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https://www.readbyqxmd.com/read/28212349/household-dengue-prevention-interventions-expenditures-and-barriers-to-aedes-aegypti-control-in-machala-ecuador
#1
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
#2
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...
February 15, 2017: PharmacoEconomics
https://www.readbyqxmd.com/read/28187298/piezoelectric-immunochip-coated-with-thin-films-of-bacterial-cellulose-nanocrystals-for-dengue-detection
#3
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...
February 3, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28185869/disease-and-economic-burdens-of-dengue
#4
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...
February 6, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28159753/requirements-for-driving-anti-pathogen-effector-genes-into-populations-of-disease-vectors-by-homing
#5
Andrea Beaghton, Andrew Hammond, Tony Nolan, Andrea Crisanti, H Charles J Godfray, Austin Burt
There is a need for new interventions against the on-going burden of vector-borne diseases such as malaria and dengue. One suggestion has been to develop genes encoding effector molecules that block parasite development within the vector, and then use the nuclease-based homing reaction as a form of gene drive to spread those genes through target populations. If the effector gene reduces the fitness of the mosquito and does not contribute to the drive, then loss-of-function mutations in the effector will eventually replace functional copies, but protection may nonetheless persist sufficiently long to provide a public health benefit...
February 3, 2017: Genetics
https://www.readbyqxmd.com/read/28152487/a-heparin-functionalized-carbon-nanotube-based-affinity-biosensor-for-dengue-virus
#6
Daniel Wasik, Ashok Mulchandani, Marylynn V Yates
Dengue virus is an arthropod-borne virus transmitted primarily by Aedes mosquitos and is major cause of disease in tropical and subtropical regions. Colloquially known as Dengue Fever, infection can cause hemorrhagic disorders and death in humans and non-human primates. We report a novel electronic biosensor based on a single-walled carbon nanotube network chemiresistive transducer that is functionalized with heparin for low-cost, label-free, ultra-sensitive, and rapid detection of whole dengue virus (DENV)...
January 10, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28114342/spatial-analysis-of-dengue-seroprevalence-and-modeling-of-transmission-risk-factors-in-a-dengue-hyperendemic-city-of-venezuela
#7
Maria F Vincenti-Gonzalez, María-Eugenia Grillet, Zoraida I Velasco-Salas, Erley F Lizarazo, Manuel A Amarista, Gloria M Sierra, Guillermo Comach, Adriana Tami
BACKGROUND: Dengue virus (DENV) transmission is spatially heterogeneous. Hence, to stratify dengue prevalence in space may be an efficacious strategy to target surveillance and control efforts in a cost-effective manner particularly in Venezuela where dengue is hyperendemic and public health resources are scarce. Here, we determine hot spots of dengue seroprevalence and the risk factors associated with these clusters using local spatial statistics and a regression modeling approach. METHODOLOGY/PRINCIPAL FINDINGS: From August 2010 to January 2011, a community-based cross-sectional study of 2012 individuals in 840 households was performed in high incidence neighborhoods of a dengue hyperendemic city in Venezuela...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28103255/mitigating-diseases-transmitted-by-aedes-mosquitoes-a-cluster-randomised-trial-of-permethrin-impregnated-school-uniforms
#8
Pattamaporn Kittayapong, Phanthip Olanratmanee, Pongsri Maskhao, Peter Byass, James Logan, Yesim Tozan, Valérie Louis, Duane J Gubler, Annelies Wilder-Smith
BACKGROUND: Viral diseases transmitted via Aedes mosquitoes are on the rise, such as Zika, dengue, and chikungunya. Novel tools to mitigate Aedes mosquitoes-transmitted diseases are urgently needed. We tested whether commercially insecticide-impregnated school uniforms can reduce dengue incidence in school children. METHODS: We designed a cluster-randomised controlled trial in Thailand. The primary endpoint was laboratory-confirmed dengue infections. Secondary endpoints were school absenteeism; and impregnated uniforms' 1-hour knock-down and 24 hour mosquito mortality as measured by standardised WHOPES bioassay cone tests at baseline and after repeated washing...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28062794/larvicidal-and-growth-inhibitory-activity-of-entomopathogenic-bacteria-culture-fluids-against-aedes-aegypti-diptera-culicidae
#9
João Luiz Rosa da Silva, Fernanda Undurraga Schwalm, Carlos Eugênio Silva, Marisa da Costa, Ralf Heermann, Onilda Santos da Silva
Dengue, Chikungunya, and Zika are important vector-borne diseases, and Aedes aegypti L. is their main transmitter. As the disease management is mainly based on mosquito control strategies, the search for alternative and cost-effective approaches is ongoing. The Gram-negative bacteria Xenorhabdus nematophila and Photorhabdus luminescens are symbiotically associated with entomopathogenic nematodes and are highly pathogenic for insect larvae. After we have recently confirmed the toxicity of these bacteria in Ae...
