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dengue cost

Letícia B Smith, Shinji Kasai, Jeffrey G Scott
Aedes aegypti and A. albopictus mosquitoes are vectors of important human disease viruses, including dengue, yellow fever, chikungunya and Zika. Pyrethroid insecticides are widely used to control adult Aedes mosquitoes, especially during disease outbreaks. Herein, we review the status of pyrethroid resistance in A. aegypti and A. albopictus, mechanisms of resistance, fitness costs associated with resistance alleles and provide suggestions for future research. The widespread use of pyrethroids has given rise to many populations with varying levels of resistance worldwide, albeit with substantial geographical variation...
October 2016: Pesticide Biochemistry and Physiology
Pablo Chaparro-Narváez, Willian León-Quevedo, Carlos Andrés Castañeda-Orjuela
INTRODUCTION: Dengue in Colombia is an important public health problem due to the huge economic and social costs it has caused, especially during the disease outbreaks.  OBJECTIVE: To describe the behavior of dengue mortality in Colombia between 1985 and 2012.  MATERIALS AND METHODS: We conducted a descriptive study. Information was obtained from mortality and population projection databases provided by the Departamento Administrativo Nacional de Estadística (DANE) for the 1985-2012 period...
2016: Biomédica: Revista del Instituto Nacional de Salud
Gloria Ruiz-Guzmán, José Ramos-Castañeda, Angélica Hernández-Quintero, Jorge Contreras-Garduño
Parasites can be transmitted either or both, vertically or horizontally, but the costs or benefits for the host due to infection have only been tested after horizontal transmission. Here as far as we know, is reported for the first time the survival, reproduction and infection of Aedes aegypti during vertical and horizontal transmission of Dengue virus 2 (DENV-2). Females infected horizontally produced more eggs with a sex ratio skewed to males compared to uninfected controls. However, there was a not significant difference on the number of emerging adults or mothers survival...
September 12, 2016: Journal of Experimental Biology
Marimuthu Govindarajan, Shine Kadaikunnan, Naiyf S Alharbi, Giovanni Benelli
Mosquito control is facing key challenges, including outbreaks of new arbovirus threats. We proposed an eco-friendly synthesis of silver nanoparticles (AgNPs) employing a low-cost extract of Hugonia mystax. AgNPs were specified by UV, XRD, FTIR and EDX spectroscopy, SEM and TEM. AgNPs were more toxic to Anopheles stephensi, Aedes aegypti, and Culex quinquefasciatus larvae (LC50: 14.45, 15.86, and 17.46 μg/mL) if compared to aquatic biocontrol organisms Gambusia affinis, Diplonychus indicus, and Anisops bouvieri (LC50: 2567...
September 9, 2016: Artificial Cells, Nanomedicine, and Biotechnology
Marimuthu Govindarajan, Shine Kadaikunnan, Naiyf S Alharbi, Giovanni Benelli
The recent outbreaks of dengue, chikungunya, and Zika virus highlighted the pivotal importance of mosquito vector control in tropical and subtropical areas worldwide. However, mosquito control is facing hot challenges, mainly due to the rapid development of pesticide resistance in Culicidae and the limited success of biocontrol programs on Aedes mosquitoes. In this framework, screening botanicals for their mosquitocidal potential may offer effective and eco-friendly tools in the fight against mosquitoes. In the present study, the essential oil (EO) obtained from the medicinal plant Origanum scabrum was analyzed by GC-MS and evaluated for its mosquitocidal and repellent activities towards Anopheles stephensi, Aedes aegypti, Culex quinquefasciatus, and Culex tritaeniorhynchus...
September 8, 2016: Environmental Science and Pollution Research International
Eunha Shim
Dengue is one of the most problematic vector-borne diseases in the Philippines, with an estimated 842,867 cases resulting in medical costs of $345 million U.S. dollars annually. In December 2015, the first dengue vaccine, known as chimeric yellow fever virus-dengue virus tetravalent dengue vaccine, was approved for use in the Philippines and is given to children 9 years of age. To estimate the cost-effectiveness of dengue vaccination in the Philippines, we developed an age-structured model of dengue transmission and vaccination...
September 6, 2016: American Journal of Tropical Medicine and Hygiene
Adriana Zubieta-Zavala, Guillermo Salinas-Escudero, Adrian Ramírez-Chávez, Luis García-Valladares, Malaquias López-Cervantes, Juan Guillermo López Yescas, Luis Durán-Arenas
INTRODUCTION: The increasing burden of dengue fever (DF) in the Americas, and the current epidemic in previously unaffected countries, generate major costs for national healthcare systems. There is a need to quantify the average cost per DF case. In Mexico, few data are available on costs, despite DF being endemic in some areas. Extrapolations from studies in other countries may prove unreliable and are complicated by the two main Mexican healthcare systems (the Secretariat of Health [SS] and the Mexican Social Security Institute [IMSS])...
