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https://www.readbyqxmd.com/read/29150374/occurrence-of-enterobacter-hormaechei-carrying-blandm-1-and-blakpc-2-in-china
#1
Biwei Yang, Yu Feng, Alan McNally, Zhiyong Zong
Three carbapenem-resistant clinical isolates of the Enterobacter cloacae complex (ECC) were recovered from different patients in a hospital. All 3 isolates carried 2 carbapenemase genes blaKPC-2 and blaNDM-1. A study was performed to characterize their relatedness and to investigate possible links among the patients. Whole genome sequencing revealed that the isolates were Enterobacter hormaechei and belonged to ST177 of the ECC. There were 19-142 single nucleotide polymorphisms (SNPs) between the isolates, suggesting that the isolates were likely from a central reservoir, which might have existed for some time...
October 19, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29150269/potential-role-of-the-virchow-robin-space-in-the-pathogenesis-of-bacterial-meningitis
#2
Patrick Chan, Denis J Meerdink, James A Uchizono
Meningitis is an infectious disease commonly arising from a bacterial etiology. The rapid progression of morbidity and mortality due to bacterial meningitis requires critical and imminent time-dependent clinical intervention. Although it is unambiguously clear that bacteria must infiltrate the cerebrospinal fluid, the sequence of events in the pathogenesis of bacterial meningitis has not been fully elucidated. Most reviews of the pathogenesis of bacterial meningitis do not specify the anatomical location of bacteria following BBB traversal...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29150155/the-association-of-functional-capacity-with-right-atrial-deformation-in-patients-with-pulmonary-arterial-hypertension-a-study-with-two-dimensional-speckle-tracking
#3
Weiwei Liu, Yueheng Wang, Jinling Zhou, Hui Bai, Feng Wang, Ju Wang
BACKGROUND: The purpose of this study was to assess right atrial (RA) myocardial mechanics in pulmonary hypertension (PH) patients using two-dimensional speckle tracking (2D-STE), and define the relationship between RA function and exercise capacity in PH patients. METHODS: Thirty-eight consecutive PH patients were studied and compared with a control group of 25 healthy volunteers. Peak atrial longitudinal strain (PALS), RA strain rate were measured in all subjects...
April 13, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29149675/evaluation-of-potassium-ferrate-as-an-alternative-disinfectant-on-cyanobacteria-inactivation-and-associated-toxin-fate-in-various-waters
#4
Jiajia Fan, Bo-Hung Lin, Che-Wei Chang, Yuqing Zhang, Tsair-Fuh Lin
Potassium ferrate (K2FeO4) is an effective oxidant that may be used as a pre- or post-oxidant in the purification of source water with cyanobacterial issues. To provide a better basis for the application of this oxidant during water treatment processes, the impacts of K2FeO4 on the cell viability of Microcystis aeruginosa and the fate of associated microcystins (MCs) were investigated in various water matrices. The results showed that a water matrix can significantly affect the effectiveness of K2FeO4 on cyanobacteria inactivation...
November 9, 2017: Water Research
https://www.readbyqxmd.com/read/29149554/boron-dissolved-and-dust-atmospheric-inputs-to-a-forest-ecosystem-northeastern-france
#5
Philippe Roux, Marie Pierre Turpault, Gil Kirchen, Paul-Olivier Redon, Damien Lemarchand
Boron concentrations and isotopic compositions of atmospheric dust and dissolved depositions were monitored over a two-years period (2012-2013) in the forest ecosystem of Montiers (Northeastern France). This time series allows the determination of the boron atmospheric inputs to this forest ecosystem and contributes to refine our understanding of the sources and processes that control the boron atmospheric cycle. Mean annual dust and dissolved boron atmospheric depositions are comparable in size (13 g.ha-1...
November 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29149229/van-t-hoff-s-law-for-active-suspensions-the-role-of-the-solvent-chemical-potential
#6
Jeroen Rodenburg, Marjolein Dijkstra, René van Roij
We extend Van't Hoff's law for the osmotic pressure to a suspension of active Brownian particles. The propelled particles exert a net reaction force on the solvent, and thereby either drive a measurable solvent flow from the connecting solvent reservoir through the semipermeable membrane, or increase the osmotic pressure and cause the suspension to rise to heights as large as micrometers for experimentally realized microswimmers described in the literature. The increase in osmotic pressure is caused by the background solvent being, in contrast to passive suspensions, no longer at the chemical potential of the solvent reservoir...
