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https://www.readbyqxmd.com/read/28920599/magnetic-nanoparticle-enhanced-surface-plasmon-resonance-biosensor-for-extracellular-vesicle-analysis
#1
Agnes T Reiner, Nicolas-Guillermo Ferrer, Priyamvada Venugopalan, Ruenn Chai Lai, Sai Kiang Lim, Jakub Dostálek
The sensitive analysis of small lipid extracellular vesicles (EVs) by using a grating-coupled surface plasmon resonance (GC-SPR) biosensor has been reported. In order to enable the analysis of trace amounts of EVs present in complex liquid samples, the target analyte is pre-concentrated on the sensor surface by using magnetic nanoparticles and its affinity binding is probed by wavelength interrogation of SPR. The GC-SPR has been demonstrated to allow for the implementation of efficient pulling of EVs to the sensor surface by using magnetic nanoparticles and an external magnetic field gradient applied through the sensor chip...
September 18, 2017: Analyst
https://www.readbyqxmd.com/read/28919551/identification-of-potential-antigens-from-non-classically-secreted-proteins-and-designing-novel-multitope-peptide-vaccine-candidate-against-brucella-melitensis-through-reverse-vaccinology-and-immunoinformatics-approach
#2
Udayakumar S Vishnu, Jagadesan Sankarasubramanian, Paramasamy Gunasekaran, Jeyaprakash Rajendhran
Brucella melitensis is an intracellular pathogen resides in the professional and non-professional phagocytes of the host, causing zoonotic disease brucellosis. The stealthy nature of the Brucella makes it's highly pathogenic, and it is hard to eliminate the bacteria completely from the infected host. Hitherto, no licensed vaccines are available for human brucellosis. In this study, we identified potential antigens for vaccine development from non-classically secreted proteins through reverse vaccinology approach...
September 14, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28919196/inca-c-plasmids-conferring-high-azithromycin-resistance-in-vibrio-cholera
#3
Ruibai Wang, Haican Liu, Xiuqin Zhao, Jie Li, Kanglin Wan
Azithromycin (AZM) is a clinically important antibiotic to Vibrio cholerae especially for inhibiting colonization of V. cholerae in intestine and the treatment of severe cholera in children and pregnant women. One IncA/C plasmid was isolated from both of the high MIC AZM resistant V cholerae strains of the two mainly pathogenic serogroups, O1 and O139. In the 172 predicted ORFs, 16 genes were related to antibiotic resistance in which 5 were well-defined genes associated with macrolide resistance. The 5 macrolide resistant genes disturbed in two clusters, mphR-mrx-mph(K) and mel-mph2, flanking by insertion sequence (IS) and involving two kinds of mechanisms...
September 14, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28917946/cellular-uptake-and-intracellular-localization-of-poly-acrylic-acid-nanoparticles-in-a-rainbow-trout-oncorhynchus-mykiss-gill-epithelial-cell-line-rtgill-w1
#4
Lindsey C Felix, Van A Ortega, Greg G Goss
The ever-growing production of engineered nanoparticles (NPs) for use in many agricultural, commercial, consumer, and industrial applications will lead to their accidental or intentional release into the environment. Potential routes of environmental exposure include manufacturing or transport spills, disposal of NP-containing products down the drain and/or in landfills, as well as direct usage on agricultural land. Therefore, NPs will inevitably contaminate aquatic environments and interact with resident organisms...
September 7, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28917709/in-vitro-interactions-of-acanthamoeba-castellanii-neff-and-vibrio-harveyi
#5
María Reyes-Batlle, Alberto J Martín-Rodríguez, Atteneri López-Arencibia, Ines Sifaoui, Aitor Rizo Liendo, Carlos J Bethencourt Estrella, Ana B García Méndez, Olfa Chiboub, Soumaya Hajaji, Basilio Valladares, Enrique Martínez-Carretero, José E Piñero, Jacob Lorenzo-Morales
Free-living amoebae (FLA) are opportunistic protozoa widely distributed in the environment. They are frequently found in water and soil samples, but they have also been reported to be associated with bacterial human pathogens such as Legionella spp. Campylobacter spp or Vibrio cholerae among others. Including within Vibrio spp. V. harveyi (Johnson and Shunk, 1936) is a bioluminescent marine bacteria which has been found swimming freely in tropical marine waters, being part of the stomach and intestine microflora of marine animals, and as both a primary and opportunistic pathogen of marine animals...
