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dengue prevention

Ajeet Kumar Gadhwal, B S Ankit, Chitresh Chahar, Pankaj Tantia, P Sirohi, R P Agrawal
OBJECTIVE: Thrombocytopenia in dengue fever is a common and serious complication. However, no specific treatment is available for dengue fever induced thrombocytopenia. In few countries (Pakistan, Malaysia, Sri Lanka and other Asian countries) the leaf extract of Carica papaya has been effectively used for thrombocytopenia. So, the study is planned to access effect of Carica papaya leaf extract on platelet count in dengue fever patients. METHODS: All participants were randomised into two groups, study group and control group; the study group was given papaya leaf extract capsule of 500 mg once daily and routine supportive treatment for consecutive five days...
June 2016: Journal of the Association of Physicians of India
Prabhu Nagnathappa Kasture, K H Nagabhushan, Arun Kumar
INTRODUCTION: Dengue is a rapidly expanding global health problem. Approximately 2.5 billion people live in dengue-risk regions with about 100 million new cases each year worldwide. The cumulative dengue diseases burden has attained an unprecedented proportion in recent times with sharp increase in the size of human population at risk. The management of dengue virus infection is essentially supportive and symptomatic and no specific treatment is available for increasing the fallen platelets, which have a significant role in causing the mortality of dengue patient...
June 2016: Journal of the Association of Physicians of India
Xianghong Zhang, Sanyi Tang, Robert A Cheke, Huaiping Zhu
Dengue fever has rapidly become the world's most common vector-borne viral disease. Use of endosymbiotic Wolbachia is an innovative technology to prevent vector mosquitoes from reproducing and so break the cycle of dengue transmission. However, strategies such as population eradication and replacement will only succeed if appropriate augmentations with Wolbachia-infected mosquitoes that take account of a variety of factors are carried out. Here, we describe the spread of Wolbachia in mosquito populations using an impulsive differential system with four state variables, incorporating the effects of cytoplasmic incompatibility and the augmentation of Wolbachia-infected mosquitoes with different sex ratios...
October 12, 2016: Bulletin of Mathematical Biology
Ko Chang, Chaur-Dong Chen, Chien-Ming Shih, Tzu-Chi Lee, Ming-Tsang Wu, Deng-Chyang Wu, Yen-Hsu Chen, Chih-Hsing Hung, Meng-Chieh Wu, Chun-Chi Huang, Chien-Hung Lee, Chi-Kung Ho
In Kaohsiung, a metropolitan city in Taiwan at high risk of dengue epidemic, weather factors combined with an accidental petrochemical gas explosion (PGE) may affect mosquito‒human dynamics in 2014. Generalized estimating equations with lagged-time Poisson regression analyses were used to evaluate the effect of meteorological/mosquito parameters and PGE on dengue incidences (2000-2014) in Kaohsiung. Increased minimum temperatures rendered a 2- and 3-month lagging interactive effect on higher dengue risks, and higher rainfall exhibited a 1- and 2-month lagging interplay effect on lower risks (interaction, P ≤ 0...
October 13, 2016: Scientific Reports
David S Younger
Zika virus is an arbovirus belonging to the Flaviviridae family known to cause mild clinical symptoms similar to those of dengue and chikungunya. Zika is transmitted by different species of Aedes mosquitoes. Nonhuman primates and possibly rodents play a role as reservoirs. Direct interhuman transmission has also been reported. Human cases have been reported in Africa and Asia, Easter Island, the insular Pacific region, and Brazil. Its clinical profile is that of a dengue-like febrile illness, but recently associated Guillain-Barre syndrome and microcephaly have appeared...
November 2016: Neurologic Clinics
Thaker A A Alyousefi, Rashad Abdul-Ghani, Mohammed A K Mahdy, Samira M A Al-Eryani, Abdulsalam M Al-Mekhlafi, Yahia A Raja, Shamusul Azhar Shah, John C Beier
BACKGROUND: Yemen has witnessed several dengue fever outbreaks coincident with the social unrest and war in the country. The aim of the present study was to describe the knowledge, attitudes and practices (KAPs) of at-risk urban populations residing in Taiz, southwest of Yemen. In addition, factors possibly associated with poor preventive practices were investigated. METHODS: A household-based, cross-sectional survey was conducted in three urban districts encompassing 383 households...
