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https://www.readbyqxmd.com/read/28933657/a-novel-immunization-approach-for-dengue-infection-based-on-conserved-t-cell-epitopes-formulated-in-calcium-phosphate-nanoparticles
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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 11, 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
#7
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
#8
Hamady Dieng, Tomomitsu Satho, Nur Farrahana Binti Suradi, Fatimah Abang, Nur Ezzati Aliasan, Hafijah Hakim, 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...
August 30, 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
#9
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
https://www.readbyqxmd.com/read/28840606/high-estimated-prevalence-of-asymptomatic-dengue-viremia-in-blood-donors-during-a-dengue-epidemic-in-southern-taiwan-2015
#10
Yu-Wen Chien, Yu-Chen Shu, Kun-Ta Chuang, Chun-Yin Yeh, Wen-Chien Ko, Nai-Ying Ko, Guey-Chuen Perng
BACKGROUND: Southern Taiwan experienced a severe dengue epidemic in 2015. Adult asymptomatic cases would raise concerns on transfusion-transmitted dengue virus (DENV) infection. The aim of this study was to evaluate the magnitude of such a risk in Tainan City during this epidemic. STUDY DESIGN AND METHODS: The daily prevalence of asymptomatic dengue viremia in blood donors in Tainan City and in selected high-incidence districts during the 2015 dengue epidemic was estimated by an established mathematical model...
August 24, 2017: Transfusion
https://www.readbyqxmd.com/read/28820690/scaling-up-of-an-innovative-intervention-to-reduce-risk-of-dengue-chikungunya-and-zika-transmission-in-uruguay-in-the-framework-of-an-intersectoral-approach-with-and-without-community-participation
#11
César Basso, Elsa García da Rosa, Rosario Lairihoy, Ruben M Caffera, Ingrid Roche, Cristina González, Ricardo da Rosa, Alexis Gularte, Eduardo Alfonso-Sierra, Max Petzold, Axel Kroeger, Johannes Sommerfeld
To contribute to the prevention of dengue, chikungunya, and Zika, a process of scaling up an innovative intervention to reduce Aedes aegypti habitats, was carried out in the city of Salto (Uruguay) based on a transdisciplinary analysis of the eco-bio-social determinants. The intervention in one-third of the city included the distributions of plastic bags for all households to collect all discarded water containers that were recollected by the Ministry of Health and the Municipality vector control services. The results were evaluated in 20 randomly assigned clusters of 100 households each, in the intervention and control arm...
August 7, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28817080/feasibility-study-of-an-optical-caustic-plasmonic-light-scattering-sensor-for-human-serum-anti-dengue-protein-e-antibody-detection
#12
Antonio A García, Lina S Franco, Miguel A Pirez-Gomez, José L Pech-Pacheco, Jorge F Mendez-Galvan, Carlos Machain-Williams, Lourdes Talavera-Aguilar, José H Espinosa-Carrillo, Miriam M Duarte-Villaseñor, Christian Be-Ortiz, Luz E Espinosa-de Los Monteros, Ariel Castillo-Pacheco, Julian E Garcina-Rejon
Antibody detection and accurate diagnosis of tropical diseases is essential to help prevent the spread of disease. However, most detection methods lack cost-effectiveness and field portability, which are essential features for achieving diagnosis in a timely manner. To address this, 3D-printed oblate spheroid sample chambers were fabricated to measure green light scattering of gold nanoparticles using an optical caustic focus to detect antibodies. Scattering signals of 20-200 nm gold nanoparticles using a green laser were compared to green light emitting diode (LED) light source signals and to Mie theory...
August 17, 2017: Diagnostics
https://www.readbyqxmd.com/read/28814934/direct-medical-costs-of-dengue-fever-in-vietnam-a-retrospective-study-in-a-tertiary-hospital
#13
Nhung Thi Tuyet Vo, Trang Ngo Diem Phan, Trung Quang Vo
BACKGROUND: In Vietnam, dengue fever is a major health concern, yet comprehensive information on its economic costs is lacking. The present study investigated treatment costs associated with dengue fever from the perspective of health care provision. METHODS: This retrospective study was conducted between January 2013 and December 2015 in Cu Chi General Hospital. The following dengue-related treatment costs were calculated: hospitalisation, diagnosis, specialised services, drug usage and medical supplies...
May 2017: Malaysian Journal of Medical Sciences: MJMS
https://www.readbyqxmd.com/read/28806786/an-economic-evaluation-of-vector-control-in-the-age-of-a-dengue-vaccine
#14
Christopher Fitzpatrick, Alexander Haines, Mathieu Bangert, Andrew Farlow, Janet Hemingway, Raman Velayudhan
INTRODUCTION: Dengue is a rapidly emerging vector-borne Neglected Tropical Disease, with a 30-fold increase in the number of cases reported since 1960. The economic cost of the illness is measured in the billions of dollars annually. Environmental change and unplanned urbanization are conspiring to raise the health and economic cost even further beyond the reach of health systems and households. The health-sector response has depended in large part on control of the Aedes aegypti and Ae...
