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https://www.readbyqxmd.com/read/28650987/accuracy-of-zika-virus-disease-case-definition-during-simultaneous-dengue-and-chikungunya-epidemics
#1
José Ueleres Braga, Clarisse Bressan, Ana Paula Razal Dalvi, Guilherme Amaral Calvet, Regina Paiva Daumas, Nadia Rodrigues, Mayumi Wakimoto, Rita Maria Ribeiro Nogueira, Karin Nielsen-Saines, Carlos Brito, Ana Maria Bispo de Filippis, Patrícia Brasil
BACKGROUND: Zika is a new disease in the American continent and its surveillance is of utmost importance, especially because of its ability to cause neurological manifestations as Guillain-Barré syndrome and serious congenital malformations through vertical transmission. The detection of suspected cases by the surveillance system depends on the case definition adopted. As the laboratory diagnosis of Zika infection still relies on the use of expensive and complex molecular techniques with low sensitivity due to a narrow window of detection, most suspected cases are not confirmed by laboratory tests, mainly reserved for pregnant women and newborns...
2017: PloS One
https://www.readbyqxmd.com/read/28649563/symptomatic-congenital-cytomegalovirus-infection-in-children-of-seropositive-women
#2
Ines Mack, Marie-Anne Burckhardt, Ulrich Heininger, Friederike Prüfer, Sven Schulzke, Sven Wellmann
Cytomegalovirus (CMV) is the most frequent congenital virus infection worldwide. The risk of congenital CMV (cCMV) transmission is highest in seronegative women who acquire primary CMV infection during pregnancy. A growing body of evidence indicates that secondary CMV infections in pregnant women with preconceptual immunity (either through reactivation of latent virus or re-infection with a new strain of CMV) contribute to a much greater proportion of symptomatic cCMV than was previously thought. Here, we describe a case of symptomatic cCMV infection in the newborn of a woman with proven immunity prior to pregnancy...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28646142/efficacy-and-safety-of-tenofovir-disoproxil-fumarate-in-preventing-vertical-transmission-of-hepatitis-b-in-pregnancies-with-high-viral-load
#3
Jun-Ze Chen, Zuo-Wei Liao, Fei-Long Huang, Ru-Kui Su, Wen-Bo Wang, Xue-Yuan Cheng, Jie-Qing Chen, Jia-Qi Liu, Zhong Huang
This study was a meta-analysis of the literature on the efficacy and safety of tenofovir disoproxil fumarate (TDF) in preventing vertical transmission of hepatitis B in pregnancies with high viral load. Four observational studies and one randomized controlled trial involving 585 pregnant women and 595 newborns were included in the meta-analysis. TDF was more effective than the placebo in reducing vertical transmission in HBeAg-positive chronic hepatitis B (CHB) pregnancies with high serum HBV-DNA levels (OR = 0...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28642061/the-basic-reproduction-number-of-vector-borne-plant-virus-epidemics
#4
Frank Van den Bosch, Michael J Jeger
The basic reproduction number R0 is a key parameter in plant disease epidemiology, which largely determines whether or not an epidemic will occur in a plant population. The next generation matrix approach to deriving and calculating the basic reproduction number of a plant virus epidemic is described. The approach is illustrated through a series of examples of increasing complexity, ranging from the simplest case of one vector transmitting one virus to a single host, to the case of multiple vectors, to combined horizontal (vector) and vertical (seed) transmission, and where vector control using insecticides is practised...
June 19, 2017: Virus Research
https://www.readbyqxmd.com/read/28636609/genomic-and-phenotypic-characterisation-of-fluoroquinolone-resistance-mechanisms-in-enterobacteriaceae-in-durban-south-africa
#5
John Osei Sekyere, Daniel Gyamfi Amoako
Resistance to fluoroquinolones (FQ) is being increasingly reported and found to be mediated by efflux pumps, plasmid-mediated quinolone resistance genes (PMQR) and mutations in gyrA, gyrB, parC and parE. However, studies reporting on FQ resistance mechanisms (FQRM), particularly in Africa, are focused mostly on Salmonella. This study used a whole-genome-based approach to describe FQRM in forty-eight clinical Enterobacteriaceae isolates comprising of Klebsiella pneumoniae (n = 21), Serratia marcescens (n = 12), Enterobacter spp...