October 7, 2016: BMC Infectious Diseases
Melinda K Butterworth, Cory W Morin, Andrew C Comrie
BACKGROUND: Dengue fever, caused by a mosquito-transmitted virus, is an increasing health concern in the Americas. Meteorological variables such as temperature and precipitation can impact disease distribution and abundance through biophysical impacts on the vector and virus. Such tightly coupled links may facilitate further spread of dengue fever under a changing climate. In the southeastern United States, the dengue vector is widely established and exists on the current fringe of dengue transmission...
October 7, 2016: Environmental Health Perspectives
Champica K Bodinayake, L Gayani Tillekeratne, Ajith Nagahawatte, Vasantha Devasiri, Wasantha Kodikara Arachichi, John J Strouse, October M Sessions, Ruvini Kurukulasooriya, Anna Uehara, Shiqin Howe, Xin Mei Ong, Sharon Tan, Angelia Chow, Praveen Tummalapalli, Aruna D De Silva, Truls Østbye, Christopher W Woods, Duane J Gubler, Megan E Reller
BACKGROUND: Dengue is a frequent cause of acute febrile illness with an expanding global distribution. Since the 1960s, dengue in Sri Lanka has been documented primarily along the heavily urbanized western coast with periodic shifting of serotypes. Outbreaks from 2005-2008 were attributed to a new clade of DENV-3 and more recently to a newly introduced genotype of DENV-1. In 2007, we conducted etiologic surveillance of acute febrile illness in the Southern Province and confirmed dengue in only 6...
October 2016: PLoS Neglected Tropical Diseases
Jorge A Falcón-Lezama, Ruth A Martínez-Vega, Pablo A Kuri-Morales, José Ramos-Castañeda, Ben Adams
Dengue is a growing public health problem in tropical and subtropical cities. It is transmitted by mosquitoes, and the main strategy for epidemic prevention and control is insecticide fumigation. Effective management is, however, proving elusive. People's day-to-day movement about the city is believed to be an important factor in the epidemiological dynamics. We use a simple model to examine the fundamental roles of broad demographic and spatial structures in epidemic initiation, growth and control. We show that the key factors are local dilution, characterised by the vector-host ratio, and spatial connectivity, characterised by the extent of habitually variable movement patterns...
October 4, 2016: Bulletin of Mathematical Biology
H Lugova, S Wallis
Behavioural impact programmes are especially effective for dengue control and prevention. Universities are key settings for health promotion, so understanding factors that influence the practice of dengue prevention within a university community becomes important. This study aimed to examine the factors affecting dengue knowledge, attitude and preventive practices amongst students and staff of a public university. A cross-sectional survey study was conducted in Kuala Lumpur, Malaysia. A total of 372 students and staff of the NDUM were recruited by stratified sampling method...
October 1, 2016: Journal of Community Health
P Padmapriya, V Senthil Kumar, R Senthil Raja, A Khaleefathullah Sheriff, T S Uma, S Mohana, Kavita Arunagiri, A Anupama, N Saran, R Kiruba, K Saravana Murali, B V Suresh Babu, N Nivas Chakravarthy, K Saraswathi, K Kaveri, P Gunasekaran
Dengue is a public health problem with an increasing global incidence and geographic distribution in almost all tropical and subtropical countries, with a transition from epidemic to endemic occurrence. In this study, we report a six-year analysis (2009-2014) performed at the Department of Virology, King Institute of Preventive Medicine, Chennai, Tamil Nadu, India. Our data confirm earlier findings that dengue is highly endemic in Chennai. In the present study, 10,099 serum samples from suspected dengue cases were tested for IgM ELISA (NIV Capture) and IgG Panbio ELISA (Australia)...
September 30, 2016: Archives of Virology
Caterina Rizzo, Christian Napoli, Giulietta Venturi, Simonetta Pupella, Letizia Lombardini, Paolo Calistri, Federica Monaco, Roberto Cagarelli, Paola Angelini, Romeo Bellini, Marco Tamba, Alessandra Piatti, Francesca Russo, Giorgio Palù, Mario Chiari, Antonio Lavazza, Antonino Bella
In Italy a national Plan for the surveillance of imported and autochthonous human vector-borne diseases (chikungunya, dengue, