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https://www.readbyqxmd.com/read/27914156/-intratechal-chemotherapy-treatment-through-an-ommaya-reservoir-catheter-for-meningeal-carcinomatosis-a-single-centre-experience
#1
José Pedro Lavrador, Nuno Simas, Edson Oliveira, Manuel Herculano Carvalho
INTRODUCTION: Meningeal carcinomatosis is defined as tumour cells infiltration of leptomeninges and subarachnoid space. It is normally related with poor survival (2 - 5 months). The best multidisciplinary treatment for this condition is a matter of discussion. Patient's condition and the natural history of the disease should be considered in the decision making process. MATERIAL AND METHODS: Retrospective cohort analysis of patients submitted to Ommaya Reservoir placement due to systemic solid tumour meningeal carcinomatosis between 2006 and 2014...
August 2016: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/27912981/examining-the-association-between-surface-bioburden-and-frequently-touched-sites-in-intensive-care
#2
C E Adams, J Smith, V Watson, C Robertson, S J Dancer
BACKGROUND: Critical care patients are at increased risk of infection. Near-patient surfaces act as reservoirs of microbial soil, which may contain pathogens. AIM: To correlate soil levels with hand-touch frequency of near-patient sites in an intensive care unit (ICU). METHODS: Five sites around each bed in a 10-bed ICU were screened for total microbial soil (cfu/cm(2)) and Staphylococcus aureus every month for 10 months. Selected sites were infusion pump and cardiac monitor, left and right bedrails, and bed table...
November 13, 2016: Journal of Hospital Infection
https://www.readbyqxmd.com/read/27912143/coupling-of-helix-e-f-motion-with-the-o-nitrito-and-2-nitrovinyl-coordination-in-myoglobin
#3
Androulla Ioannou, Alexandra Lambrou, Vangelis Daskalakis, Eftychia Pinakoulaki
Myoglobin (Mb) is known to react slowly with nitirite to form the green pigment by NO2(-) cordination to the heme Fe in the O-binding nitrito (O1NO2) mode and to the heme 2-vinyl position. Nitrite is a powerful oxidizing agent and a biological reservoir for NO that has been implicated in a variety of aerobic biological systems. Accordingly, it is important to elucidate the nature and variety of NO2(-) reaction mechanisms with Mb. We have performed principal component analysis (PCA, or essential dynamics) on Molecular Dynamics trajectories of all MbNO2 coordination states to resolve the most important motions in the protein at 298K...
November 25, 2016: Biophysical Chemistry
https://www.readbyqxmd.com/read/27911822/urban-park-soil-microbiomes-are-a-rich-reservoir-of-natural-product-biosynthetic-diversity
#4
Zachary Charlop-Powers, Clara C Pregitzer, Christophe Lemetre, Melinda A Ternei, Jeffrey Maniko, Bradley M Hover, Paula Y Calle, Krista L McGuire, Jeanne Garbarino, Helen M Forgione, Sarah Charlop-Powers, Sean F Brady
Numerous therapeutically relevant small molecules have been identified from the screening of natural products (NPs) produced by environmental bacteria. These discovery efforts have principally focused on culturing bacteria from natural environments rich in biodiversity. We sought to assess the biosynthetic capacity of urban soil environments using a phylogenetic analysis of conserved NP biosynthetic genes amplified directly from DNA isolated from New York City park soils. By sequencing genes involved in the biosynthesis of nonribosomal peptides and polyketides, we found that urban park soil microbiomes are both rich in biosynthetic diversity and distinct from nonurban samples in their biosynthetic gene composition...
November 28, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27911694/seroprevalence-of-babesia-microti-in-individuals-with-lyme-disease
#5
Sabino R Curcio, Laurel P Tria, Azad L Gucwa
INTRODUCTION: Babesiosis is an emerging tick-borne disease (TBD) caused by Babesia microti, an intracellular parasite of red blood cells. Currently, it is the highest ranked pathogen transmitted by blood transfusion. Most healthy individuals infected with B. microti are asymptomatic, but may be at risk for chronic infection. Similar to Lyme disease transmitted by Borrelia burgdorferi, B. microti is spread by Ixodes scapularis ticks. The rate of coinfection with these TBDs in humans is unclear as most studies have focused their prevalence in ticks or rodent reservoirs...
