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https://www.readbyqxmd.com/read/28638764/small-molecule-dengue-virus-co-imprinting-and-its-application-as-an-electrochemical-sensor
#1
Wannisa Sukjee, Chompoonuch Tancharoen, Pa-Thai Yenchitsomanus, M Paul Gleeson, Chak Sangma
Polymers can be synthesized to recognize small molecules. This is achieved by introducing the target molecule during monomer self-assembly, where they can be incorporated during cross-linking polymerization. Following additional pre-processing, the material obtained can then be applied as a sensing layer for these molecules in many applications. The sensitivity of the polymers depends on the "active sites" imprinted on the surface. Increasing the number of active sites on the polymers surface can be achieved by using nanoparticles as a platform to support and concentrate the molecules for imprinting...
June 2017: ChemistryOpen
https://www.readbyqxmd.com/read/28636445/developing-a-casper-survey-to-assess-the-prevalence-of-risk-factors-for-neglected-tropical-diseases-in-texas
#2
Seth Smitherman, Tracy Hammond, Daniel Goldberg, Jennifer Horney
While more than a billion people live at risk of neglected tropical diseases in areas of Asia, sub-Saharan Africa, and Latin America, the degree to which such diseases burden countries like the United States is currently unclear. Even though many neglected tropical diseases such as dengue, leishmaniasis, and Chagas disease are not endemic to the United States, the possibility of their emergence is noteworthy, especially in states like Texas, which has high levels of poverty, a large immigrant population, and a climate amenable to the vectors for these diseases and is geographically proximate to endemic areas...
May 2017: Health Security
https://www.readbyqxmd.com/read/28583207/knockdown-resistance-kdr-of-the-voltage-gated-sodium-channel-gene-of-aedes-aegypti-population-in-denpasar-bali-indonesia
#3
Penny Humaidah Hamid, Joko Prastowo, Anis Widyasari, Anja Taubert, Carlos Hermosilla
BACKGROUND: Aedes aegypti is the main vector of several arthropod-borne viral infections in the tropics profoundly affecting humans, such as dengue fever (DF), West Nile (WN), chikungunya and more recently Zika. Eradication of Aedes still largely depends on insecticides, which is the most cost-effective strategy, and often inefficient due to resistance development in exposed Aedes populations. We here conducted a study of Ae. aegypti resistance towards several insecticides regularly used in the city of Denpasar, Bali, Indonesia...
June 5, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28560654/newer-vaccines-against-mosquito-borne-diseases
#4
Anju Aggarwal, Neha Garg
Mosquitos are responsible for a number of protozoal and viral diseases. Malaria, dengue, Japanese encephalitis (JE) and chikungunya epidemics occur commonly all over the world, leading to marked mortality and morbidity in children. Zika, Yellow fever and West Nile fever are others requiring prevention. Environmental control and mosquito bite prevention are useful in decreasing the burden of disease but vaccination has been found to be most cost-effective and is the need of the hour. RTS,S/AS01 vaccine is the first malaria vaccine being licensed for use against P...
May 31, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/28553618/effective-protection-induced-by-a-monovalent-dna-vaccine-against-dengue-virus-dv-serotype-1-and-a-bivalent-dna-vaccine-against-dv1-and-dv2-in-mice
#5
Xiaoyan Zheng, Hui Chen, Ran Wang, Dongying Fan, Kaihao Feng, Na Gao, Jing An
Dengue virus (DV) is the causal pathogen of dengue fever, which is one of the most rapidly spread mosquito-borne disease worldwide and has become a severe public health problem. Currently, there is no specific treatment for dengue; thus, a vaccine would be an effective countermeasure to reduce the morbidity and mortality. Although, the chimeric Yellow fever dengue tetravalent vaccine has been approved in some countries, it is still necessary to develop safer, more effective, and less costly vaccines. In this study, a DNA vaccine candidate pVAX1-D1ME expressing the prME protein of DV1 was inoculated in BALB/c mice via intramuscular injection or electroporation, and the immunogenicity and protection were evaluated...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28500811/cost-effectiveness-of-dengue-vaccination-programs-in-brazil
#6
Eunha Shim
AbstractThe first approved dengue vaccine, CYD-TDV, a chimeric, live-attenuated, tetravalent dengue virus vaccine, was recently licensed in 13 countries, including Brazil. In light of recent vaccine approval, we modeled the cost-effectiveness of potential vaccination policies mathematically based on data from recent vaccine efficacy trials that indicated that vaccine efficacy was lower in seronegative individuals than in seropositive individuals. In our analysis, we investigated several vaccination programs, including routine vaccination, with various vaccine coverage levels and those with and without large catch-up campaigns...
May 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28473308/sa%C3%A3%C2%BAde-na-copa-the-world-s-first-application-of-participatory-surveillance-for-a-mass-gathering-at-fifa-world-cup-2014-brazil
#7
Onicio Leal Neto, George Santiago Dimech, Marlo Libel, Wayner Vieira de Souza, Eduarda Cesse, Mark Smolinski, Wanderson Oliveira, Jones Albuquerque
BACKGROUND: The 2005 International Health Regulations (IHRs) established parameters for event assessments and notifications that may constitute public health emergencies of international concern. These requirements and parameters opened up space for the use of nonofficial mechanisms (such as websites, blogs, and social networks) and technological improvements of communication that can streamline the detection, monitoring, and response to health problems, and thus reduce damage caused by these problems...
