicida, a model tularemia strain, produces spherical outer membrane vesicles (OMV), as well as novel tubular vesicles and extensions of the cell surface. These OMV and tubes (OMV/T) are produced in a regulated manner and contain known virulence factors. Mechanisms by which bacterial vesicles are produced and regulated are not well understood. We performed a genetic screen in F. novicida to decipher the molecular basis for regulated OMV/T formation, and identified both hypo- and hyper-vesiculating mutants...
December 14, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/29239890/omega-3-decreases-interleukin-6-levels-in-hiv-and-hhv-8-co-infected-patients-results-from-a-randomized-supplementation-trial-in-uganda
#6
Anna E Coghill, Jeanette M Schenk, Zeina Mahkoul, Jackson Orem, Warren Phipps, Corey Casper
OBJECTIVE: Kaposi sarcoma (KS) is an HIV-associated malignancy caused by human herpesvirus-8 that occurs at highest incidence in sub-Saharan Africa. KS patients often present with inflammatory symptoms associated with higher mortality. DESIGN: We conducted a double-blind, randomized, placebo-controlled study in Uganda to test whether omega-3 (ω-3) supplementation could reduce inflammation in HIV and HHV-8 co-infected adults ≥ 18 years of age. Patients with acute illness, AIDS, or advanced KS were ineligible, as were pregnant women...
December 12, 2017: AIDS
https://www.readbyqxmd.com/read/29239831/factors-associated-with-in-hospital-mortality-among-critically-ill-surgical-patients-with-multidrug-resistant-gram-negative-infections
#7
Andrew S Jarrell, Rachel M Kruer, Loredana Diana Berescu, Peter J Pronovost, Julie B Trivedi
PURPOSE: Multidrug-resistant (MDR) Gram-negative infection increases risk of mortality, other complications, and costs. The objective of this study was to determine the prevalence of and identify factors associated with in-hospital mortality among critically ill surgical patients. MATERIALS AND METHODS: This case-control study included critically ill surgical patients from 2011 to 2014 who had a carbapenem-resistant Enterobacteriaceae (CRE), MDR P. aeruginosa, or MDR Acinetobacter spp...
November 24, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/29239717/niveispirillum-lacus-sp-nov-isolated-from-cyanobacterial-aggregates-in-a-eutrophic-lake
#8
Haiyuan Cai, Henglin Cui, Yonghui Zeng, Yanan Wang, Helong Jiang
A bacterial strain, 1-14T, was isolated from cyanobacterial aggregates in a eutrophic lake, Taihu Lake, China. Cells were observed to be slightly curved, rod-shaped, aerobic and Gram-stain-negative. Optimal growth occurred at pH 7.0 (range: 5.0-9.0), 28 °C (range: 20-32 °C) and 0 % (w/v) NaCl (range: 0-1.0 %) in R2A broth. No growth is observed at 37 °C. The cells were found to be positive for oxidase and catalase activities. The major respiratory quinone was ubiquinone Q-10. The major fatty acids (>10 %) were identified as C18 : 1ω6c/C18 : 1ω7c, C16 : 0 3-OH and C18 : 1 2-OH...
December 14, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29239716/pseudomonas-fluvialis-sp-nov-a-novel-member-of-the-genus-pseudomonas-isolated-from-the-river-ganges-india
#9
Sarabjeet Kour Sudan, Deepika Pal, Bhawana Bisht, Narender Kumar, Vasvi Chaudhry, Prabhu Patil, Girish Sahni, Shanmugam Mayilraj, Srinivasan Krishnamurthi
A bacterial strain, designated ASS-1T, was isolated and identified from a sediment sample of the river Ganges, Allahabad, India. The strain was Gram-stain-negative, formed straw-yellow pigmented colonies, was strictly aerobic, motile with a single polar flagellum, and positive for oxidase and catalase. The major fatty acids were C16 : 1ω7c/ 16 : 1 C16 : 1ω6c, C18 : 1ω7c and C16 : 0. Sequence analysis based on the 16S rRNA gene revealed that strain ASS-1T showed high similarity to Pseudomonas guguanensis CC-G9AT (98...