September 13, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28917176/health-based-ingestion-exposure-guidelines-for-vibrio-cholerae-technical-basis-for-water-reuse-applications
#6
Annetta P Watson, Anthony Q Armstrong, George H White, Brandolyn H Thran
U.S. military and allied contingency operations are increasingly occurring in locations with limited, unstable or compromised fresh water supplies. Non-potable graywater reuse is currently under assessment as a viable means to increase mission sustainability while significantly reducing the resources, logistics and attack vulnerabilities posed by transport of fresh water. Development of health-based (non-potable) exposure guidelines for the potential microbial components of graywater would provide a logical and consistent human-health basis for water reuse strategies...
September 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28916247/comparison-of-two-control-groups-for-estimation-of-oral-cholera-vaccine-effectiveness-using-a-case-control-study-design
#7
Molly F Franke, J Gregory Jerome, Wilfredo R Matias, Ralph Ternier, Isabelle J Hilaire, Jason B Harris, Louise C Ivers
BACKGROUND: Case-control studies to quantify oral cholera vaccine effectiveness (VE) often rely on neighbors without diarrhea as community controls. Test-negative controls can be easily recruited and may minimize bias due to differential health-seeking behavior and recall. We compared VE estimates derived from community and test-negative controls and conducted bias-indicator analyses to assess potential bias with community controls. METHODS: From October 2012 through November 2016, patients with acute watery diarrhea were recruited from cholera treatment centers in rural Haiti...
September 12, 2017: Vaccine
https://www.readbyqxmd.com/read/28910563/safety-and-immunogenicity-of-the-killed-bivalent-o1-and-o139-whole-cell-cholera-vaccine-in-the-philippines
#8
Maria Rosario Z Capeding, Maria Liza Antoinette M Gonzales, Mandeep Singh Dhingra, Naveena Aloysia D'cor, Venkat Jayanth Midde, Badri Narayan Patnaik, Yaël Thollot, Eric Desauziers
The killed bivalent (O1 and O139) whole cell oral cholera vaccine (OCV) (Shanchol™) was first licensed in India in 2009 and World Health Organization pre-qualified in 2011. We assessed the safety and immunogenicity of this OCV in the Philippines. This was a phase IV, single-arm, descriptive, open-label study. We recruited 336 participants from two centers: 112 participants in each age group (1-4, 5-14 and ≥15 years). Participants received two OCV doses 14 days apart. Safety was monitored throughout the trial...
September 14, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28910274/notes-from-the-field-vibrio-cholerae-serogroup-o1-serotype-inaba-minnesota-august-2016
#9
Victoria Hall, Carlota Medus, George Wahl, Alida Sorenson, Melanie Orth, Monica Santovenia, Erin Burdette, Kirk Smith
No abstract text is available yet for this article.
September 15, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28906178/comparison-of-whole-genome-sequencing-to-restriction-endonuclease-analysis-and-gel-diffusion-precipitin-based-serotyping-of-pasteurella-multocida
#10
Karen J LeCount, Linda K Schlater, Tod Stuber, Suelee Robbe Austerman, Timothy S Frana, Ronald W Griffith, Matthew M Erdman
The gel diffusion precipitin test (GDPT) and restriction endonuclease analysis (REA) have commonly been used in the serotyping and genotyping of Pasteurella multocida. Whole genome sequencing (WGS) and single nucleotide polymorphism (SNP) analysis has become the gold standard for other organisms, offering higher resolution than previously available methods. We compared WGS to REA and GDPT on 163 isolates of P. multocida to determine if WGS produced more precise results. The isolates used represented the 16 reference serovars, isolates with REA profiles matching an attenuated fowl cholera vaccine strain, and isolates from 10 different animal species...