2017: PloS One
https://www.readbyqxmd.com/read/28631353/microbiome-dynamics-in-early-life-stages-of-the-scleractinian-coral-acropora-gemmifera-in-response-to-elevated-pco2
#6
Guowei Zhou, Lin Cai, Tao Yuan, Renmao Tian, Haoya Tong, Weipeng Zhang, Lei Jiang, Minglan Guo, Sheng Liu, Pei-Yuan Qian, Hui Huang
Reef-building coral is a complex holobiont, harbouring diverse microorganisms that play essential roles in maintaining coral health. However, microbiome development in early life stages of coral remains poorly understood. Here, microbiomes of Acropora gemmifera were analysed during spawning and early developmental stages, and also under different seawater partial pressure of CO2 (pCO2 ) conditions, using amplicon sequencing of 16S rRNA gene for bacteria and archaea and of ITS2 for Symbiodinium. No remarkable microbiome shift was observed in adults before and after spawning...
June 19, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28631164/studies-on-vertical-transmission-of-trichinella-spiralis-in-experimentally-infected-guinea-pigs-cavia-porcellus
#7
Eliana Riva, Cesar Fiel, Gisele Bernat, Sebastián Muchiut, Pedro Steffan
An experimental study to enhance knowledge on the capability of Trichenella spiralis to pass from guinea pigs to progeny at different periods of pregnancy or lactation was performed. For this purpose, 18 female adult guinea pigs were inoculated with 100 or 1000 T. spiralis muscle larvae (ML) during early, late gestation and during lactation period. The presence of T. spiralis (ML) in mothers and newborns was studied through enzymatic digestion from muscle samples. ML were observed in 9 of 42 newborn guinea pigs and levels of infection were significantly higher when infections of mothers were done during late gestation (p = 0...
June 19, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28630925/buckyball-sandwiches
#8
Rasim Mirzayev, Kimmo Mustonen, Mohammad R A Monazam, Andreas Mittelberger, Timothy J Pennycook, Clemens Mangler, Toma Susi, Jani Kotakoski, Jannik C Meyer
Two-dimensional (2D) materials have considerably expanded the field of materials science in the past decade. Even more recently, various 2D materials have been assembled into vertical van der Waals heterostacks, and it has been proposed to combine them with other low-dimensional structures to create new materials with hybridized properties. We demonstrate the first direct images of a suspended 0D/2D heterostructure that incorporates C60 molecules between two graphene layers in a buckyball sandwich structure...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28629167/igg-avidity-test-in-congenital-toxoplasmosis-diagnoses-in-newborns
#9
Zulmirene Cardoso Fonseca, Isolina Maria Xavier Rodrigues, Natália Cruz E Melo, Juliana Boaventura Avelar, Ana Maria Castro, Mariza Martins Avelino
The goal of this study was to investigate the importance of IgG avidity testing in newborns (NBs) diagnosed with early congenital toxoplasmosis. We collected samples from 88 puerperae infected by Toxoplasma gondii (T. gondii) and their NBs (48 acutely-infected puerperae (AIP) and 40 chronically-infected puerperae (CIP)), from two public maternity hospitals in Goiania city, Goias, Brazil, from 2010 to 2015. Specific anti-T. gondii IgM and IgG serum levels and IgG avidity tests were evaluated using chemiluminescence...
June 18, 2017: Pathogens
https://www.readbyqxmd.com/read/28625292/no-185-hiv-screening-in-pregnancy
#10
Lisa Keenan-Lindsay, Mark H Yudin
OBJECTIVE: The purpose of this guideline is to provide recommendations to obstetric health care providers and to minimize practice variations for HIV screening, while taking provincial and territorial recommendations into account. OUTCOMES: The risk of transmission of HIV from mother to fetus is significant if the mother is not treated. The primary outcome of screening for and treating HIV in pregnancy is a marked decrease in the rate of vertical transmission of HIV from mother to fetus...
