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https://www.readbyqxmd.com/read/29110932/dengue-vaccine-supplies-under-endemic-and-epidemic-conditions-in-three-dengue-endemic-countries-colombia-thailand-and-vietnam
#1
Jung-Seok Lee, Jacqueline K Lim, Duc Anh Dang, Thi Hien Anh Nguyen, Andrew Farlow
BACKGROUND: Dengue fever has been a major public health concern in Colombia, Thailand, and Vietnam. Unlike other infectious diseases, dengue vaccines had not been available for a long time, causing difficulties to control the disease. However, the first live attenuated, tetravalent dengue vaccine (CYD-TDV) became available in 2016 and has been already licensed in some dengue-endemic countries. Because several second-generation dengue vaccines are also in the pipeline, it is critical to understand the efficient allocation of dengue vaccines considering the geographical variation of the disease...
October 27, 2017: Vaccine
https://www.readbyqxmd.com/read/29091713/after-the-epidemic-zika-virus-projections-for-latin-america-and-the-caribbean
#2
Felipe J Colón-González, Carlos A Peres, Christine Steiner São Bernardo, Paul R Hunter, Iain R Lake
BACKGROUND: Zika is one of the most challenging emergent vector-borne diseases, yet its future public health impact remains unclear. Zika was of little public health concern until recent reports of its association with congenital syndromes. By 3 August 2017 ∼217,000 Zika cases and ∼3,400 cases of associated congenital syndrome were reported in Latin America and the Caribbean. Some modelling exercises suggest that Zika virus infection could become endemic in agreement with recent declarations from the The World Health Organisation...
November 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29084220/a-multi-country-study-of-the-economic-burden-of-dengue-fever-vietnam-thailand-and-colombia
#3
Jung-Seok Lee, Vittal Mogasale, Jacqueline K Lim, Mabel Carabali, Kang-Sung Lee, Chukiat Sirivichayakul, Duc Anh Dang, Diana Cristina Palencia-Florez, Thi Hien Anh Nguyen, Arthorn Riewpaiboon, Pornthep Chanthavanich, Luis Villar, Brian A Maskery, Andrew Farlow
BACKGROUND: Dengue fever is a major public health concern in many parts of the tropics and subtropics. The first dengue vaccine has already been licensed in six countries. Given the growing interests in the effective use of the vaccine, it is critical to understand the economic burden of dengue fever to guide decision-makers in setting health policy priorities. METHODS/PRINCIPAL FINDINGS: A standardized cost-of-illness study was conducted in three dengue endemic countries: Vietnam, Thailand, and Colombia...
October 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29076644/image-enhancement-variational-methods-for-enabling-strong-cost-reduction-in-oled-based-point-of-care-immunofluorescent-diagnostic-systems
#4
Damiana Lazzaro, Serena Morigi, Patrizia Melpignano, Elena Piccolomini, Luca Benini
OBJECTIVE: Immunofluorescence diagnostic systems cost is often dominated by high-sensitivity, low-noise CCD-based cameras which are used to acquire the fluorescence images. In this paper we investigate the use of low-cost CMOS sensors in a point-of-care immunofluorescence diagnostic application for the detection and discrimination of four different serotypes of the Dengue virus in a set of human samples. METHODS: A two-phase post-processing software pipeline is proposed which consists in a first image enhancement stage for resolution increasing and segmentation, and a second diagnosis stage for the computation of the output concentrations...
October 27, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/29066710/citizen-science-provides-a-reliable-and-scalable-tool-to-track-disease-carrying-mosquitoes
#5
John R B Palmer, Aitana Oltra, Francisco Collantes, Juan Antonio Delgado, Javier Lucientes, Sarah Delacour, Mikel Bengoa, Roger Eritja, Frederic Bartumeus
Recent outbreaks of Zika, chikungunya and dengue highlight the importance of better understanding the spread of disease-carrying mosquitoes across multiple spatio-temporal scales. Traditional surveillance tools are limited by jurisdictional boundaries and cost constraints. Here we show how a scalable citizen science system can solve this problem by combining citizen scientists' observations with expert validation and correcting for sampling effort. Our system provides accurate early warning information about the Asian tiger mosquito (Aedes albopictus) invasion in Spain, well beyond that available from traditional methods, and vital for public health services...