December 14, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29239018/design-synthesis-and-biological-evaluation-of-1-ethyl-3-thiazol-2-yl-urea-derivatives-as-escherichia-coli-dna-gyrase-inhibitors
#10
Tihomir Tomašič, Michaela Barančoková, Nace Zidar, Janez Ilaš, Päivi Tammela, Danijel Kikelj
Discovery of novel DNA gyrase B inhibitors remains an attractive field in the search for new antibacterial drugs to overcome the known bacterial resistance mechanisms. In the present study, we designed and synthesized novel ethylurea derivatives of 4,5,6,7-tetrahydrobenzo[1,2-d]thiazole-2,6-diamine, 2-(2-aminothiazol-4-yl)acetic acid, and benzo[1,2-d]thiazole-2,6-diamine and evaluated their Escherichia coli DNA gyrase inhibition. The most potent DNA gyrase inhibitors in the prepared library of compounds were benzo[1,2-d]thiazoles 32-34, 36, and 37 with IC50 values in the low micromolar range...
December 14, 2017: Archiv der Pharmazie
https://www.readbyqxmd.com/read/29238962/population-pharmacokinetics-of-polymyxin-b
#11
Pooja Manchandani, Visanu Thamlikitkul, Yanina Dubrovskaya, Jessica T Babic, David C Lye, Lawrence S Lee, Vincent H Tam
Polymyxin B is used as a last treatment resort for multidrug-resistant Gram-negative bacterial infections. The objectives of this study were to examine the population pharmacokinetics of polymyxin B and investigate factor(s) influencing pharmacokinetic variability. Four serial blood samples each were collected from 35 adult patients at steady state. The concentrations of individual polymyxin B components were analyzed using a validated LCMS/MS assay and combined to derive total concentrations. A maximum likelihood expectation maximization approach was used to fit the data...
December 14, 2017: Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29238856/anti-endotoxin-mechanism-of-the-kw4-peptide-in-inflammation-in-raw-264-7-cells-induced-by-lta-and-drug-resistant-staphylococcus-aureus-1630
#12
Jong-Kook Lee, Yoonkyung Park
Drug-resistant microorganism infections cause serious disease and can lead to mortality and morbidity. In particular, Staphylococcus aureus induces pyrogenic and toxigenic infections, and drug-resistance occurs rapidly. Multidrug-resistant S. aureus, such as methicillin-resistant S. aureus and methicillin-sensitive S. aureus, can also cause immunodeficiency and immune deficiency syndrome from lipoteichoic acid. However, antimicrobial peptides, such as KW4, have strong antimicrobial activity, low cytotoxicity, and high neutralization activity against endotoxin substances from Gram-negative bacteria...
December 13, 2017: Amino Acids
https://www.readbyqxmd.com/read/29238621/burkholderia-aortic-aneurysm-a-case-report-and-review-of-the-literature
#13
Sreelakshmi Panginikkod, Aishwarya Ramachandran, Pratyusha Bollimunta, Roshanak Habibi, Roshan Kumar Arjal, Venu Gopalakrishnan
Melioidosis is a frequently fatal infection caused by the Gram-negative bacillus Burkholderia pseudomallei endemic to Southeast Asia and Northern Australia. It is a rare imported pathogen in the United States and is a potential bioterror agent. We report the case of an 82-year-old previously healthy man who presented with 2 weeks of fever and epigastric pain after he returned from the Philippines. A diagnosis of nondissecting mycotic aneurysm in the descending thoracic aorta was made with the help of CT angiogram and positive blood cultures...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/29238480/maternal-recto-vaginal-colonization-in-term-and-preterm-deliveries
#14
Mostafa Javanian, Zahra Akbarian Rad, Mohsen Haghshenas Mojaveri, Azita Ghanbarpour Shiadeh, Soheil Ebrahimpour
Background and aim: Maternal recto-vaginal organisms are the main cause of early-onset sepsis in neonates. The aim of this study was to determine the most common organisms and compare maternal recto-vaginal colonization in term and preterm delivery. Methods: This cross-sectional study was done from October 2014 through October 2016 among participants referred to Ayatollah Rouhani Hospital in Babol, Northern Iran. All pregnant women within gestational age (GA) ≥ 26 weeks and labor pain were included in this study...
October 2017: Electronic Physician
https://www.readbyqxmd.com/read/29238460/synthetic-peptides-mimicking-lipopolysaccharide-as-a-potential-vaccine-candidates-against-vibrio-cholerae-serogroup-o1
#15
Fatemeh Mohammad Pour Ghazi, Seyed Latif Mousavi Gargari
Background and Objectives: Cholera is a life-threatening diarrhea caused mainly by Gram-negative marine habitant Vibrio cholerae serogroup O1. Cholera vaccination is limited mainly to developed countries, due to the cumbersome and expensive task of vaccine production. In the present work, the aim was to study the immunogenicity of the synthetic mimotopes through two different routes of injection and oral administration. Lipopolysaccharide (LPS) is one of the immunogenic components in Gram-negative bacteria, which cannot be used as a vaccine candidate, due to its high toxic effect...