November 17, 2017: Soft Matter
https://www.readbyqxmd.com/read/29149215/longitudinal-survey-of-two-serotine-bat-eptesicus-serotinus-maternity-colonies-exposed-to-eblv-1-european-bat-lyssavirus-type-1-assessment-of-survival-and-serological-status-variations-using-capture-recapture-models
#7
Emmanuelle Robardet, Christophe Borel, Marie Moinet, Dorothée Jouan, Marine Wasniewski, Jacques Barrat, Franck Boué, Elodie Montchâtre-Leroy, Alexandre Servat, Olivier Gimenez, Florence Cliquet, Evelyne Picard-Meyer
This study describes two longitudinal serological surveys of European Bat Lyssavirus type 1 (EBLV-1) antibodies in serotine bat (Eptesicus serotinus) maternity colonies located in the North-East of France. This species is currently considered as the main EBLV-1 reservoir. Multievent capture-recapture models were used to determine the factors influencing bat rabies transmission as this method accounts for imperfect detection and uncertainty in disease states. Considering the period of study, analyses revealed that survival and recapture probabilities were not affected by the serological status of individuals, confirming the capacity of bats to be exposed to lyssaviruses without dying...
November 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29149094/genomic-analysis-of-third-generation-cephalosporin-resistant-escherichia-coli-from-dairy-cow-manure
#8
Muhammad Attiq Rehman, Xianhua Yin, Dion Lepp, Chad Laing, Kim Ziebell, Guylaine Talbot, Edward Topp, Moussa Sory Diarra
The production of extended-spectrum β-lactamases (ESBLs) conferring resistance to new derivatives of β-lactams is a major public health threat if present in pathogenic Gram-negative bacteria. The objective of this study was to characterize ceftiofur (TIO)- or cefotaxime (FOX)-resistant Escherichia coli isolated from dairy cow manure. Twenty-four manure samples were collected from four farms and incubated under anaerobic conditions for 20 weeks at 4 °C or at 25 °C. A total of 37 TIO- or FOX-resistant E. coli were isolated from two of the four farms to determine their susceptibility to 14 antibiotics...
November 17, 2017: Veterinary Sciences
https://www.readbyqxmd.com/read/29148916/time-and-spatial-variability-in-the-concentrations-of-selected-metals-in-water-and-bottom-sediments-of-p%C3%A5-awniowice-and-dzier%C3%A5-no-ma%C3%A5-e-reservoirs-poland
#9
Rajmund Michalski, Maciej Kostecki, Joanna Kernert, Katarzyna Nocoń, Katarzyna Stahl, Zuzanna Bernaś, Michał Chrobok, Magdalena Jabłońska-Czapla
The migration of metals and metalloids between bottom sediments and water and the other way round is a complex process. Understanding those mechanisms is essential for recognizing transformations taking place in water reservoir ecosystems. The objective behind the following study was to define time and spatial correlations in the changes in total concentrations of selected elements (Cr, Zn, Co, Mn, Cu, Ni, Pb, As, Ba, Sb, Sr and V) in waters and bottom sediments from two water reservoirs located in Upper Silesia (Poland), i...
November 17, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29148877/characterization-and-horizontal-transfer-of-antimicrobial-resistance-genes-and-integrons-in-bacteria-isolated-from-cooked-meat-products-in-china
#10
Tao Yu, Xiaobing Jiang, Yu Liang, Yanping Zhu, Jinhe Tian, Hao Ying, Xuannian Wang, Lei Shi
The aim of this study was to investigate antimicrobial resistance and the presence and transferability of corresponding resistance genes and integrons in bacteria isolated from cooked meat samples in the People's Republic of China. A total of 150 isolates (22 species belonging to 15 genera) were isolated from 49 samples. Resistance of these isolates to antimicrobials was commonly observed; 42.7, 36.0, and 25.3% of the isolates were resistant to tetracycline, streptomycin, and ampicillin, respectively. Multidrug resistance was observed in 41 (27...
