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https://www.readbyqxmd.com/read/28225820/analysis-of-spatial-mobility-in-subjects-from-a-dengue-endemic-urban-locality-in-morelos-state-mexico
#1
Jorge Abelardo Falcón-Lezama, René Santos-Luna, Susana Román-Pérez, Ruth Aralí Martínez-Vega, Marco Arieli Herrera-Valdez, Ángel Fernando Kuri-Morales, Ben Adams, Pablo Antonio Kuri-Morales, Malaquías López-Cervantes, José Ramos-Castañeda
INTRODUCTION: Mathematical models and field data suggest that human mobility is an important driver for Dengue virus transmission. Nonetheless little is known on this matter due the lack of instruments for precise mobility quantification and study design difficulties. MATERIALS AND METHODS: We carried out a cohort-nested, case-control study with 126 individuals (42 cases, 42 intradomestic controls and 42 population controls) with the goal of describing human mobility patterns of recently Dengue virus-infected subjects, and comparing them with those of non-infected subjects living in an urban endemic locality...
2017: PloS One
https://www.readbyqxmd.com/read/28222903/modified-mrna-vaccines-protect-against-zika-virus-infection
#2
Justin M Richner, Sunny Himansu, Kimberly A Dowd, Scott L Butler, Vanessa Salazar, Julie M Fox, Justin G Julander, William W Tang, Sujan Shresta, Theodore C Pierson, Giuseppe Ciaramella, Michael S Diamond
The emergence of ZIKV infection has prompted a global effort to develop safe and effective vaccines. We engineered a lipid nanoparticle (LNP) encapsulated modified mRNA vaccine encoding wild-type or variant ZIKV structural genes and tested immunogenicity and protection in mice. Two doses of modified mRNA LNPs encoding prM-E genes that produced virus-like particles resulted in high neutralizing antibody titers (∼1/100,000) that protected against ZIKV infection and conferred sterilizing immunity. To offset a theoretical concern of ZIKV vaccines inducing antibodies that cross-react with the related dengue virus (DENV), we designed modified prM-E RNA encoding mutations destroying the conserved fusion-loop epitope in the E protein...
February 16, 2017: Cell
https://www.readbyqxmd.com/read/28212349/household-dengue-prevention-interventions-expenditures-and-barriers-to-aedes-aegypti-control-in-machala-ecuador
#3
Naveed Heydari, David A Larsen, Marco Neira, Efraín Beltrán Ayala, Prissila Fernandez, Jefferson Adrian, Rosemary Rochford, Anna M Stewart-Ibarra
The Aedes aegypti mosquito is an efficient vector for the transmission of Zika, chikungunya, and dengue viruses, causing major epidemics and a significant social and economic burden throughout the tropics and subtropics. The primary means of preventing these diseases is household-level mosquito control. However, relatively little is known about the economic burden of Ae. aegypti control in resource-limited communities. We surveyed residents from 40 households in a high-risk community at the urban periphery in the city of Machala, Ecuador, on dengue perceptions, vector control interventions, household expenditures, and factors influencing purchasing decisions...
February 16, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28210223/consumer-willingness-to-pay-for-dengue-vaccine-cyd-tdv-dengvaxia-%C3%A2-in-brazil-implications-for-future-pricing-considerations
#4
Isabella P Godói, André S Santos, Edna A Reis, Livia L P Lemos, Cristina M R Brandão, Juliana Alvares, Francisco A Acurcio, Brian Godman, Augusto A Guerra Júnior
Introduction and Objective: Dengue virus is a serious global health problem with an estimated 3.97 billion people at risk for infection worldwide. In December 2015, the first vaccine (CYD-TDV) for dengue prevention was approved in Brazil, developed by Sanofi Pasteur. However, given that the vaccine will potentially be paid via the public health system, information is need regarding consumers' willingness to pay for the dengue vaccine in the country as well as discussions related to the possible inclusion of this vaccine into the public health system...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28207838/viperin-interaction-with-mitochondrial-antiviral-signaling-protein-mavs-limits-viperin-mediated-inhibition-of-the-interferon-response-in-macrophages
#5
Jia Shee Hee, Peter Cresswell
Viperin is an antiviral protein that is upregulated by interferons and by ligands for a variety of innate immune receptors. It possesses diverse capabilities and functions in an array of viral infections. Studies have shown that it appears to be particularly important in defence against RNA viruses, such as West Nile, Dengue, and Chikungunya viruses, although the specific mechanisms involved are not well understood at the molecular level. Here we identify the mitochondrial antiviral signalling protein MAVS as a novel viperin interaction partner, most likely in mitochondria associated membranes, and characterize a more central, overarching role of viperin as a negative regulator of the interferon response, an ability that can be regulated by the viperin-MAVS interaction...