January 6, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28062078/-coexistence-of-acute-appendicitis-and-dengue-fever-a-case-report
#10
Juan Fidel Osuna-Ramos, Carlos Silva-Gracia, Gerardo Joel Maya-Vacio, Alejandra Romero-Utrilla, Efrén Rafael Ríos-Burgueño, Jesús Salvador Velarde-Félix
BACKGROUND: Dengue is the most important human viral disease transmitted by mosquitoes. It can be asymptomatic or it can present in any of its 3clinical forms: Dengue fever, dengue haemorrhagic fever and dengue shock syndrome. However, some atypical manifestations have been reported in surgical emergencies caused by acute appendicitis in patients with dengue fever. CLINICAL CASE: We report the case of an 18-year-old Mexican male who presented to the emergency department of the General Hospital of Culiacan, Sinaloa, with symptoms of dengue fever, accompanied by crampy abdominal pain with positive Rovsing and Dunphy signs...
January 3, 2017: Cirugia y Cirujanos
https://www.readbyqxmd.com/read/28031723/economic-report-on-the-cost-of-dengue-fever-in-vietnam-case-of-a-provincial-hospital
#11
Luyen Dinh Pham, Nhat Huy Tran Phung, Nguyen Tu Dang Le, Trung Quang Vo
BACKGROUND: Dengue is a mosquito-borne viral illness with the world's fastest rate of infection. In 2014, Vietnam had recorded 43,000 cases in 53 provinces, with 28 deaths. MATERIALS AND METHODS: A 6-month cross-sectional study was conducted from September 2015 to March 2016 at Cu Chi General Hospital. Cost of illness in this study was estimated under the incidence-based approach from the societal perspective. RESULTS: The average cost per case was US$139...
2017: ClinicoEconomics and Outcomes Research: CEOR
https://www.readbyqxmd.com/read/28030537/molecular-virologic-and-clinical-characteristics-of-a-chikungunya-fever-outbreak-in-la-romana-dominican-republic-2014
#12
Rose M Langsjoen, Rebecca J Rubinstein, Tiffany F Kautz, Albert J Auguste, Jesse H Erasmus, Liddy Kiaty-Figueroa, Renessa Gerhardt, David Lin, Kumar L Hari, Ravi Jain, Nicolas Ruiz, Antonio E Muruato, Jael Silfa, Franklin Bido, Matthew Dacso, Scott C Weaver
Since emerging in Saint Martin in 2013, chikungunya virus (CHIKV), an alphavirus transmitted by the Aedes aegypti mosquito, has infected approximately two million individuals in the Americas, with over 500,000 reported cases in the Dominican Republic (DR). CHIKV-infected patients typically present with a febrile syndrome including polyarthritis/polyarthralgia, and a macropapular rash, similar to those infected with dengue and Zika viruses, and malaria. Nevertheless, many Dominican cases are unconfirmed due to the unavailability and high cost of laboratory testing and the absence of specific treatment for CHIKV infection...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28011234/epidemic-arboviral-diseases-priorities-for-research-and-public-health
#13
REVIEW
Annelies Wilder-Smith, Duane J Gubler, Scott C Weaver, Thomas P Monath, David L Heymann, Thomas W Scott
For decades, arboviral diseases were considered to be only minor contributors to global mortality and disability. As a result, low priority was given to arbovirus research investment and related public health infrastructure. The past five decades, however, have seen an unprecedented emergence of epidemic arboviral diseases (notably dengue, chikungunya, yellow fever, and Zika virus disease) resulting from the triad of the modern world: urbanisation, globalisation, and international mobility. The public health emergency of Zika virus, and the threat of global spread of yellow fever, combined with the resurgence of dengue and chikungunya, constitute a wake-up call for governments, academia, funders, and WHO to strengthen programmes and enhance research in aedes-transmitted diseases...