November 17, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/29148730/the-effect-of-different-treatment-technologies-on-the-fate-of-antibiotic-resistance-genes-and-class-1-integrons-when-residual-municipal-wastewater-solids-are-applied-to-soil
#11
Tucker Burch, Michael J Sadowsky, Timothy M LaPara
Residual wastewater solids are a significant reservoir of antibiotic resistance genes (ARGs). While treatment technologies can reduce ARG levels in residual wastewater solids, the effects of these technologies on ARGs in soil during subsequent land-application are unknown. In this study we investigated the use of numerous treatment technologies (air drying, aerobic digestion, mesophilic anaerobic digestion, thermophilic anaerobic digestion, pasteurization, and alkaline stabilization) on the fate of ARGs and class 1 integrons in wastewater solids-amended soil microcosms...
November 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29148379/characterization-of-streptococcus-pyogenes-from-animal-clinical-specimens-spain
#12
Ana Isabel Vela, Pilar Villalón, Juan Antonio Sáez-Nieto, Gema Chacón, Lucas Domínguez, José Francisco Fernández-Garayzábal
Streptococcus pyogenes appears to be almost exclusively restricted to humans, with few reports on isolation from animals. We provide a detailed characterization (emm typing, pulsed-field gel electrophoresis [PFGE], and multilocus sequence typing [MLST]) of 15 S. pyogenes isolates from animals associated with different clinical backgrounds. We also investigated erythromycin resistance mechanisms and phenotypes and virulence genes. We observed 2 emm types: emm12 (11 isolates) and emm77 (4 isolates). Similarly, we observed 2 genetic linages, sequence type (ST) 26 and ST63...
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29148373/mycobacterium-ulcerans-dna-in-bandicoot-excreta-in-buruli-ulcer-endemic-area-northern-queensland-australia
#13
Katharina Röltgen, Gerd Pluschke, Paul D R Johnson, Janet Fyfe
To identify potential reservoirs/vectors of Mycobacterium ulcerans in northern Queensland, Australia, we analyzed environmental samples collected from the Daintree River catchment area, to which Buruli ulcer is endemic, and adjacent coastal lowlands by species-specific PCR. We detected M. ulcerans DNA in soil, mosquitoes, and excreta of bandicoots, which are small terrestrial marsupials.
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29147090/detection-of-antibiotic-resistance-and-resistance-genes-in-enterococci-isolated-from-sucuk-a-traditional-turkish-dry-fermented-sausage
#14
Furkan Demirgül, Yasin Tuncer
The aim of this study was to isolate enterococci in Sucuk, a traditional Turkish dry-fermented sausage and to analyze isolates for their biodiversity, antibiotic resistance patterns and the presence of some antibiotic resistance genes. A total of 60 enterococci strains were isolated from 20 sucuk samples manufactured without using a starter culture and they were identified as E. faecium (73.3%), E. faecalis (11.7%), E. hirae (8.3%), E. durans (3.3%), E. mundtii (1.7%) and E. thailandicus (1.7%). Most of the strains were found resistant to rifampin (51...
2017: Korean Journal for Food Science of Animal Resources
https://www.readbyqxmd.com/read/29146917/flow-behavior-of-n2-huff-and-puff-process-for-enhanced-oil-recovery-in-tight-oil-reservoirs
#15
Teng Lu, Zhaomin Li, Jian Li, Dawei Hou, Dingyong Zhang
In the present work, the potential of N2 huff and puff process to enhance the recovery of tight oil reservoir was evaluated. N2 huff and puff experiments were performed in micromodels and cores to investigate the flow behaviors of different cycles. The results showed that, in the first cycle, N2 was dispersed in the oil, forming the foamy oil flow. In the second cycle, the dispersed gas bubbles gradually coalesced into the continuous gas phase. In the third cycle, N2 was produced in the form of continuous gas phase...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29145733/harnessing-novel-imaging-approaches-to-guide-hiv-prevention-and-cure-discoveries-a-national-institutes-of-health-and-global-hiv-vaccine-enterprise-2017-meeting-report
#16
Brigitte Elisabeth Sanders-Beer, Yegor Voronin, David McDonald, Anjali Singh
Advances in imaging technologies have greatly increased our understanding of cellular and molecular interactions in humans and their corresponding animal models of infectious diseases. In the HIV/SIV field, imaging has provided key insights into mucosal viral transmission, local and systemic virus spread, host-virus dynamics, and chronic inflammation/immune activation and the resultant immunopathology. Recent developments in imaging applications are yielding physical, spatial, and temporal measurements to enhance insight into biological functions and disease processes, while retaining important cellular, microenvironmental, organ and intact organism contextual details...
