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https://www.readbyqxmd.com/read/28429036/a-review-of-zika-virus-infections-in-pregnancy-and-implications-for-antenatal-care-in-singapore
#1
Harvard Zhenjia Lin, Paul Anantharajah Tambyah, Eu Leong Yong, Arijit Biswas, Shiao-Yng Chan
Given the consensus that there is a causal relationship between Zika virus (ZIKV) infection in pregnancy and congenital Zika syndrome (CZS), clinicians must be prepared to manage affected patients despite the numerous gaps in current knowledge. The clinical course in pregnancy appears similar to that in non-pregnant women, although viraemia may be prolonged. ZIKV infection can be diagnosed by serum and urine reverse transcription-polymerase chain reaction, but commercially available serological tests are currently unreliable in dengue-endemic regions...
April 2017: Singapore Medical Journal
https://www.readbyqxmd.com/read/28421043/outlining-core-pathways-of-amyloid-toxicity-in-bacteria-with-the-repa-wh1-prionoid
#2
Laura Molina-García, María Moreno-Del Álamo, Pedro Botias, Zaira Martín-Moldes, María Fernández, Alicia Sánchez-Gorostiaga, Aída Alonso-Del Valle, Juan Nogales, Jesús García-Cantalejo, Rafael Giraldo
The synthetic bacterial prionoid RepA-WH1 causes a vertically transmissible amyloid proteinopathy in Escherichia coli that inhibits growth and eventually kills the cells. Recent in vitro studies show that RepA-WH1 builds pores through model lipid membranes, suggesting a possible mechanism for bacterial cell death. By comparing acutely (A31V) and mildly (ΔN37) cytotoxic mutant variants of the protein, we report here that RepA-WH1(A31V) expression decreases the intracellular osmotic pressure and compromise bacterial viability under either aerobic or anaerobic conditions...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28419254/evidence-of-zika-virus-rna-fragments-in-aedes-albopictus-diptera-culicidae-field-collected-eggs-from-cama%C3%A3-ari-bahia-brazil
#3
Chelsea T Smartt, Tanise M S Stenn, Tse-Yu Chen, Maria Gloria Teixeira, Erivaldo P Queiroz, Luciano Souza Dos Santos, Gabriel A N Queiroz, Kathleen Ribeiro Souza, Luciano Kalabric Silva, Dongyoung Shin, Walter J Tabachnick
A major mosquito-borne viral disease outbreak caused by Zika virus (ZIKV) occurred in Bahia, Brazil, in 2015, largely due to transmission by the mosquito, Aedes aegypti (L.). Detecting ZIKV in field samples of Ae. aegypti has proven problematic in some locations, suggesting other mosquito species might be contributing to the spread of ZIKV. In this study, several (five) adult Aedes albopictus (Skuse) mosquitoes that emerged from a 2015 field collection of eggs from Camaçari, Bahia, Brazil, were positive for ZIKV RNA; however, attempts to isolate live virus were not successful...
April 14, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28417978/efficient-heat-dissipation-of-uncooled-400-gbps-16%C3%A3-25-gbps-optical-transceiver-employing-multimode-vcsel-and-pd-arrays
#4
Tien-Tsorng Shih, Yu-Chieh Chi, Ruei-Nian Wang, Chao-Hsin Wu, Jian-Jang Huang, Jau-Ji Jou, Tai-Cheng Lee, Hao-Chung Kuo, Gong-Ru Lin, Wood-Hi Cheng
An effective heat dissipation of uncooled 400-Gbps (16×25-Gbps) form-factor pluggable (CDFP) optical transceiver module employing chip-on-board multimode 25-Gbps vertical-surface-emitting-laser (VCSEL) and 25-Gbps photodiode (PD) arrays mounted on a brass metal core embedded within a printed circuit board (PCB) is proposed and demonstrated. This new scheme of the hollow PCB filling with thermally-dissipated brass metal core was simulated and used for high temperature and long term stability operation of the proposed 400-Gbps CDFP transceiver...
April 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28417593/anomalous-resistance-hysteresis-in-oxide-reram-oxygen-evolution-and-reincorporation-revealed-by-in-situ-tem
#5
David Cooper, Christoph Baeumer, Nicolas Bernier, Astrid Marchewka, Camilla La Torre, Rafal E Dunin-Borkowski, Stephan Menzel, Rainer Waser, Regina Dittmann
The control and rational design of redox-based memristive devices, which are highly attractive candidates for next-generation nonvolatile memory and logic applications, is complicated by competing and poorly understood switching mechanisms, which can result in two coexisting resistance hystereses that have opposite voltage polarity. These competing processes can be defined as regular and anomalous resistive switching. Despite significant characterization efforts, the complex nanoscale redox processes that drive anomalous resistive switching and their implications for current transport remain poorly understood...