2017: PloS One
https://www.readbyqxmd.com/read/28199323/a-large-scale-biorational-approach-using-bacillus-thuringiensis-israeliensis-strain-am65-52-for-managing-aedes-aegypti-populations-to-prevent-dengue-chikungunya-and-zika-transmission
#6
Catherine A Pruszynski, Lawrence J Hribar, Robert Mickle, Andrea L Leal
BACKGROUND: Aedes aegypti is a container-inhabiting mosquito and a vector of dengue, chikungunya, and Zika viruses. In 2009 several cases of autochthonous dengue transmission were reported in Key West, Florida, USA prompting a comprehensive response to control A. aegypti. In Key West, larvae of this mosquito develop in containers around human habitations which can be numerous and labor intensive to find and treat. Aerial applications of larvicide covering large areas in a short time can be an efficient and economical method to control A...
2017: PloS One
https://www.readbyqxmd.com/read/28198645/three-decades-of-dengue-surveillance-in-five-highly-endemic-south-east-asian-countries
#7
T A Wartel, A Prayitno, S R S Hadinegoro, M R Capeding, U Thisyakorn, N H Tran, A Moureau, A Bouckenooghe, J Nealon, A-F Taurel
We described and quantified epidemiologic trends in dengue disease burden in 5 Asian countries (Indonesia, Thailand, Malaysia, Philippines, and Vietnam) and identified and estimated outbreaks impact over the last 3 decades. Dengue surveillance data from 1980 to 2010 were retrieved from DengueNet and from World Health Organization sources. Trends in incidence, mortality, and case fatality rate (CFR) were systematically analyzed using annual average percent change (AAPC), and the contribution of epidemic years identified over the observation period was quantified...
January 2017: Asia-Pacific Journal of Public Health
https://www.readbyqxmd.com/read/28197304/ester-prodrugs-of-ihvr-19029-with-enhanced-oral-exposure-and-prevention-of-gastrointestinal-glucosidase-interaction
#8
Julia Ma, Shuo Wu, Xuexiang Zhang, Fang Guo, Katherine Yang, Jia Guo, Qing Su, Huagang Lu, Patrick Lam, Yuhuan Li, Zhengyin Yan, William Kinney, Ju-Tao Guo, Timothy M Block, Jinhong Chang, Yanming Du
IHVR-19029 (6) is a lead endoplasmic reticulum α-glucosidases I and II inhibitor, which efficiently protected mice from lethal Ebola and Marburg virus infections via injection route, but suffered from low bioavailability and off-target interactions with gut glucosidases when administered orally. In an effort to improve efficacious exposure levels and avoid side effects, we designed and synthesized ester prodrugs. Not only were the prodrugs stable in simulated gastric and intestinal fluids and were inactive against glucosidases but they also exhibited antiviral activities against dengue virus infection in a cell based assay...
February 9, 2017: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28193746/dengue-virus-exposures-among-deployed-u-s-military-personnel
#9
Elisabeth M Hesse, Luis J Martinez, Richard G Jarman, Arthur G Lyons, Kenneth H Eckels, Rafael A De La Barrera, Stephen J Thomas
Dengue virus infections have adversely impacted U.S. military operations since the Spanish-American War. The erosion of mission capabilities and lost duty days are underestimated. Appreciating the incidence and prevalence of dengue infections in U.S. military personnel is important to inform disease prevention strategies. Banked pre- and post-deployment serum samples from 1,000 U.S. military personnel with a single deployment to a dengue-endemic region were tested using a screening microneutralization assay to detect anti-dengue-virus-neutralizing antibodies...