August 2016: PLoS Neglected Tropical Diseases
Mario Recker, Kirsten Vannice, Joachim Hombach, Mark Jit, Cameron P Simmons
In response to the sharp rise in the global burden caused by dengue virus (DENV) over the last few decades, the WHO has set out three specific key objectives in its disease control strategy: (i) to estimate the true burden of dengue by 2015; (ii) a reduction in dengue mortality by at least 50% by 2020 (used as a baseline); and (iii) a reduction in dengue morbidity by at least 25% by 2020. Although various elements will all play crucial parts in achieving this goal, from diagnosis and case management to integrated surveillance and outbreak response, sustainable vector control, vaccine implementation and finally operational and implementation research, it seems clear that new tools (e...
August 31, 2016: Vaccine
Aneesh Basheer, Nayyar Iqbal, Sudhagar Mookkappan, Patricia Anitha, Shashikala Nair, Reba Kanungo, Ravichandran Kandasamy
BACKGROUND: Concurrent infection with multiple pathogens is common in tropics, posing diagnostic and treatment challenges. Although co-infections of dengue, malaria, leptospirosis and typhoid in various combinations have been described, data on dengue and scrub typhus co-infection is distinctly limited. METHODOLOGY: This study was a retrospective analysis of dengue and scrub typhus co-infection diagnosed between January 2010 and July 2014 at a tertiary care center...
2016: Mediterranean Journal of Hematology and Infectious Diseases
Daniel García-Ruíz, Marco A Martínez-Guzmán, Albertina Cárdenas-Vargas, Erika Marino-Marmolejo, Abel Gutiérrez-Ortega, Esteban González-Díaz, Rayo Morfin-Otero, Eduardo Rodríguez-Noriega, Hector Pérez-Gómez, Darwin Elizondo-Quiroga
Dengue virus (DENV) infection causes sudden fever along with several nonspecific signs and symptoms and in severe cases, death. DENV is transmitted to people by Aedes aegypti and Ae. albopictus mosquitoes, whose populations increase during rainy season. West Nile Virus (WNV), Rickettsia spp. and Leptospira spp. are fever-causing pathogens that share many of the initial symptoms of DENV infection and also thrive in the rainy season. Outbreaks in some regions may be due to any of these pathogens that can co-circulate...
2016: SpringerPlus
Leigh R Bowman, Gustavo S Tejeda, Giovanini E Coelho, Lokman H Sulaiman, Balvinder S Gill, Philip J McCall, Piero L Olliaro, Silvia R Ranzinger, Luong C Quang, Ronald S Ramm, Axel Kroeger, Max G Petzold
BACKGROUND: Worldwide, dengue is an unrelenting economic and health burden. Dengue outbreaks have become increasingly common, which place great strain on health infrastructure and services. Early warning models could allow health systems and vector control programmes to respond more cost-effectively and efficiently. METHODOLOGY/PRINCIPAL FINDINGS: The Shewhart method and Endemic Channel were used to identify alarm variables that may predict dengue outbreaks. Five country datasets were compiled by epidemiological week over the years 2007-2013...
2016: PloS One
Cristopher D Cruz, Armando Torre, Gilda Troncos, Louis Lambrechts, Mariana Leguia
We report optimized workflows for full-genome sequencing of dengue viruses (DENVs) 1-4. Based on alignments of publicly available complete genomes we modified and expanded existing primers sets to amplify DENV genotypes that were previously difficult or impossible to sequence. We also report improvements to streamline laboratory handling, including a dual amplification strategy for easy and difficult to sequence "high-copy" and "low-copy" templates, respectively, and normalization of PCR cycling conditions across serotypes...
September 2016: Journal of Virological Methods
Eunho Suh, Yuqing Fu, David R Mercer, Stephen L Dobson
Maternally inherited Wolbachia bacteria are being introduced into vector mosquito populations, with the goal of reducing the transmission of diseases such as dengue fever. The infection dynamics of Wolbachia depends upon the ability of Wolbachia to manipulate host reproduction as well as any fitness costs imposed upon the host. Some vector mosquito species are opportunistic blood feeders, utilizing both human and nonhuman vertebrate hosts, and the effects of bloodmeal source on Wolbachia phenotype is not well understood...