August 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28794424/virus-like-particles-that-display-zika-virus-envelope-protein-domain-iii-induce-potent-neutralizing-immune-responses-in-mice
#15
Ming Yang, Huafang Lai, Haiyan Sun, Qiang Chen
Several Zika virus (ZIKV) vaccine candidates have recently been described which use inactivated whole virus, DNA or RNA that express the virus' Envelope (E) glycoprotein as the antigen. These were successful in stimulating production of virus-targeted antibodies that protected animals against ZIKV challenges, but their use potentially will predispose vaccinated individuals to infection by the related Dengue virus (DENV). We have devised a virus like particle (VLP) carrier based on the hepatitis B core antigen (HBcAg) that displays the ZIKV E protein domain III (zDIII), and shown that it can be produced quickly and easily purified in large quantities from Nicotiana benthamiana plants...
August 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28791258/prevention-and-control-strategies-to-counter-dengue-virus-infection
#16
REVIEW
Irfan A Rather, Hilal A Parray, Jameel B Lone, Woon K Paek, Jeongheui Lim, Vivek K Bajpai, Yong-Ha Park
Dengue is currently the highest and rapidly spreading vector-borne viral disease, which can lead to mortality in its severe form. The globally endemic dengue poses as a public health and economic challenge that has been attempted to suppress though application of various prevention and control techniques. Therefore, broad spectrum techniques, that are efficient, cost-effective, and environmentally sustainable, are proposed and practiced in dengue-endemic regions. The development of vaccines and immunotherapies have introduced a new dimension for effective dengue control and prevention...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28771479/direct-cost-of-dengue-hospitalization-in-zhongshan-china-associations-with-demographics-virus-types-and-hospital-accreditation
#17
MULTICENTER STUDY
Jing Hua Zhang, Juan Yuan, Tao Wang
BACKGROUND: Zhongshan City of Guangdong Province (China) is a key provincial and national level area for dengue fever prevention and control. The aim of this study is to analyze how the direct hospitalization costs and the length of stay of dengue hospitalization cases vary according to associated factors such as the demographics, virus types and hospital accreditation. METHOD: This study is based on retrospective census data from the Chinese National Disease Surveillance Reporting System...
August 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28757293/economic-cost-and-burden-of-dengue-during-epidemics-and-non-epidemic-years-in-taiwan
#18
Dih-Ling Luh, Cheng-Chieh Liu, Yun-Ru Luo, Szu-Chieh Chen
BACKGROUND: Determining the disease and economic burden of dengue is critical for the allocation of public health resources. Several studies have used disability-adjusted life-years (DALYs) to estimate the disease burden of dengue in different regions. However, there are no published studies discussing the estimates of dengue-related economic and disease burden specifically in Taiwan. OBJECTIVES: We assessed the economic cost and disease burden of dengue infections in Taiwan for the period 1998-2014, and compared these during epidemic and non-epidemic years...
July 27, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28740942/anti-viral-effects-of-medicinal-plants-in-the-management-of-dengue-a-systematic-review
#19
REVIEW
Éric Heleno Freira Ferreira Frederico, André Luiz Bandeira Dionísio Cardoso, Eloá Moreira-Marconi, Danúbia da Cunha de Sá-Caputo, Carlos Alberto Sampaio Guimarães, Carla da Fontoura Dionello, Danielle Soares Morel, Laisa Liane Paineiras-Domingos, Patricia Lopes de Souza, Samuel Brandão-Sobrinho-Neto, Rafaelle Pacheco Carvalho-Lima, Eliane de Oliveira Guedes-Aguiar, Rebeca Graça Costa-Cavalcanti, Cristiane Ribeiro Kutter, Mario Bernardo-Filho
BACKGROUND: Dengue is considered as an important arboviral disease. Safe, low-cost, and effective drugs that possess inhibitory activity against dengue virus (DENV) are mostly needed to try to combat the dengue infection worldwide. Medicinal plants have been considered as an important alternative to manage several diseases, such as dengue. As authors have demonstrated the antiviral effect of medicinal plants against DENV, the aim of this study was to review systematically the published research concerning the use of medicinal plants in the management of dengue using the PubMed database...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
https://www.readbyqxmd.com/read/28722613/why-did-zika-not-explode-in-cuba-the-role-of-active-community-participation-to-sustain-control-of-vector-borne-diseases
#20
Marta Castro, Dennis Pérez, Maria G Guzman, Clare Barrington
As the global public health community develops strategies for sustainable Zika prevention and control, assessment of the Cuban response to Zika provides critical lessons learned. Cuba's early and successful response to Zika, grounded in the country's long-standing dengue prevention and control program, serves as a model of rapid mobilization of intersectoral efforts. Sustaining this response requires applying the evidence generated within the Cuban dengue program that active community participation improves outcomes and is sustainable and cost-effective...
August 2017: American Journal of Tropical Medicine and Hygiene
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