February 13, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28192520/holding-back-the-tiger-successful-control-program-protects-australia-from-aedes-albopictus-expansion
#10
Mutizwa Odwell Muzari, Gregor Devine, Joseph Davis, Bruce Crunkhorn, Andrew van den Hurk, Peter Whelan, Richard Russell, James Walker, Peter Horne, Gerhard Ehlers, Scott Ritchie
BACKGROUND: The Asian tiger mosquito, Aedes albopictus, is an important vector of dengue, chikungunya and Zika viruses and is a highly invasive and aggressive biter. Established populations of this species were first recognised in Australia in 2005 when they were discovered on islands in the Torres Strait, between mainland Australia and Papua New Guinea. A control program was implemented with the original goal of eliminating Ae. albopictus from the Torres Strait. We describe the evolution of management strategies that provide a template for Ae...
February 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28187147/widespread-fear-of-dengue-transmission-but-poor-practices-of-dengue-prevention-a-study-in-the-slums-of-delhi-india
#11
Éric Daudé, Sumit Mazumdar, Vandana Solanki
BACKGROUND: This study has been conducted to throw light on the knowledge and practices related to dengue fever among the poor population living in Delhi's slums. MATERIALS: A household survey was conducted in 2013 among 3,350 households. The households were stratified by a number of variables related to socio-economic status and health events such as hospitalisation. The data collection was completed through face-to-face interviews conducted with the help of 25 field investigators...
2017: PloS One
https://www.readbyqxmd.com/read/28185870/prevention-and-control-of-dengue-the-light-at-the-end-of-the-tunnel
#12
REVIEW
Tikki Pang, Tippi K Mak, Duane J Gubler
Advances in the development of new dengue control tools, including vaccines and vector control, herald a new era of desperately needed dengue prevention and control. The burden of dengue has expanded for decades, and now affects more than 120 countries. Complex, large-scale global forces have and will continue to contribute to the expansion of dengue, including population growth, unplanned urbanisation, and suboptimal mosquito control in urban centres. Although no so-called magic bullets are available, there is new optimism following the first licensure of a dengue vaccine and other promising vaccine candidates, and the development of novel vector control interventions to help control dengue and other expanding mosquito-borne diseases such as Zika virus...
February 6, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28185868/dengue-knowledge-gaps-unmet-needs-and-research-priorities
#13
REVIEW
Leah C Katzelnick, Josefina Coloma, Eva Harris
Dengue virus is a mosquito-borne pathogen that causes up to about 100 million cases of disease each year, placing a major public health, social, and economic burden on numerous low-income and middle-income countries. Major advances by investigators, vaccine developers, and affected communities are revealing new insights and enabling novel interventions and approaches to dengue prevention and control. Such research has highlighted further questions about both the basic understanding of dengue and efforts to develop new tools...
February 6, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28157234/the-citrus-flavanone-naringenin-impairs-dengue-virus-replication-in-human-cells
#14
Sandra Frabasile, Andrea Cristine Koishi, Diogo Kuczera, Guilherme Ferreira Silveira, Waldiceu Aparecido Verri, Claudia Nunes Duarte Dos Santos, Juliano Bordignon
Dengue is one of the most significant health problems in tropical and sub-tropical regions throughout the world. Nearly 390 million cases are reported each year. Although a vaccine was recently approved in certain countries, an anti-dengue virus drug is still needed. Fruits and vegetables may be sources of compounds with medicinal properties, such as flavonoids. This study demonstrates the anti-dengue virus activity of the citrus flavanone naringenin, a class of flavonoid. Naringenin prevented infection with four dengue virus serotypes in Huh7...
February 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28154363/how-did-the-dengue-fever-outbreak-progress-in-yoyogi-park-tokyo-in-2014-evaluation-based-on-a-mathematical-model
#15
Hirofumi Ishikawa, Rieko Shimogawara, Kaoru Fueda
OBJECTIVES: In the summer of 2014, an outbreak of autochthonous dengue fever occurred in Yoyogi Park and its vicinity, Tokyo, Japan. In this study, we investigated how the dengue fever outbreak progressed in Yoyogi Park using a mathematical model. METHODS: This study was limited to the transmission of the dengue virus in Yoyogi Park and its vicinity. We estimated the distributions of the intrinsic incubation period and infection dates on the basis of epidemiological information on the dengue outbreak in 2014...