September 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28906060/novel-coordination-of-lipopolysaccharide-modifications-in-vibrio-cholerae-promotes-camp-resistance
#11
Carmen M Herrera, Jeremy C Henderson, Alexander A Crofts, M Stephen Trent
In the environment and during infection, the human intestinal pathogen Vibrio cholerae must overcome noxious compounds that damage the bacterial outer membrane. The El Tor and classical biotypes of O1 V. cholerae show striking differences in their resistance to membrane disrupting cationic antimicrobial peptides (CAMPs), such as polymyxins. The classical biotype is susceptible to CAMPs, but current pandemic El Tor biotype isolates gain CAMP resistance by altering the net charge of their cell surface through glycine modification of lipid A...
September 14, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28905402/affinity-capillary-electrophoresis-for-the-assessment-of-binding-affinity-of-carbohydrate-based-cholera-toxin-inhibitors
#12
Oier Aizpurua-Olaizola, Javier Sastre Torano, Aliaksei Pukin, Ou Fu, Geert Jan Boons, Gerhardus J de Jong, Roland J Pieters
Developing tools for the study of protein carbohydrate interactions is an important goal in glycobiology. Cholera toxin inhibition is an interesting target in this context, as its inhibition may help the fight against cholera. For the study of novel ligands an affinity capillary electrophoresis (ACE) method was optimised and applied. The method uses unlabeled cholera toxin B-subunit (CTB) and unlabeled carbohydrate ligands based on ganglioside GM1-oligosaccharides (GM1os). In an optimized method at pH 4, adsorption of the protein to the capillary walls was prevented by a polybrene-dextran sulfate-polybrene (PB-DS-PB) coating...
September 14, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28904700/descriptive-epidemiology-of-a-cholera-outbreak-in-kaduna-state-northwest-nigeria-2014
#13
Ibrahim Baffa Sule, Mohammed Yahaya, Abubakar Ahmed Aisha, Ahmed Datti Zainab, Bajoga Ummulkhulthum, Patrick Nguku
INTRODUCTION: Cholera is an acute gastrointestinal infection caused by Vibrio cholerae, which may lead to severe dehydration and death if not treated. This analysis is aimed at highlighting the magnitude, pattern and trend of cholera outbreak that occurred in Kaduna State in 2014. METHODS: We obtained the 2014 cholera line-list from the Kaduna State Disease Surveillance and Notification officer (DSNO). We described the outbreaks in time, place and person using Epi-info 7 and Health Mapper...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28901020/the-location-of-projection-neurons-to-the-biceps-brachii-muscle-in-the-telencephalon-of-the-pigeon
#14
J H Park, J H Ahn, S Y Choi, J H Cho, T-K Lee, I H Kim, J-C Lee, J H Choi, I K Hwang, Y J Lee, E Lee, S Park, J Lim, K Seo, M-H Won
Few studies regarding the anatomical distribution of motor neurons innervating muscles of the arm have been demonstrated in avian brains. The purpose of this study was to finely determine the localization of cerebral neurons innervating the biceps brachii muscle in the pigeon. The cholera toxin B subunit (CTB) was employed as a retrograde tracer to determine the location of neurons controlling the biceps brachii muscle in the telencephalon following intramuscular injection in male pigeons (n = 7), which were killed 14 days after intramuscular injection with CTB...
September 12, 2017: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/28898293/the-vibrio-cholerae-var-regulon-encodes-a-metallo-%C3%AE-lactamase-and-an-antibiotic-efflux-pump-which-are-regulated-by-varr-a-lysr-type-transcription-factor
#15
Hong-Ting Victor Lin, Teresa Massam-Wu, Chen-Ping Lin, Yen-Jen Anna Wang, Yu-Chi Shen, Wen-Jung Lu, Pang-Hung Hsu, Yu-Hou Chen, Maria Ines Borges-Walmsley, Adrian Robert Walmsley
The genome sequence of V. cholerae O1 Biovar Eltor strain N16961 has revealed a putative antibiotic resistance (var) regulon that is predicted to encode a transcriptional activator (VarR), which is divergently transcribed relative to the putative resistance genes for both a metallo-β-lactamase (VarG) and an antibiotic efflux-pump (VarABCDEF). We sought to test whether these genes could confer antibiotic resistance and are organised as a regulon under the control of VarR. VarG was overexpressed and purified and shown to have β-lactamase activity against penicillins, cephalosporins and carbapenems, having the highest activity against meropenem...