December 2016: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/27911051/sylvatic-transmission-of-trypanosoma-cruzi-among-domestic-and-wildlife-reservoirs-in-texas-usa-a-review-of-the-historical-literature
#6
REVIEW
S M Gunter, E L Brown, R Gorchakov, K O Murray, M N Garcia
Chagas disease (Trypanosoma cruzi infection) is one of the most important neglected tropical diseases affecting the Americas. The transmission dynamic of this parasite is a complicated process that involves three genera of Triatominae subfamily and over 100 known mammalian reservoirs composed of domestic, peridomestic and wildlife species. Understanding the complex relationship between vector species and mammalian hosts is important for preventing transmission to humans. We performed a historical literature review to assess the disease burden in the Texas wildlife and domestic animal population...
December 2, 2016: Zoonoses and Public Health
https://www.readbyqxmd.com/read/27911040/retrospective-study-evaluating-seroprevalence-of-hepatitis-e-virus-in-blood-donors-and-in-swine-veterinarians-in-italy-2004
#7
L De Sabato, I Di Bartolo, E Montomoli, C Trombetta, F M Ruggeri, F Ostanello
Hepatitis E is an emerging viral disease in developed countries, with sporadic cases occasionally linked to the consumption of raw or undercooked pork, wild boar or deer meat. Cases due to transfusion or transplantation have also been reported. In developed countries, hepatitis E is considered a zoonosis and pig is the main reservoir. In the last few years, several studies conducted in Europe reported variable seroprevalence rates among the general population, ranging between 0.26% and 52.5%. A higher seroprevalence was described among workers who come in contact with pigs...
December 2, 2016: Zoonoses and Public Health
https://www.readbyqxmd.com/read/27911034/improved-li-storage-through-homogeneous-n-doping-within-highly-branched-tubular-graphitic-foam
#8
Jinyang Dong, Yanming Xue, Chao Zhang, Qunhong Weng, Pengcheng Dai, Yijun Yang, Min Zhou, Cuiling Li, Qiuhong Cui, Xiaohong Kang, Chengchun Tang, Yoshio Bando, Dmitri Golberg, Xi Wang
A novel carbon structure, highly branched homogeneous-N-doped graphitic (BNG) tubular foam, is designed via a novel N, N-dimethylformamide (DMF)-mediated chemical vapor deposition method. More structural defects are found at the branched portions as compared with the flat tube domains providing abundant active sites and spacious reservoirs for Li(+) storage. An individual BNG branch nanobattery is constructed and tested using in situ transmission electron microscopy and the lithiation process is directly visualized in real time...
December 2, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27909433/sponge-microbiota-are-a-reservoir-of-functional-antibiotic-resistance-genes
#9
Dennis Versluis, Mari Rodriguez de Evgrafov, Morten O A Sommer, Detmer Sipkema, Hauke Smidt, Mark W J van Passel
Wide application of antibiotics has contributed to the evolution of multi-drug resistant human pathogens, resulting in poorer treatment outcomes for infections. In the marine environment, seawater samples have been investigated as a resistance reservoir; however, no studies have methodically examined sponges as a reservoir of antibiotic resistance. Sponges could be important in this respect because they often contain diverse microbial communities that have the capacity to produce bioactive metabolites. Here, we applied functional metagenomics to study the presence and diversity of functional resistance genes in the sponges Aplysina aerophoba, Petrosia ficiformis, and Corticium candelabrum...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27909425/thermodynamic-and-kinetic-response-of-microbial-reactions-to-high-co2
#10
Qusheng Jin, Matthew F Kirk
Geological carbon sequestration captures CO2 from industrial sources and stores the CO2 in subsurface reservoirs, a viable strategy for mitigating global climate change. In assessing the environmental impact of the strategy, a key question is how microbial reactions respond to the elevated CO2 concentration. This study uses biogeochemical modeling to explore the influence of CO2 on the thermodynamics and kinetics of common microbial reactions in subsurface environments, including syntrophic oxidation, iron reduction, sulfate reduction, and methanogenesis...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27907043/thermodynamic-simulation-of-carbonate-cements-water-carbon-dioxide-equilibrium-in-sandstone-for-prediction-of-precipitation-dissolution-of-carbonate-cements
#11
Yiping Duan, Mingshi Feng, Xinyan Zhong, Ruishu Shang, Lihong Huang
Carbonate cements, such as calcite, dolomite, ferrocalcite and ankerite, play important roles in the formation of pores in sandstones: precipitation of carbonate cements modifies pores and inhibits compaction, while dissolution creates secondary pores. This work proposed a precipitation-dissolution model for carbonate cements-CO2-H2O system by means of ion equilibrium concentration ([M2+], M = Ca, Mg, Fe or Mn) with different factors, such as temperature, depth, pH, [Formula: see text], variable rock composition and overpressure...