May 4, 2017: JMIR Public Health and Surveillance
https://www.readbyqxmd.com/read/28468604/simultaneous-detection-of-chikungunya-virus-dengue-virus-and-human-pathogenic-leptospira-genomes-using-a-multiplex-taqman%C3%A2-assay
#8
Claude Giry, Bénédicte Roquebert, Ghislaine Li-Pat-Yuen, Philippe Gasque, Marie-Christine Jaffar-Bandjee
BACKGROUND: In 2005-2006 a major epidemics of Chikungunya disease occurred in South-West Indian Ocean islands. In Reunion Island, the magnitude of Chikungunya infection related symptoms was high and with over 38% of serological prevalence in the population. This epidemics illustrated the potential threat of emerging arboviral diseases for inhabitants of Reunion Island and elsewhere since vectors are worldwide distributed. A sentinel surveillance network was set-up to detect emerging pathogens associated with fever over 38 °C and in the absence of known etiologic causes...
May 3, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28442105/towards-development-of-a-universal-dengue-vaccine-how-close-are-we
#9
REVIEW
Ee Leen Pang, Hwei-San Loh
Dengue has been ranked as one of the top emerging diseases in Asia and Latin America. Current epidemiological data may not even reflect the true burden of disease due to under-reported figures. Vector control programmes have failed to contain the disease and worst of all, no specific treatment is available at the moment. Thereby, this pushes the demand for a dengue vaccine as a long-term protective approach. Despite there are numerous vaccine candidates ahead, they could be held back by different aspects in promoting vaccine implementation...
March 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28425959/the-cost-of-arbovirus-disease-prevention-in-europe-area-wide-integrated-control-of-tiger-mosquito-aedes-albopictus-in-emilia-romagna-northern-italy
#10
Massimo Canali, Stefano Rivas-Morales, Philippe Beutels, Claudio Venturelli
Aedes albopictus (tiger mosquito) has become the most invasive mosquito species worldwide, in addition to being a well-known vector of diseases, with a proven capacity for the transmission of chikungunya and dengue viruses in Europe as well as the Zika virus in Africa and in laboratory settings. This research quantifies the cost that needs to be provided by public-health systems for area-wide prevention of arboviruses in Europe. This cost has been calculated by evaluating the expenditure of the plan for Aedes albopictus control set up in the Emilia-Romagna region (Northern Italy) after a chikungunya outbreak occurred in 2007...
April 20, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28411063/deploying-dengue-suppressing-wolbachia-robust-models-predict-slow-but-effective-spatial-spread-in-aedes-aegypti
#11
Michael Turelli, Nicholas H Barton
A novel strategy for controlling the spread of arboviral diseases such as dengue, Zika and chikungunya is to transform mosquito populations with virus-suppressing Wolbachia. In general, Wolbachia transinfected into mosquitoes induce fitness costs through lower viability or fecundity. These maternally inherited bacteria also produce a frequency-dependent advantage for infected females by inducing cytoplasmic incompatibility (CI), which kills the embryos produced by uninfected females mated to infected males...
June 2017: Theoretical Population Biology
https://www.readbyqxmd.com/read/28380060/cost-effectiveness-of-dengue-vaccination-in-yucat%C3%A3-n-mexico-using-a-dynamic-dengue-transmission-model
#12
Eunha Shim
BACKGROUND: The incidence of dengue fever (DF) is steadily increasing in Mexico, burdening health systems with consequent morbidities and mortalities. On December 9th, 2015, Mexico became the first country for which the dengue vaccine was approved for use. In anticipation of a vaccine rollout, analysis of the cost-effectiveness of the dengue vaccination program that quantifies the dynamics of disease transmission is essential. METHODS: We developed a dynamic transmission model of dengue in Yucatán, Mexico and its proposed vaccination program to incorporate herd immunity into our analysis of cost-effectiveness analysis...
2017: PloS One
https://www.readbyqxmd.com/read/28327173/a-new-paradigm-for-aedes-spp-surveillance-using-gravid-ovipositing-sticky-trap-and-ns1-antigen-test-kit
#13
Sai Ming Lau, Tock H Chua, Wan-Yussof Sulaiman, Sylvia Joanne, Yvonne Ai-Lian Lim, Shamala Devi Sekaran, Karuthan Chinna, Balan Venugopalan, Indra Vythilingam
BACKGROUND: Dengue remains a serious public health problem in Southeast Asia and has increased 37-fold in Malaysia compared to decades ago. New strategies are urgently needed for early detection and control of dengue epidemics. METHODS: We conducted a two year study in a high human density dengue-endemic urban area in Selangor, where Gravid Ovipositing Sticky (GOS) traps were set up to capture adult Aedes spp. mosquitoes. All Aedes mosquitoes were tested using the NS1 dengue antigen test kit...