2017: PloS One
https://www.readbyqxmd.com/read/28894440/otitis-media-caused-by-v-cholerae-o100-a-case-report-and-review-of-the-literature
#16
Peter Kechker, Yigal Senderovich, Shifra Ken-Dror, Sivan Laviad-Shitrit, Eiji Arakawa, Malka Halpern
Infections due to Vibrio cholerae are rarely documented in Israel. Here we report a case of recurrent otitis media in a young male, caused by V. cholerae non-O1/O139. This extra-intestinal infection was caused by V. cholerae O100 and has been associated with freshwater exposure and travel. Symptoms of chronic periodic earaches along with purulent exudate began about one week after the patient suffered a water skiing accident on a river in Australia. The condition lasted for three years, until his ear exudate was examined in a clinical laboratory, diagnosed and treated...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28894128/microbial-colonization-is-required-for-normal-neurobehavioral-development-in-zebrafish
#17
Drake Phelps, Nichole E Brinkman, Scott P Keely, Emily M Anneken, Tara R Catron, Doris Betancourt, Charles E Wood, Scott T Espenschied, John F Rawls, Tamara Tal
Changes in resident microbiota may have wide-ranging effects on human health. We investigated whether early life microbial disruption alters neurodevelopment and behavior in larval zebrafish. Conventionally colonized, axenic, and axenic larvae colonized at 1 day post fertilization (dpf) were evaluated using a standard locomotor assay. At 10 dpf, axenic zebrafish exhibited hyperactivity compared to conventionalized and conventionally colonized controls. Impairment of host colonization using antibiotics also caused hyperactivity in conventionally colonized larvae...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28891049/differential-projections-of-the-densocellular-and-intermediate-parts-of-the-hyperpallium-in-the-pigeon-columba-livia
#18
Yasuro Atoji, Sonjoy Sarkar, J Martin Wild
The visual Wulst in birds shows a four-layered structure: apical part of the hyperpallium (HA), interstitial part of HA (IHA), intercalated part of hyperpallium (HI), and densocellular part of hyperpallium (HD). HD also connects with the hippocampus and olfactory system. Because HD is subjacent to HI, the two have been treated as one structure in many studies, and the fiber connections of HD have been examined by afferents and efferents originating outside HD. However, to clarify the difference between these two layers, they need to be treated separately...
September 10, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28888984/cannabidiol-a-novel-inverse-agonist-for-gpr12
#19
Kevin J Brown, Alyssa S Laun, Zhao-Hui Song
GPR12 is a constitutively active, Gs protein-coupled receptor that currently has no confirmed endogenous ligands. GPR12 may be involved in physiological processes such as maintenance of oocyte meiotic arrest and brain development, as well as pathological conditions such as metastatic cancer. In this study, the potential effects of various classes of cannabinoids on GPR12 were tested using a cAMP accumulation assay. Our data demonstrate that cannabidiol (CBD), a major non-psychoactive phytocannabinoid, acted as an inverse agonist to inhibit cAMP accumulation stimulated by the constitutively active GPR12...
September 6, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28888938/occurrence-of-vibrio-cholerae-in-water-reservoirs-of-burkina-faso
#20
Kaboré Saidou, Philippe Cecchi, Thomas Mosser, Toubiana Mylène, Traoré Oumar, Aboubakar S Ouattara, Alfred S Traoré, Nicolas Barro, Rita R Colwell, Patrick Monfort
Africa is currently an important region in which cholera epidemics occur. Little is known about the presence of Vibriocholerae in freshwater bodies in Africa. There are ca. 1,700 lakes and reservoirs in Burkina Faso, most of which have been built within recent decades to secure water resources. The purpose of this study was to investigate the presence of V. cholera in the water of reservoirs, using the most-probable-number polymerase chain reaction. Results showed that V. cholera could be detected in water samples collected from 14 of 39 sampled reservoirs...
September 6, 2017: Research in Microbiology
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