October 24, 2017: Nature Communications
https://www.readbyqxmd.com/read/29031082/quantum-associative-memory-with-linear-and-non-linear-algorithms-for-the-diagnosis-of-some-tropical-diseases
#6
J-P Tchapet Njafa, S G Nana Engo
This paper presents the QAMDiagnos, a model of Quantum Associative Memory (QAM) that can be a helpful tool for medical staff without experience or laboratory facilities, for the diagnosis of four tropical diseases (malaria, typhoid fever, yellow fever and dengue) which have several similar signs and symptoms. The memory can distinguish a single infection from a polyinfection. Our model is a combination of the improved versions of the original linear quantum retrieving algorithm proposed by Ventura and the non-linear quantum search algorithm of Abrams and Lloyd...
September 21, 2017: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/29018222/spatial-temporal-distribution-of-dengue-and-climate-characteristics-for-two-clusters-in-sri-lanka-from-2012-to-2016
#7
Wei Sun, Ling Xue, Xiaoxue Xie
Dengue is a vector-borne disease causing high morbidity and mortality in tropical and subtropical countries. Urbanization, globalization, and lack of effective mosquito control have lead to dramatically increased frequency and magnitude of dengue epidemic in the past 40 years. The virus and the mosquito vectors keep expanding geographically in the tropical regions of the world. Using the hot spot analysis and the spatial-temporal clustering method, we investigated the spatial-temporal distribution of dengue in Sri Lanka from 2012 to 2016 to identify spatial-temporal clusters and elucidate the association of climatic factors with dengue incidence...
October 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28964768/clinical-laboratory-and-demographic-determinants-of-hospitalization-due-to-dengue-in-7613-patients-a-retrospective-study-based-on-hierarchical-models
#8
Natal Santos da Silva, Eduardo A Undurraga, Elis Regina da Silva Ferreira, Cássia Fernanda Estofolete, Maurício Lacerda Nogueira
In Brazil, the incidence of hospitalization due to dengue, as an indicator of severity, has drastically increased since 1998. The objective of our study was to identify risk factors associated with subsequent hospitalization related to dengue. We analyzed 7613 dengue confirmed via serology (ELISA), non-structural protein 1, or polymerase chain reaction amplification. We used a hierarchical framework to generate a multivariate logistic regression based on a variety of risk variables. This was followed by multiple statistical analyses to assess hierarchical model accuracy, variance, goodness of fit, and whether or not this model reliably represented the population...
September 28, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28956768/differentiated-sh-sy5y-human-cells-provide-a-reductionist-model-of-hsv-1-neurotropism
#9
Mackenzie M Shipley, Colleen A Mangold, Chad V Kuny, Moriah L Szpara
Neuron-virus interactions that occur during herpes simplex virus (HSV) infection are not fully understood. Neurons are the site of lifelong latency and are a crucial target for long-term suppressive therapy or viral clearance. A reproducible neuronal model of human origin would facilitate studies of HSV and other neurotropic viruses. Current neuronal models in the herpesvirus field vary widely and have caveats including incomplete differentiation, non-human origins, or the use of dividing cells that have neuropotential, but lack neuronal morphology...
September 27, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28954927/rapid-antigen-tests-for-dengue-virus-serotypes-and-zika-virus-in-patient-serum
#10
Irene Bosch, Helena de Puig, Megan Hiley, Marc Carré-Camps, Federico Perdomo-Celis, Carlos F Narváez, Doris M Salgado, Dewahar Senthoor, Madeline O'Grady, Elizabeth Phillips, Ann Durbin, Diana Fandos, Hikaru Miyazaki, Chun-Wan Yen, Margarita Gélvez-Ramírez, Rajas V Warke, Lucas S Ribeiro, Mauro M Teixeira, Roque P Almeida, José E Muñóz-Medina, Juan E Ludert, Mauricio L Nogueira, Tatiana E Colombo, Ana C B Terzian, Patricia T Bozza, Andrea S Calheiros, Yasmine R Vieira, Giselle Barbosa-Lima, Alexandre Vizzoni, José Cerbino-Neto, Fernando A Bozza, Thiago M L Souza, Monique R O Trugilho, Ana M B de Filippis, Patricia C de Sequeira, Ernesto T A Marques, Tereza Magalhaes, Francisco J Díaz, Berta N Restrepo, Katerine Marín, Salim Mattar, Daniel Olson, Edwin J Asturias, Mark Lucera, Mohit Singla, Guruprasad R Medigeshi, Norma de Bosch, Justina Tam, Jose Gómez-Márquez, Charles Clavet, Luis Villar, Kimberly Hamad-Schifferli, Lee Gehrke
The recent Zika virus (ZIKV) outbreak demonstrates that cost-effective clinical diagnostics are urgently needed to detect and distinguish viral infections to improve patient care. Unlike dengue virus (DENV), ZIKV infections during pregnancy correlate with severe birth defects, including microcephaly and neurological disorders. Because ZIKV and DENV are related flaviviruses, their homologous proteins and nucleic acids can cause cross-reactions and false-positive results in molecular, antigenic, and serologic diagnostics...
September 27, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28937986/household-costs-of-hospitalized-dengue-illness-in-semi-rural-thailand
#11
Yesim Tozan, Pitcha Ratanawong, Maquines Odhiambo Sewe, Annelies Wilder-Smith, Pattamaporn Kittayapong
BACKGROUND: Dengue-related illness is a leading cause of hospitalization and death in Thailand and other Southeast Asian countries, imposing a major economic burden on households, health systems, and governments. This study aims to assess the economic impact of hospitalized dengue cases on households in Chachoengsao province in eastern Thailand. METHODS: We conducted a prospective cost-of-illness study of hospitalized pediatric and adult dengue patients at three public hospitals...
September 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28933657/a-novel-immunization-approach-for-dengue-infection-based-on-conserved-t-cell-epitopes-formulated-in-calcium-phosphate-nanoparticles
#12
Xiaofang Huang, Aykan Karabudak, Joseph D Comber, Mohan Philip, Tulin Morcol, Ramila Philip
Dengue virus (DV) is the etiologic agent of dengue fever, the most significant mosquito-borne viral disease in humans. Most DV vaccine approaches are focused on generating antibody mediated responses; one such DV vaccine is approved for use in humans but its efficacy is limited. While it is clear that T cell responses play important role in DV infection and subsequent disease manifestations, fewer studies are aimed at developing vaccines that induce robust T cells responses. Potent T cell based vaccines require two critical components: the identification of specific T cell stimulating MHC associated peptides, and an optimized vaccine delivery vehicle capable of simultaneously delivering the antigens and any required adjuvants...
September 21, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28932235/zika-virus-congenital-syndrome-experimental-models-and-clinical-aspects
#13
REVIEW
Carolina Manganeli Polonio, Carla Longo de Freitas, Nagela Ghabdan Zanluqui, Jean Pierre Schatzmann Peron
Viral infections have long been the cause of severe diseases to humans, increasing morbidity and mortality rates worldwide, either in rich or poor countries. Yellow fever virus, H1N1 virus, HIV, dengue virus, hepatitis B and C are well known threats to human health, being responsible for many million deaths annually, associated to a huge economic and social cost. In this context, a recently introduced flavivirus in South America, called Zika virus (ZIKV), led the WHO to declare in February 1st 2016 a warning on Public Health Emergency of International Concern (PHEIC)...
2017: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/28924277/clinical-outcomes-of-prophylactic-platelet-transfusion-in-patients-with-dengue-a-retrospective-study-of-patients-at-a-tertiary-care-hospital-in-karachi
#14
Sher Muhammad Sethi, Ayesha Khalil, Muhammad Rashid Naseem Khan, Adeel Khatri, Asif Jan Muhammad, Ghulam Murtaza
OBJECTIVE: To determine the benefit of prophylactic platelet transfusion on clinical outcomes in patients with dengue fever. METHODS: The retrospective cohort study was conducted at Patel Hospital, Karachi, and comprised record of patients fulfilling World Health Organisation's diagnostic criteria for dengue between 2009 and 2015. We excluded patients with known auto-immune thrombocytopenia, isolated infection with a pathogen other than dengue virus, drug-induced thrombocytopenia and patients requiring therapeutic transfusion...
September 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28914200/development-of-peptide-vaccines-in-dengue
#15
Kavita Reginald, Yanqi Chan, Magdalena Plebanski, Chit Laa Poh
Dengue is one of the most important arboviral infection worldwide, infecting up to 390 million people and causing 25,000 deaths annually. Although a licensed dengue vaccine is available, it is not efficacious against dengue serotypes that infect people living in South East Asia, where dengue is an endemic disease. Hence, there is an urgent need to develop an efficient dengue vaccine for this region. Data from different clinical trials indicate that a successful dengue vaccine must elicit both neutralizing antibodies and cell mediated immunity...