2016: PloS One
https://www.readbyqxmd.com/read/27905985/tlr7-8-agonist-induces-a-post-entry-samhd1-independent-block-to-hiv-1-infection-of-monocytes
#12
Henning Hofmann, Bénédicte Vanwalscappel, Nicolin Bloch, Nathaniel R Landau
BACKGROUND: Monocytes, the primary myeloid cell-type in peripheral blood, are resistant to HIV-1 infection as a result of the lentiviral restriction factor SAMHD1. Toll-like receptors recognize microbial pathogen components, inducing the expression of antiviral host proteins and proinflammatory cytokines. TLR agonists that mimic microbial ligands have been found to have activity against HIV-1 in macrophages. The induction of restriction factors in monocytes by TLR agonist activation has not been well studied...
December 1, 2016: Retrovirology
https://www.readbyqxmd.com/read/27905827/modeling-pn2-through-geological-time-implications-for-planetary-climates-and-atmospheric-biosignatures
#13
E E Stüeken, M A Kipp, M C Koehler, E W Schwieterman, B Johnson, R Buick
Nitrogen is a major nutrient for all life on Earth and could plausibly play a similar role in extraterrestrial biospheres. The major reservoir of nitrogen at Earth's surface is atmospheric N2, but recent studies have proposed that the size of this reservoir may have fluctuated significantly over the course of Earth's history with particularly low levels in the Neoarchean-presumably as a result of biological activity. We used a biogeochemical box model to test which conditions are necessary to cause large swings in atmospheric N2 pressure...
December 1, 2016: Astrobiology
https://www.readbyqxmd.com/read/27905624/-detection-of-the-meca-gene-in-coagulase-positive-staphylococcus-isolated-from-cats
#14
Nicolás Galarce, Loreto Muñoz, María Antonieta Jara, Paulo Lubí, Alejandra Sepúlveda, Sonia Anticevic
INTRODUCTION: Bacterial resistance is a global concern for public health. Reports of antimicrobial resistance, including that against methicillin, have increased in strains of coagulase positive Staphylococcus (CPS) isolated from pets, however in Chile this information is limited. OBJECTIVES: To determine the antimicrobial susceptibility profiles and to detect the mecA gene in CPS strains isolated from cats in Chile. MATERIALS AND METHODS: 134 samples were obtained from healthy cats and cats with skin lesions...
August 2016: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/27905620/-the-water-supply-of-a-pediatric-hospital-as-a-possible-source-of-an-outbreak-of-diarrhea-due-to-microsporidium-spp-in-immunocompromised-patients
#15
Paulina Coria, Claudia Urízar, Andrea Alba, Isabel Noemí, Anita Pino, José Luis Cerva
INTRODUCTION: The hospital water supply is a reservoir of a variety of potentially pathogenic microorganisms that can particularly affect children and immunocompromised patients. Potentially pathogenic Microsporidium spp. have been identified in water. Microsporidiosis is an emerging parasitic and opportunistic infection in immunocompromised patients. OBJECTIVE AND METHOD: to describe an outbreak of nosocomial diarrhea due to Microsporidium, species Encephalitozoon intestinalis...