April 18, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28413745/seven-cases-of-zika-virus-infection-in-south-florida
#6
Waqaar Khawar, Romina Bromberg, Molly Moor, Natalya Lyubynska, Hilda Mahmoudi
INTRODUCTION: Zika virus, an arbovirus of the Flaviviridae family, is a mosquito-borne virus known to cause microcephaly through vertical transmission. Infection presents with mild, self-limiting symptoms. Currently, a Zika virus outbreak has spread across most of South and Central America. Travel-related and sexually transmitted cases have been reported across the United States. However, the vector-borne transmission has been limited to Florida and Texas. We present seven cases of Zika virus infection that presented at a single institution in South Florida...
March 16, 2017: Curēus
https://www.readbyqxmd.com/read/28411096/-seroprevalence-and-vertical-transmission-of-chagas-disease-in-a-cohort-of-latin-american-pregnant-women-in-a-tertiary-hospital-in-madrid
#7
Laura Francisco-González, Teresa Gastañaga-Holguera, Beatriz Jiménez Montero, Zarife Daoud Pérez, Marta Illán Ramos, Paloma Merino Amador, Miguel Ángel Herráiz Martínez, José Tomás Ramos Amador
BACKGROUND: Chagas disease, caused by Trypanosoma cruzi (T. cruzi), is endemic in Latin-America and is emerging in Spain due to immigration. The vertical transmission rate is around 5%. A routine prenatal screening with serology of all pregnant women from endemic areas is recommended to identify infected newborns, allowing early treatment and cure. OBJECTIVE: The aim of this study was to estimate the prevalence of positive Chagas serology in a cohort of pregnant women from Latin-America and its vertical transmission...
April 12, 2017: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
https://www.readbyqxmd.com/read/28410552/a-novel-solubility-enhanced-rubusoside-based-micelles-for-increased-cancer-therapy
#8
Meiying Zhang, Tongcheng Dai, Nianping Feng
Many anti-cancer drugs have a common problem of poor solubility. Increasing the solubility of the drugs is very important for its clinical applications. In the present study, we revealed that the solubility of insoluble drugs was significantly enhanced by adding rubusoside (RUB). Further, it was demonstrated that RUB could form micelles, which was well characterized by Langmuir monolayer investigation, transmission electron microscopy, atomic-force microscopy, and cryogenic transmission electron microscopy...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28407790/ultrastructure-and-localization-of-neorickettsia-in-adult-digenean-trematodes-provides-novel-insights-into-helminth-endobacteria-interaction
#9
Kerstin Fischer, Vasyl V Tkach, Kurt C Curtis, Peter U Fischer
BACKGROUND: Neorickettsia are a group of intracellular α proteobacteria transmitted by digeneans (Platyhelminthes, Trematoda). These endobacteria can also infect vertebrate hosts of the helminths and cause serious diseases in animals and humans. Neorickettsia have been isolated from infected animals and maintained in cell cultures, and their morphology in mammalian cells has been described. However, limited information is available on the morphology and localization of Neorickettsia in the trematode host...
April 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28407735/telbivudine-treatment-started-in-early-and-middle-pregnancy-completely-blocks-hbv-vertical-transmission
#10
Weihui Sun, Shangfei Zhao, Lei Ma, Anhua Hao, Bo Zhao, Lin Zhou, Fengzhu Li, Mingquan Song
BACKGROUND: To evaluate the efficacy and safety of treating HBV-positive mothers with telbivudine in early and middle pregnancy to prevent mother-to-infant HBV transmission. METHODS: The subject population comprised pregnant women with chronic hepatitis B (CHB; n = 188) from January 2013 to June 2015, with HBV DNA ≥1.0 × 10(7)copies/mL and increased alanine aminotransferase levels. Groups A (n = 62) and B (n = 61) were treated with telbivudine starting at 12 weeks or 20-28 weeks after gestation, respectively...