September 13, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28903515/update-from-the-advisory-committee-on-immunization-practices
#16
Sean T O'Leary, Yvonne A Maldonado, Carrie L Byington
The Advisory Committee on Immunization Practices (ACIP), a group of medical and public health experts, meets 3 times per year to develop recommendations for vaccine use in the United States. The group has 15 voting members, and each member's term is 4 years. ACIP members and Centers for Disease Control and Prevention (CDC) staff discuss the epidemiology of vaccine-preventable diseases and vaccine research, effectiveness, safety data, and clinical trial results. Representatives from the American Academy of Pediatrics (C...
September 1, 2017: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/28893984/nanoswitch-linked-immunosorbent-assay-nlisa-for-fast-sensitive-and-specific-protein-detection
#17
Clinton H Hansen, Darren Yang, Mounir A Koussa, Wesley P Wong
Protein detection and quantification play critical roles in both basic research and clinical practice. Current detection platforms range from the widely used ELISA to more sophisticated, and more expensive, approaches such as digital ELISA. Despite advances, there remains a need for a method that combines the simplicity and cost-effectiveness of ELISA with the sensitivity and speed of modern approaches in a format suitable for both laboratory and rapid, point-of-care applications. Building on recent developments in DNA structural nanotechnology, we introduce the nanoswitch-linked immunosorbent assay (NLISA), a detection platform based on easily constructed DNA nanodevices that change conformation upon binding to a target protein with the results read out by gel electrophoresis...
September 26, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28892499/effectiveness-and-economic-assessment-of-routine-larviciding-for-prevention-of-chikungunya-and-dengue-in-temperate-urban-settings-in-europe
#18
Giorgio Guzzetta, Filippo Trentini, Piero Poletti, Frederic Alexandre Baldacchino, Fabrizio Montarsi, Gioia Capelli, Annapaola Rizzoli, Roberto Rosà, Stefano Merler, Alessia Melegaro
In the last decades, several European countries where arboviral infections are not endemic have faced outbreaks of diseases such as chikungunya and dengue, initially introduced by infectious travellers from tropical endemic areas and then spread locally via mosquito bites. To keep in check the epidemiological risk, interventions targeted to control vector abundance can be implemented by local authorities. We assessed the epidemiological effectiveness and economic costs and benefits of routine larviciding in European towns with temperate climate, using a mathematical model of Aedes albopictus populations and viral transmission, calibrated on entomological surveillance data collected from ten municipalities in Northern Italy during 2014 and 2015...
September 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28865898/presence-of-a-predator-image-in-potential-breeding-sites-and-oviposition-responses-of-a-dengue-vector
#19
Hamady Dieng, Tomomitsu Satho, Nur Farrahana Binti Suradi, Hafijah Hakim, Fatimah Abang, Nur Ezzati Aliasan, Fumio Miake, Wan Fatma Zuharah, Nur Faeza A Kassim, Abdul Hafiz A Majid, Nik Fadzly, Ronald E Morales Vargas, Noppawan P Morales, Gabriel Tonga Noweg
In dengue vector control, attempts to minimize or replace the use of pesticides have mostly involved use of predators, but success has been severely impeded by difficulties associated with financial and environmental costs, predator mass production, and persistence in target habitats. Visual deterrents have been used successfully to control animal pests, in some cases in an effort to replace pesticide use. Despite evidence that visual signals are crucial in site choice for egg deposition by dengue vectors, and that female mosquitoes respond to artificial predation, the role of predator intimidation as it affects the oviposition behavior of dengue vectors remains largely unexplored...
December 2017: Acta Tropica
https://www.readbyqxmd.com/read/28859534/larvicidal-and-pupicidal-evaluation-of-silver-nanoparticles-synthesized-using-aquilaria-sinensis-and-pogostemon-cablin-essential-oils-against-dengue-and-zika-viruses-vector-aedes-albopictus-mosquito-and-its-histopathological-analysis
#20
Hassan Ga'al, Hatem Fouad, Guofeng Mao, Jiaxin Tian, Mo Jianchu
Mosquitoes pose a threat to humans and animals, causing millions of deaths every year. Vector control by effective eco-friendly pesticides of natural origin is a serious issue that requires urgent attention. The employment of green-reducing extracts for nanoparticles biosynthesis in a rapid and single-step process represents a promising strategy. In this study, silver nanoparticles (AgNPs) were biofabricated using an essential oil of Aquilaria sinensis (AsEO) and Pogostemonis Herba essential oil of Pogostemon cablin (PcEO) in one step and cost-effective manner...
August 31, 2017: Artificial Cells, Nanomedicine, and Biotechnology
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