August 2017: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/29238332/application-of-flp-frt-system-to-construct-unmarked-deletion-in-helicobacter-pylori-and-functional-study-of-gene-hp0788-in-pathogenesis
#16
Xiaofei Ji, Ying Wang, Jiaojiao Li, Qianyu Rong, Xingxing Chen, Ying Zhang, Xiaoning Liu, Boqing Li, Huilin Zhao
Helicobacter pylori is a Gram-negative, microaerophilic bacterium associated with human gastric diseases. Further investigations on virulence genes are still required to clarify the pathogenic mechanism of H. pylori and the heterogeneous problem of infection. In order to develop an efficient and accurate method to study gene functions in H. pylori pathogenesis, an unmarked deletion method for both a single gene and a large fragment was established based on the FLP-FRT recombination system. Using this method, the gene hp0788, encoding an outer membrane protein (HofF), was deleted...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29238328/impact-of-aerosol-dust-on-xmap-multiplex-detection-of-different-class-pathogens
#17
Denis A Kleymenov, Vladimir A Gushchin, Alexander L Gintsburg, Artem P Tkachuk
Environmental or city-scale bioaerosol surveillance can provide additional value for biodefense and public health. Efficient bioaerosol monitoring should rely on multiplex systems capable of detecting a wide range of biologically hazardous components potentially present in air (bacteria, viruses, toxins and allergens). xMAP technology from LuminexTM allows multiplex bead-based detection of antigens or nucleic acids, but its use for simultaneous detection of different classes of pathogens (bacteria, virus, toxin) is questionable...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29238275/13c-assisted-metabolic-flux-analysis-to-investigate-heterotrophic-and-mixotrophic-metabolism-in-cupriavidus-necator-h16
#18
Swathi Alagesan, Nigel P Minton, Naglis Malys
Introduction: Cupriavidus necator H16 is a gram-negative bacterium, capable of lithoautotrophic growth by utilizing hydrogen as an energy source and fixing carbon dioxide (CO2) through Calvin-Benson-Bassham (CBB) cycle. The potential to utilize synthesis gas (Syngas) and the prospects of rerouting carbon from polyhydroxybutyrate synthesis to value-added compounds makes C. necator an excellent chassis for industrial application. Objectives: In the context of lack of sufficient quantitative information of the metabolic pathways and to advance in rational metabolic engineering for optimized product synthesis in C...
2018: Metabolomics: Official Journal of the Metabolomic Society
https://www.readbyqxmd.com/read/29238212/effects-of-an-antimicrobial-restriction-system-on-appropriate-carbapenem-use-in-a-hospital-without-infectious-diseases-consultation
#19
Warangkhana Wanla, Wasan Katip, Sakon Supakul, Porntipa Apiwatnakorn, Sompong Khamsarn
Background: Gram-negative bacteria are becoming increasingly resistant to carbapenems and are related to the use of carbapenems. Thus, the main objective of this study was to compare the appropriateness of prescribing carbapenem before and after using an antimicrobial restriction system without infectious diseases consultation. Materials and methods: A retrospective cross-sectional before and after study was conducted in Lamphun Hospital to limit the prescription of carbapenems...
2017: International Journal of General Medicine
https://www.readbyqxmd.com/read/29237787/point-counterpoint-piperacillin-tazobactam-should-be-used-to-treat-infections-with-esbl-positive-organisms
#20
Audrey Schuetz, Sergio Reyes Salcedo, Pranita D Tamma
Beta-lactam/beta-lactamase inhibitor combinations (BLBLIs) are among the most controversial classes of antibiotic agents available for the treatment of infections caused by extended-spectrum beta-lactamase (ESBL)-producing Gram-negative bacteria (ESBL-GNR). Piperacillin-tazobactam (PTZ) is one of the most frequently utilized antibiotic agents for empiric gram-negative bacterial coverage and remains active against a large proportion of ESBL-GNR. Furthermore, good antimicrobial stewardship practices encourage the use of carbapenem-sparing treatment regimens for infections due to ESBL-GNR...
December 13, 2017: Journal of Clinical Microbiology
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