April 13, 2017: BMC Gastroenterology
https://www.readbyqxmd.com/read/28405994/vertical-transmission-of-chikungunya-manifesting-as-foetal-pericardial-effusion
#11
Aruna Nigam, Sumedha Sharma, Abhinav Jain, Anuj Gupta, Anupam Prakash
Chikungunya fever is believed to be a self-limiting illness, which can result in significant disability, but with a very low mortality. Chikungunya is uncommonly believed to be associated with serious manifestations. The present case is of a pregnant lady who had transient fever for two days in the third trimester, following which she developed foetal pericardial effusion and intrauterine growth restriction. After two weeks of the fever, in view of non-reactive non-stress test, breech and foetal pericardial effusion, patient was taken up for caesarean section...
December 2016: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28402784/defining-the-pathways-of-symbiotic-epichlo%C3%A3-colonization-in-grass-embryos-with-confocal-microscopy
#12
Wei Zhang, Stuart D Card, Wade J Mace, Michael J Christensen, Craig R McGill, Cory Matthew
Asexual cool-season grass endophytes of the genus Epichloë (Ascomycota: Clavicipitaceae) are strictly vertically disseminated. The hosts of these mutualistic fungi express no symptoms during the fungal lifecycle that takes place entirely within the plant, while their hosts receive beneficial outcomes. These fungi are distributed in two major locations within the mature seeds of their hosts; namely, within the embryo (including the scutellum, coleoptile, plumule, radicle, and coleorhiza tissues) and between the aleurone and pericarp layers, with the latter hyphae playing no role in transmission of the fungus to the next plant generation...
2017: Mycologia
https://www.readbyqxmd.com/read/28401776/molecular-characteristics-of-the-envelope-of-vertically-transmitted-hiv-1-strains-from-infants-with-hiv-infection
#13
Manickam Ashokkumar, Manohar Nesakumar, Cheedarla Narayanaiah, Vidya Vijayan Kk, Babu Hemalatha, Srikanth P Tripathy, Luke Elizabeth Hanna
Mother-to-child transmission of HIV offers a good opportunity to study the dynamics of early viral evolution in the host environment to which the virus has partially adapted. Such studies would throw light on the unique features of the infecting viruses, which will subsequently help to design preventive or therapeutic measures against the newly infecting and evolving strains of HIV. Therefore, we undertook a study to determine the genetic divergence of proviral envelope sequences from the HIV infected infants (< 2 years)...
April 12, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28399259/effect-of-rickettsia-felis-strain-variation-on-infection-transmission-and-fitness-in-the-cat-flea-siphonaptera-pulicidae
#14
Sean P Healy, Lisa D Brown, Melena R Hagstrom, Lane D Foil, Kevin R Macaluso
Rickettsia felis is a human pathogen transmitted by the cat flea, Ctenocephalides felis (Bouché) (str. LSU), as well as an obligate symbiont of the parthenogenic booklouse Liposcelis bostrychophila (Badonnel) (str. LSU-Lb). The influence of genetic variability in these two strains of R. felis on host specialization and fitness and possible resulting differences on infection and transmission kinetics in C. felis is unknown. Utilizing an artificial host system, cat fleas were exposed to a R. felis str. LSU-Lb-infected bloodmeal and monitored for infection at 7-d intervals for 28 d...
March 2, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28399001/realizing-the-promise-of-the-global-plan-engaging-communities-and-promoting-the-health-and-human-rights-of-women-living-with-hiv
#15
Rebecca Matheson, Sophie Brion, Aditi Sharma, Sophie Dilmitis, Kathrin Schmitz, Stuart Kean, Katie Filous, Maurine Murenga, Esca Scheepers, Patricia Ukoli, Lillian Mworeko, Anandi Yuvaraj
The Global Plan Towards the Elimination of New HIV Infections Among Children by 2015 and Keeping Their Mothers Alive highlighted the need to put the health and well-being of women and mothers at the center of efforts to prevent vertical transmission. This article will examine a selection of community engagement practices in 3 key areas: (1) as an accountability tool, (2) in service delivery, and (3) as a facilitator of human rights. The lived experiences of women living with HIV as recipients of and participants in services for the prevention of vertical transmission provide both the framework for an exploration of best community engagement practices and suggestions for the way forward...