November 16, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/29145101/the-distribution-and-trends-of-persistent-organic-pollutants-and-mercury-in-marine-mammals-from-canada-s-eastern-arctic
#17
REVIEW
Tanya M Brown, Robie W Macdonald, Derek C G Muir, Robert J Letcher
Arctic contaminant research in the marine environment has focused on organohalogen compounds and mercury mainly because they are bioaccumulative, persistent and toxic. This review summarizes and discusses the patterns and trends of persistent organic pollutants (POPs) and mercury in ringed seals (Pusa hispida) and polar bears (Ursus maritimus) in the Eastern Canadian Arctic relative to the rest of the Canadian Arctic. The review provides explanations for these trends and looks at the implications of climate-related changes on contaminants in these marine mammals in a region that has been reviewed little...
November 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29145087/retention-performance-of-three-widely-used-spe-sorbents-for-the-extraction-of-perfluoroalkyl-substances-from-seawater
#18
Miroslav Brumovský, Jitka Bečanová, Pavlína Karásková, Luca Nizzetto
Some per- and polyfluoroalkyl substances (PFASs) have been detected ubiquitously in the environment. Owing to the polar character conferred by the presence of the carboxylic or sulfonic acid groups and their resistance to degradation, aquatic environments became their major reservoirs, including marine waters. The procedure of PFAS analysis in aqueous matrices consists usually of solid-phase extraction (SPE) followed by high-performance liquid chromatography coupled to tandem mass spectrometry. Moreover, passive sampling approach using various SPE sorbents may be applied...
November 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/29145080/comparing-the-efficacy-of-solid-and-magic-echo-refocusing-sequences-applications-to-1-h-nmr-echo-spectroscopy-of-shale-rock
#19
Gregory S Boutis, Ravinath Kausik
Quantitative evaluation of the solid and viscous components of unconventional shale rock, namely kerogen and bitumen, is important for understanding reservoir quality. Short transverse coherence times, due to strong (1)H-(1)H dipolar interactions, motivates the application of solid state refocusing pulse sequences that allow for investigating components of the free-induction decay that are otherwise obscured by instrumental effects such as probe ringdown. This work reports on static, wide-line (1)H spectroscopy of shale rock and their extracted components, which include kerogen and bitumen, by the application of solid echo and magic echo pulse sequences...
November 3, 2017: Solid State Nuclear Magnetic Resonance
https://www.readbyqxmd.com/read/29144421/paralytic-shellfish-toxins-and-cyanotoxins-in-the-mediterranean-new-data-from-sardinia-and-sicily-italy
#20
Antonella Lugliè, Maria Grazia Giacobbe, Elena Riccardi, Milena Bruno, Silvia Pigozzi, Maria Antonietta Mariani, Cecilia Teodora Satta, Daniela Stacca, Anna Maria Bazzoni, Tiziana Caddeo, Pasqualina Farina, Bachisio Mario Padedda, Silvia Pulina, Nicola Sechi, Anna Milandri
Harmful algal blooms represent a severe issue worldwide. They affect ecosystem functions and related services and goods, with consequences on human health and socio-economic activities. This study reports new data on paralytic shellfish toxins (PSTs) from Sardinia and Sicily (Italy), the largest Mediterranean islands where toxic events, mainly caused by Alexandrium species (Dinophyceae), have been ascertained in mussel farms since the 2000s. The toxicity of the A. minutum, A. tamarense and A. pacificum strains, established from the isolation of vegetative cells and resting cysts, was determined by high performance liquid chromatography (HPLC)...
November 16, 2017: Microorganisms
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