March 21, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28295400/paper-based-point-of-care-testing-for-cost-effective-diagnosis-of-acute-flavivirus-infections
#14
Frederic Bedin, Laurent Boulet, Elodie Voilin, Gerald Theillet, Agnes Rubens, Christine Rozand
Flavivirus infections are a serious healthcare concern in tropical and subtropical countries. Although well-established laboratory tests can provide early diagnosis of acute dengue or Zika infections, access to these tests is limited in developing countries, presenting an urgent need to develop simple, rapid, and robust diagnostic tools. Microfluidic Paper-based Analytical Devices (μPAD), are typically rapid, cost-effective, user-friendly, and they can be used as diagnostic tools for the diagnosis of these infections at Point of Care settings...
March 11, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28270154/pandemics-pathogenicity-and-changing-molecular-epidemiology-of-cholera-in-the-era-of-global-warming
#15
REVIEW
Fazle Rabbi Chowdhury, Zannatun Nur, Nazia Hassan, Lorenz von Seidlein, Susanna Dunachie
BACKGROUND: Vibrio cholerae, a Gram-negative, non-spore forming curved rod is found in diverse aquatic ecosystems around the planet. It is classified according to its major surface antigen into around 206 serogroups, of which O1 and O139 cause epidemic cholera. A recent spatial modelling technique estimated that around 2.86 million cholera cases occur globally every year, and of them approximately 95,000 die. About 1.3 billion people are currently at risk of infection from cholera. Meta-analysis and mathematical modelling have demonstrated that due to global warming the burden of vector-borne diseases like malaria, leishmaniasis, meningococcal meningitis, viral encephalitis, dengue and chikungunya will increase in the coming years in the tropics and beyond...
March 7, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28266580/cre-lox-recombinase-mediated-cassette-exchange-for-reversible-site-specific-genomic-targeting-of-the-disease-vector-aedes-aegypti
#16
Irina Häcker, Robert A Harrell Ii, Gerrit Eichner, Kristina L Pilitt, David A O'Brochta, Alfred M Handler, Marc F Schetelig
Site-specific genome modification (SSM) is an important tool for mosquito functional genomics and comparative gene expression studies, which contribute to a better understanding of mosquito biology and are thus a key to finding new strategies to eliminate vector-borne diseases. Moreover, it allows for the creation of advanced transgenic strains for vector control programs. SSM circumvents the drawbacks of transposon-mediated transgenesis, where random transgene integration into the host genome results in insertional mutagenesis and variable position effects...
March 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28212349/household-dengue-prevention-interventions-expenditures-and-barriers-to-aedes-aegypti-control-in-machala-ecuador
#17
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/28205150/the-potential-cost-effectiveness-of-different-dengue-vaccination-programmes-in-malaysia-a-value-based-pricing-assessment-using-dynamic-transmission-mathematical-modelling
#18
Asrul Akmal Shafie, Hui Yee Yeo, Laurent Coudeville, Lucas Steinberg, Balvinder Singh Gill, Rohani Jahis, Amar-Singh Hss
BACKGROUND: Dengue disease poses a great economic burden in Malaysia. METHODS: This study evaluated the cost effectiveness and impact of dengue vaccination in Malaysia from both provider and societal perspectives using a dynamic transmission mathematical model. The model incorporated sensitivity analyses, Malaysia-specific data, evidence from recent phase III studies and pooled efficacy and long-term safety data to refine the estimates from previous published studies...
May 2017: PharmacoEconomics
https://www.readbyqxmd.com/read/28187298/piezoelectric-immunochip-coated-with-thin-films-of-bacterial-cellulose-nanocrystals-for-dengue-detection
#19
Cleverton Luiz Pirich, Rilton Alves de Freitas, Roberto Manuel Torresi, Guilherme Fadel Picheth, Maria Rita Sierakowski
Low-cost piezoelectric devices, such as simple frequency monitoring quartz crystal microbalance (QCM) devices, have good clinical utility as fast diagnostic tools for the detection of several diseases. However, unspecific antigen recognition, poor molecular probe adsorption and the need for sample dilution are still common drawbacks that hinder their use in routine diagnosis. In this work, piezoelectric sensors were previously coated with thin films of bacterial cellulose nanocrystals (CN) to provide a more sensitive and adapted interface for the attachment of monoclonal immunoglobulin G (IgGNS1) and to favor specific detection of non-structural protein 1 (NS1) of dengue fever...
June 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28185869/disease-and-economic-burdens-of-dengue
#20
REVIEW
Marcia C Castro, Mary E Wilson, David E Bloom
The burden of dengue is large and growing. More than half of the global population lives in areas with risk of dengue transmission. Uncertainty in burden estimates, however, challenges policy makers' ability to set priorities, allocate resources, and plan for interventions. In this report, the first in a Series on dengue, we explore the estimations of disease and economic burdens of dengue, and the major estimation challenges, limitations, and sources of uncertainty. We also reflect on opportunities to remedy these deficiencies...
March 2017: Lancet Infectious Diseases
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