May 1, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28399000/overcoming-health-system-challenges-for-women-and-children-living-with-hiv-through-the-global-plan
#16
Surbhi Modi, Tegan Callahan, Jessica Rodrigues, Mwikemo D Kajoka, Helen M Dale, Judite O Langa, Marilena Urso, Matsepeli I Nchephe, Helene Bongdene, Sostena Romano, Laura N Broyles
To meet the ambitious targets set by the Global Plan Towards the Elimination of New HIV Infections Among Children by 2015 and Keeping Their Mothers Alive (Global Plan), the initial 22 priority countries quickly developed innovative approaches for overcoming long-standing health systems challenges and providing HIV testing and treatment to pregnant and breastfeeding women and their infants. The Global Plan spurred programs for prevention of mother-to-child HIV transmission to integrate HIV-related care and treatment into broader maternal, newborn, and child health services; expand the effectiveness of the health workforce through task sharing; extend health services into communities; strengthen supply chain and commodity management systems; reduce diagnostic and laboratory hurdles; and strengthen strategic supervision and mentorship...
May 1, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28398992/translating-technical-support-into-country-action-the-role-of-the-interagency-task-team-on-the-prevention-and-treatment-of-hiv-infection-in-pregnant-women-mothers-and-children-in-the-global-plan-era
#17
Chewe Luo, Gottfried Hirnschall, Jessica Rodrigues, Sostena Romano, Shaffiq Essajee, Braeden Rogers, Elizabeth McCarthy, Albert Mwango, Nalinee Sangrujee, Michelle R Adler, James C Houston, Judite O Langa, Marilena Urso, Omotayo Bolu, Gilbert Tene, Jean B Elat Nfetam, Etienne Kembou, Benjamin R Phelps
While the Interagency Task Team on the Prevention and Treatment of HIV Infection in Pregnant Women, Mothers, and Children (IATT) partnership existed before the Global Plan Towards the Elimination of New HIV Infections Among Children by 2015 and Keeping Their Mothers Alive (Global Plan), its reconfiguration was critical to coordinating provision of technical assistance that positively influenced country decision-making and program performance. This article describes how the Global Plan anchored the work of the IATT and, in turn, how the IATT's technical assistance helped to accelerate achievement of the Global Plan targets and milestones...
May 1, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28398683/update-on-syphilis-and-pregnancy
#18
REVIEW
Michael E Tsimis, Jeanne S Sheffield
While the origins of syphilis remain unknown, it has long been recognized as an infectious entity with complex pathophysiology. In this review, we highlighted the epidemiology and risk factors associated with syphilis. The incidence of syphilis in most populations showed a consistent upward trend until the 1940s with the introduction of penicillin as the preferred treatment. The emergence of congenital syphilis and vertical transmission has been a direct result of heterosexual syphilis transmission. We also explore the microbiology and pathogenesis of Treponema pallidum as it directly correlates with its route of transmission and infectivity...
March 15, 2017: Birth Defects Res
https://www.readbyqxmd.com/read/28398096/advances-in-therapy-for-the-prevention-of-hiv-transmission-from-mother-to-child
#19
Marcela A Moretton, Facundo Bertera, Eduardo Lagomarsino, Jennifer Riedel, Diego A Chiappetta, Christian Höcht
Actually, ~17.8 million women and 1.8 million children (<15 years) are currently infected with the Human Immunodeficiency Virus (HIV)/Acquired Immunodeficiency Syndrome (AIDS). Particularly, the majority of pediatric infections (>90%) resulted from "HIV mother-to-child transmission" (MTCT), both in pregnancy, labour, delivery and later by breastfeeding. Due to its high pediatric incidence, MTCT represents a public health concern. Areas covered: In this review, we focus on available treatments and antiretroviral drugs recommended by the World Health Organization, and the main clinical investigations in antiretroviral pharmacotherapy to prevent the MTCT...
April 11, 2017: Expert Opinion on Pharmacotherapy
https://www.readbyqxmd.com/read/28396992/viral-infection-proliferation-and-hyperplasia-of-hofbauer-cells-and-absence-of-inflammation-characterize-the-placental-pathology-of-fetuses-with-congenital-zika-virus-infection
#20
REVIEW
David A Schwartz
PURPOSE: Attention is increasingly focused on the potential mechanism(s) for Zika virus infection to be transmitted from an infected mother to her fetus. This communication addresses current evidence for the role of the placenta in vertical transmission of the Zika virus. METHODS: Placentas from second and third trimester fetuses with confirmed intrauterine Zika virus infection were examined with routine staining to determine the spectrum of pathologic changes. In addition, immunohistochemical staining for macrophages and nuclear proliferation antigens was performed...
April 11, 2017: Archives of Gynecology and Obstetrics
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