July 2017: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/28623959/the-impact-of-wolbachia-infection-on-the-rate-of-vertical-transmission-of-dengue-virus-in-brazilian-aedes-aegypti
#11
Etiene Casagrande Pacidônio, Eric Pearce Caragata, Debora Magalhães Alves, João Trindade Marques, Luciano Andrade Moreira
BACKGROUND: Wolbachia pipientis is a common endosymbiotic bacterium of arthropods that strongly inhibits dengue virus (DENV) infection and transmission in the primary vector, the mosquito Aedes aegypti. For that reason, Wolbachia-infected Ae. aegypti are currently being released into the field as part of a novel strategy to reduce DENV transmission. However, there is evidence that DENV can be transmitted vertically from mother to progeny, and this may help the virus persist in nature in the absence of regular human transmission...
June 17, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28622852/efficacy-of-e2-glycoprotein-fused-to-porcine-cd154-as-a-novel-chimeric-subunit-vaccine-to-prevent-classical-swine-fever-virus-vertical-transmission-in-pregnant-sows
#12
Sara Muñoz-González, Yusmel Sordo, Marta Pérez-Simó, Marisela Suárez, Albert Canturri, Maria Pilar Rodriguez, María Teresa Frías-Lepoureau, Mariano Domingo, Mario Pablo Estrada, Llilianne Ganges
Here we evaluated the effect of double vaccination with a novel subunit marker vaccine candidate based in the CSFV E2 glycoprotein fused to the porcine CD154 to prevent CSFV vertical transmission. A lentivirus-based gene delivery system was used to obtain a stable recombinant HEK 293 cell line for the expression of E2 fused to porcine CD154 molecule. Six pregnant sows were distributed in two groups and at 64days of gestation animals numbered 1-4 (group 1) were vaccinated via intramuscular inoculation with 50μg of E2-CD154 subunit vaccine...
June 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28619147/detection-of-mycoplasma-hyopneumoniae-in-naturally-infected-gilts-over-time
#13
Karine L Takeuti, David E S N de Barcellos, Anne C de Lara, Cintia F Kunrath, Maria Pieters
Mycoplasma hyopneumoniae causes a chronic respiratory infection in pigs and its transmission occurs mainly by direct contact and by vertical transmission (sow-to-piglet). The objective of this study was to assess the detection dynamics and persistence of M. hyopneumoniae natural infection in replacement gilts. Forty-four twenty-day-old gilts were selected from a M. hyopneumoniae positive farm and followed up to one day prior to their first weaning. Laryngeal swabs were collected every 30days, starting at day 20, for M...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28619142/drivers-of-bartonella-infection-in-micromammals-and-their-fleas-in-a-mediterranean-peri-urban-area
#14
Aitor Cevidanes, Laura Altet, Andrea D Chirife, Tatiana Proboste, Javier Millán
People living at the human/wildlife interface are at risk of becoming infected with Bartonella for which micromammals act as reservoir. We aimed to determine the factors related to the prevalence of Bartonella and its haplotype diversity in micromammals and in their fleas in a Mediterranean peri-urban environment. We analyzed 511 micromammals, chiefly 407 wood mice (Apodemus sylvaticus), captured into Barcelona metropolitan area (Spain) in spring and autumn from 2011 to 2013 in two natural and two adjacent residential areas, their fleas (grouped in 218 monospecific pools) and 29 fetuses from six Bartonella-positive female wood mice...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28618799/biosonar-signal-propagation-in-the-harbor-porpoise-s-phocoena-phocoena-head-the-role-of-various-structures-in-the-formation-of-the-vertical-beam
#15
Chong Wei, Whitlow W L Au, Darlene R Ketten, Zhongchang Song, Yu Zhang
Harbor porpoises (Phocoena phocoena) use narrow band echolocation signals for detecting and locating prey and for spatial orientation. In this study, acoustic impedance values of tissues in the porpoise's head were calculated from computer tomography (CT) scan and the corresponding Hounsfield Units. A two-dimensional finite element model of the acoustic impedance was constructed based on CT scan data to simulate the acoustic propagation through the animal's head. The far field transmission beam pattern in the vertical plane and the waveforms of the receiving points around the forehead were compared with prior measurement results, the simulation results were qualitatively consistent with the measurement results...