2017: Nihon Eiseigaku Zasshi. Japanese Journal of Hygiene
https://www.readbyqxmd.com/read/28148289/a-rare-case-of-dengue-encephalopathy-complicating-a-term-pregnancy
#16
Lavanya Rajagopala, Ravindra L Satharasinghe, Madhava Karunarathna
BACKGROUND: Dengue fever has an expanded clinical spectrum ranging from an asymptomatic infection to life threatening dengue hemorrhagic fever and refractory shock. Dengue infection in pregnancy can be a diagnostic dilemma, particularly considering the physiological changes in pregnancy and the obstetric complications encountered in clinical practice. Hence the knowledge of its diagnosis and management in its atypical presentations is of paramount importance. Here we report an unusual case of uncomplicated dengue encephalopathy in a term mother, probably the first to be reported from the Indian subcontinent...
February 2, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28138048/clinician-survey-to-determine-knowledge-of-dengue-and-clinical-management-practices-texas-2014
#17
Jessica K Adam, Roman Abeyta, Brian Smith, Linda Gaul, Dana L Thomas, George Han, Tyler M Sharp, Stephen H Waterman, Kay M Tomashek
Dengue, a mosquito-borne viral disease, is increasingly being identified as a cause of outbreaks in the United States. During July-December 2013, a total of three south Texas counties reported 53 laboratory-confirmed dengue cases; 26 were locally acquired, constituting the largest outbreak in Texas since 2005. Because dengue outbreaks are expected to continue in south Texas and early case identification and timely treatment can reduce mortality, we sought to determine clinicians' knowledge of dengue and its clinical management...
January 30, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28131369/neotropical-primary-bat-cell-lines-show-restricted-dengue-virus-replication
#18
Andrés Moreira-Soto, Claudio Soto-Garita, Eugenia Corrales-Aguilar
Dengue is the most widespread arboviral disease affecting humans. Bats are recognized carriers of emerging viral zoonoses and have been proposed as dengue reservoirs, since RNA/NS1 and/or antiviral antibodies have been detected. Yet, experimental inoculation of Artibeus bats failed to show virus replication. This conflicting results prevent drawing further conclusions of whether bats sustain dengue infection. To test bat cellular permissivity to dengue infection, we established primary bat embryonic cells from diverse organs and tissues of Artibeus jamaicensis, Molossus sinaloae, and Desmodus rotundus...
February 2017: Comparative Immunology, Microbiology and Infectious Diseases
https://www.readbyqxmd.com/read/28126818/igg-antibodies-to-dengue-enhanced-for-fc%C3%AE-riiia-binding-determine-disease-severity
#19
Taia T Wang, Jaturong Sewatanon, Matthew J Memoli, Jens Wrammert, Stylianos Bournazos, Siddhartha Kumar Bhaumik, Benjamin A Pinsky, Kulkanya Chokephaibulkit, Nattawat Onlamoon, Kovit Pattanapanyasat, Jeffery K Taubenberger, Rafi Ahmed, Jeffrey V Ravetch
Dengue virus (DENV) infection in the presence of reactive, non-neutralizing immunoglobulin G (IgG) (RNNIg) is the greatest risk factor for dengue hemorrhagic fever (DHF) or dengue shock syndrome (DSS). Progression to DHF/DSS is attributed to antibody-dependent enhancement (ADE); however, because only a fraction of infections occurring in the presence of RNNIg advance to DHF/DSS, the presence of RNNIg alone cannot account for disease severity. We discovered that DHF/DSS patients respond to infection by producing IgGs with enhanced affinity for the activating Fc receptor FcγRIIIA due to afucosylated Fc glycans and IgG1 subclass...
January 27, 2017: Science
https://www.readbyqxmd.com/read/28116673/preventive-and-therapeutic-challenges-in-combating-zika-virus-infection-are-we-getting-any-closer
#20
REVIEW
Meera V Singh, Emily A Weber, Vir B Singh, Nicole E Stirpe, Sanjay B Maggirwar
The neuroteratogenic nature of Zika Virus (ZIKV) infection has converted what would have been a tropical disease into a global threat. Zika is transmitted vertically via infected placental cells especially in the first and second trimesters. In the developing central nervous system (CNS), ZIKV can infect and induce apoptosis of neural progenitor cells subsequently causing microcephaly as well as other neuronal complications in infants. Its ability to infect multiple cell types (placental, dermal, and neural) and increased environmental stability as compared to other flaviviruses (FVs) has broadened the transmission routes for ZIKV infection from vector-mediated to transmitted via body fluids...
January 23, 2017: Journal of Neurovirology
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