August 2016: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/27905493/increased-temperature-delays-the-late-season-phenology-of-multivoltine-insect
#16
Adam Glazaczow, David Orwin, Michał Bogdziewicz
We analyzed the impact of increased water temperature on the late-season phenology of the mayfly (Baetis liebenauae). The River Gwda, unlike two other examined rivers (controls), has reservoirs along its length and thus, higher water temperature. Elevated water temperature prolonged summer diapause of the mayfly and shifted its life cycle to the later autumn: the last generation of mayflies started development later in the Gwda than in the control rivers. This translated into terrestrial stages (subimagos) of the insect being more abundant at the water surface in the late autumn in the Gwda river than in the control rivers...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27905043/potential-role-of-anammox-in-nitrogen-removal-in-a-freshwater-reservoir-jiulonghu-reservoir-china
#17
Li-Dong Shen, Hai-Xiang Cheng, Xu Liu, Jian-Hui Li, Yan Liu
Currently, the nitrogen removal potential of anaerobic ammonium oxidation (anammox) and its regulating factors in reservoir systems remain uncertain. Here, we provided the molecular and isotopic evidence for anammox in the freshwater sediment of Jiulonghu Reservoir that is located in Quzhou, Zhejiang Province, China. Diverse 16S rRNA gene sequences related to Candidatus Kuenenia and Candidatus Brocadia were detected by using high-throughput (Illumina MiSeq) sequencing of total bacterial 16S rRNA genes, and the Candidatus Brocadia was the most frequently detected anammox bacterial genus...
November 30, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27903286/carrion-s-disease-an-eradicable-illness
#18
Cláudia Gomes, Maria J Pons, Juana Del Valle Mendoza, Joaquim Ruiz
Carrion's disease is a neglected tropical disease caused by Bartonella bacilliformis, a vector-borne pathogen restricted to the Andean valleys of Peru, Ecuador and Colombia. Carrion's disease is a biphasic illness; in the acute phase the case-fatality rate can be as high as 88 %, related to high parasitemia, arriving to almost all erythrocytes, and secondary bacterial infections close related with the development of transient immunosuppression in the earlier illness phases. In addition, there are an undefined number of asymptomatic carriers that are reservoirs of the etiological agent of Carrion's disease in endemic areas, they make take into account due to they are the perpetuators of this disease...
December 1, 2016: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/27903066/the-spatio-temporal-distribution-of-oncomelania-hupensis-along-yangtze-river-in-jiangsu-province-china-after-implementation-of-a-new-integrated-schistosomiasis-control-strategy
#19
Jian He, Wei Li, Robert Bergquist, Jian-Feng Zhang, Liang Shi, Song Zhao, Feng Wu, Kun Yang
This study concerns an integrated strategy of schistosomiasis control, focusing on the management and elimination of the main transmission cycles and reservoirs along Yangtze river, Jiangsu Province (China), instituted in 2004. Our analysis, including mapping, spatial autocorrelation and spatio-temporal scanning, was implemented between 2001 and 2013 to explore the changes in the distribution of Oncomelania hupensis, the intermediate host of Schistosoma japonicum. Two high-density snail locations in the upper and middle reaches of the river were observed along with one high-risk area due to infected snails in the upper reaches at the beginning of the study period...
November 29, 2016: Geospatial Health
https://www.readbyqxmd.com/read/27902394/validation-of-self-administered-nasal-swabs-and-postage-for-the-isolation-of-staphylococcus-aureus
#20
Ewan Harrison, Nicholas S Gleadall, Xiaoliang Ba, John Danesh, Sharon J Peacock, Mark Holmes
Staphylococcus aureus carriers are at higher risk of S. aureus infection and are a reservoir for transmission to others. Detection of nasal S. aureus carriage is important for both targeted decolonisation and epidemiological studies. Self-administered nasal swabbing has been reported previously, but the impact of posting swabs prior to culture on S. aureus yield has not been investigated. A longitudinal cohort study was performed in which healthy volunteers were recruited, trained in the swabbing procedure, and asked to take weekly nasal swabs for 6 weeks (median: 3 weeks, range 1 to 6 weeks)...
October 31, 2016: Journal of Medical Microbiology
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