June 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28617810/population-level-impact-of-an-accelerated-hiv-response-plan-to-reach-the-unaids-90-90-90-target-in-c%C3%A3-te-d-ivoire-insights-from-mathematical-modeling
#16
Mathieu Maheu-Giroux, Juan F Vesga, Souleymane Diabaté, Michel Alary, Stefan Baral, Daouda Diouf, Kouamé Abo, Marie-Claude Boily
BACKGROUND: National responses will need to be markedly accelerated to achieve the ambitious target of the Joint United Nations Programme on HIV/AIDS (UNAIDS). This target aims for 90% of HIV-positive individuals to be aware of their status, for 90% of those aware to receive antiretroviral therapy (ART), and for 90% of those on treatment to have a suppressed viral load by 2020, with each individual target reaching 95% by 2030. We aimed to estimate the impact of various treatment-as-prevention scenarios in Côte d'Ivoire, one of the countries with the highest HIV incidence in West Africa, with unmet HIV prevention and treatment needs, and where key populations are important to the broader HIV epidemic...
June 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28614467/-epidemiological-surveillance-of-vertical-transmission-of-syphilis-data-from-six-federal-units-in-brazil
#17
Valeria Saraceni, Gerson Fernando Mendes Pereira, Mariangela Freitas da Silveira, Maria Alix Leite Araujo, Angelica Espinosa Miranda
Objective: To describe the epidemiological profile of reported cases of syphilis in pregnancy and congenital syphilis in five states (Amazonas, Ceará, Espírito Santo, Rio de Janeiro, and Rio Grande do Sul) and the Federal District using data from the Reportable Disease Information System (SINAN). Method: This descriptive study including an ecological and cross-sectional evaluation employed data from SINAN Net. The syphilis detection rate in pregnancy and the congenital syphilis incidence rate per 1 000 live births were calculated...
June 8, 2017: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/28613894/individual-defects-in-inas-ingaassb-gasb-nanowire-tunnel-field-effect-transistors-operating-below-60-mv-decade
#18
Elvedin Memisevic, Markus Hellenbrand, Erik Lind, Axel R Persson, Saurabh Sant, Andreas Schenk, Johannes Svensson, Lars-Erik Wernersson, Lars Reine Wallenberg
Tunneling Field-Effect Transistors (TunnelFET), a leading steep-slope transistor candidate, is still plagued by defect response and there is a large discrepancy between measured and simulated device performance. In this work, highly scaled InAs-InxGa1-xAsySb1-y-GaSb vertical nanowire TunnelFET with ability to operate well below 60 mV/decade at technically relevant currents are fabricated and characterized. The structure, composition, and strain is characterized using transmission electron microscopy with emphasis on the heterojunction...
June 14, 2017: Nano Letters
https://www.readbyqxmd.com/read/28612589/-post-exposure-prophylaxis-against-hiv-do-we-use-our-resources-appropriately
#19
R Escudero-Sánchez, C J Kurt Meier-de-Taboada, E Bartolome-García, P M Rodríguez-de-Bethencourt-Sanjuan, J E Losa-García
OBJECTIVE: Post-exposure prophylaxis (PEP) against human immunodeficiency virus can be occupational, non-occupational or vertical transmission. The aim of our study was to analyse the indication and treatment carried out in a hospital. METHODS: Retrospective observational study that included all patients who received PEP between 2006 and 2014. The project was approved by the Committee for Ethics in Clinical Research. RESULTS: We evaluated 54 PEP, which were started at 11...
June 14, 2017: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/28605178/epitaxial-templating-of-two-dimensional-metal-chloride-nanocrystals-on-monolayer-molybdenum-disulfide
#20
Shanshan Wang, Huashan Li, Junying Zhang, Shaoqiang Guo, Wenshuo Xu, Jeffrey C Grossman, Jamie H Warner
We demonstrate the formation of ionic metal chloride (CuCl) two-dimensional (2D) nanocrystals epitaxially templated on the surface of monolayer molybdenum disulfide (MoS2). These 2D CuCl nanocrystals are single atomic planes from a nonlayered bulk CuCl structure. They are stabilized as a 2D monolayer on the surface of the MoS2 through interactions with the uniform periodic surface of the MoS2. The heterostructure 2D system is studied at the atomic level using aberration-corrected transmission electron microscopy at 80 kV...
June 12, 2017: ACS Nano
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