December 20, 2016: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/27993003/nanoarchitecture-based-sers-for-biomolecular-fingerprinting-and-label-free-disease-markers-diagnosis
#14
Sudarson Sekhar Sinha, Stacy Jones, Avijit Pramanik, Paresh Chandra Ray
Surface-enhanced Raman spectroscopy (SERS) fingerprinting is highly promising for identifying disease markers from complex mixtures of clinical sample, which has the capability to take medical diagnoses to the next level. Although vibrational frequency in Raman spectra is unique for each biomolecule, which can be used as fingerprint identification, it has not been considered to be used routinely for biosensing due to the fact that the Raman signal is very weak. Contemporary SERS has been demonstrated to be an excellent analytical tool for practical label-free sensing applications due its ability to enhance Raman signals by factors of up to 10(8)-10(14) orders of magnitude...
December 20, 2016: Accounts of Chemical Research
https://www.readbyqxmd.com/read/27982076/establishment-of-the-cytoplasmic-incompatibility-inducing-wolbachia-strain-wmel-in-an-important-agricultural-pest-insect
#15
Xiao-Fei Zhou, Zheng-Xi Li
The wMel Wolbachia strain was known for cytoplasmic incompatibility (CI)-induction and blocking the transmission of dengue. However, it is unknown whether it can establish and induce CI in a non-dipteran host insect. Here we artificially transferred wMel from Drosophila melanogaster into the whitefly Bemisia tabaci. Fluorescence in situ hybridisation demonstrated that wMel had successfully transfected the new host. Reciprocal crossing was conducted with wMel-transfected and wild-type isofemale lines, indicating that wMel could induce a strong CI without imposing significant cost on host fecundity...
December 16, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27970796/cost-of-dengue-illness-and-cost-effectiveness-of-the-cdy-tdv-dengue-vaccine-in-ecuador
#16
R Lucio-Romero, A R Henriquez-Trujillo, K Bermudez-Gallegos, B Tello-Ponce, A G Caicedo Navas, C Vandeputte
No abstract text is available yet for this article.
November 2016: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
https://www.readbyqxmd.com/read/27970789/cost-effective-analysis-of-the-dengue-vaccine-in-costa-rica
#17
Y Xirinachs
No abstract text is available yet for this article.
November 2016: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
https://www.readbyqxmd.com/read/27970785/cost-of-dengue-and-cost-effectiveness-of-the-dengue-vaccine-in-panama
#18
L N Garcia, L Cerezo, A Blas, S Alvarez, N Quiroz, A G Caicedo Navas, J G Lopez, C Vandeputte
No abstract text is available yet for this article.
November 2016: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
https://www.readbyqxmd.com/read/27955870/evaluation-of-a-pan-serotype-point-of-care-rapid-diagnostic-assay-for-accurate-detection-of-acute-dengue-infection
#19
Rosario Vivek, Syed Fazil Ahamed, Shalini Kotabagi, Anmol Chandele, Ira Khanna, Navin Khanna, Kaustuv Nayak, Mary Dias, Murali-Krishna Kaja, Anita Shet
The catastrophic rise in dengue infections in India and globally has created a need for an accurate, validated low-cost rapid diagnostic test (RDT) for dengue. We prospectively evaluated the diagnostic performance of NS1/IgM RDT (dengue day 1) using 211 samples from a pediatric dengue cohort representing all 4 serotypes in southern India. The dengue-positive panel consisted of 179 dengue real-time polymerase chain reaction (RT-PCR) positive samples from symptomatic children. The dengue-negative panel consisted of 32 samples from dengue-negative febrile children and asymptomatic individuals that were negative for dengue RT-PCR/NS1 enzyme-linked immunosorbent assay/IgM/IgG...
March 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/27934884/rapid-affordable-and-portable-medium-throughput-molecular-device-for-zika-virus
#20
Kamfai Chan, Scott C Weaver, Pui-Yan Wong, Sherly Lie, Eryu Wang, Mathilde Guerbois, Siva Praneeth Vayugundla, Season Wong
Zika virus (ZIKV) has gained global attention as an etiologic agent of fetal microcephaly and Guillain-Barré syndrome. Existing immuno-based rapid tests often fail to distinguish between Zika and related flaviviruses that are common in affected regions of Central and South Americas and the Caribbean. The US CDC and qualified state health department laboratories can perform the reverse transcription polymerase chain reaction (RT-PCR) ZIKV test using highly sophisticated instruments with long turnaround times...
December 9, 2016: Scientific Reports
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