June 16, 2016: Journal of Medical Entomology
Giorgio Guzzetta, Fabrizio Montarsi, Frédéric Alexandre Baldacchino, Markus Metz, Gioia Capelli, Annapaola Rizzoli, Andrea Pugliese, Roberto Rosà, Piero Poletti, Stefano Merler
The rapid invasion and spread of Aedes albopictus (Skuse, 1894) within new continents and climatic ranges has created favorable conditions for the emergence of tropical arboviral diseases in the invaded areas. We used mosquito abundance data from 2014 collected across ten sites in northern Italy to calibrate a population model for Aedes albopictus and estimate the potential of imported human cases of chikungunya or dengue to generate the condition for their autochthonous transmission in the absence of control interventions...
June 2016: PLoS Neglected Tropical Diseases
Xinna Li, Kai Nie, Ji Wang, Dan Zhang, Li Guan, Jun Liu, Yuehua Ke, Hangyu Zhou, Xuejun Ma
Given the Ebola outbreak in West Africa and the risks of spread to other regions, a rapid, sensitive and simple method for the detection of the Ebola virus (EBOV) is of great significance for the prevention and control of Ebola. We developed a simple colorimetric isothermal multiple self-matching initiated amplification (IMSA) for rapid detection of the Zaire subtype of the Ebola virus (EBOV-Z). This method employed six primers that recognized seven sites of the EBOV-Z nucleoprotein gene for amplification of nucleic acids under isothermal conditions at 63 degrees C for 1 h...
January 2016: Bing du Xue Bao, Chinese Journal of Virology
Ernest Tambo, Jun-Hu Chen, Xiao-Nong Zhou, Emad I M Khater
Dengue is still a substantial vector-borne viral disease threat and burden of public health importance worldwide. This situation is complicated by dengue virus unprecedented resurgence and persistence of varied serotypes in endemic-prone areas, and man-made and natural activities consequences that promote vector emergence, transmission dynamics and spread across the Asia-Pacific region. There is an urgent need to strengthen operational and contextual surveillance-response research in improving early detection of active reservoir detection, novel drug in case management and quality evidence-based response including the deployment of dengue mass vaccination...
2016: Infectious Diseases of Poverty
Varun Kalra, Sohaib Ahmad, Vikas Shrivastava, Garima Mittal
BACKGROUND: A single diagnostic test for acute undifferentiated febrile illnesses (AUFI) is elusive. This pilot study was undertaken on the premise that leucocytes, being the main cells of defence, undergo quantitative, structural and functional changes in AUFI. We evaluated the potential of volume, conductivity and scatter (VCS) parameters of leucocytes, generated with the haemogram report by the Coulter auto-analyzer, in differentiating the common etiologies of AUFI. METHODS: The haematological and VCS data obtained from 800 controls and 200 cases of AUFI (50 cases each of acute malaria, dengue, scrub typhus and enteric fever) were retrieved for analysis...
May 2016: Transactions of the Royal Society of Tropical Medicine and Hygiene
Ashwini Manoor Anand, Sujatha Sistla, Rahul Dhodapkar, Abdoul Hamide, Niranjan Biswal, Badrinath Srinivasan
INTRODUCTION: Dengue is a mosquito-borne disease affecting mainly tropical and subtropical regions of the world. The early diagnosis of dengue is required for identifying an epidemic and also for implementing effective vector control measures. AIM: To evaluate NS1 antigen assay as an alternative to RT-PCR for the early diagnosis of Dengue. MATERIALS AND METHODS: A comparative study was conducted to evaluate NS1 antigen assay in clinically suspected dengue cases admitted to JIPMER hospital from January to November 2011...
April 2016: Journal of Clinical and Diagnostic Research: JCDR
Jesse J Waggoner, Lionel Gresh, Alisha Mohamed-Hadley, Gabriela Ballesteros, Maria Jose Vargas Davila, Yolanda Tellez, Malaya K Sahoo, Angel Balmaseda, Eva Harris, Benjamin A Pinsky
Clinical manifestations of Zika virus, chikungunya virus, and dengue virus infections can be similar. To improve virus detection, streamline molecular workflow, and decrease test costs, we developed and evaluated a multiplex real-time reverse transcription PCR for these viruses.
July 2016: Emerging Infectious Diseases
Olga D Lorenzi, Chelsea Major, Veronica Acevedo, Janice Perez-Padilla, Aidsa Rivera, Brad J Biggerstaff, Jorge Munoz-Jordan, Stephen Waterman, Roberto Barrera, Tyler M Sharp
Aedes species mosquitoes transmit chikungunya virus, as well as dengue and Zika viruses, and bite most often during the day.* Infectious mosquito bites frequently occur in and around homes (1,2). Caribbean countries first reported local transmission of chikungunya virus in December 2013, and soon after, chikungunya virus spread throughout the Americas (3). Puerto Rico reported its first laboratory-positive chikungunya case in May 2014 (4), and subsequently identified approximately 29,000 suspected cases throughout the island by the end of 2015...
2016: MMWR. Morbidity and Mortality Weekly Report
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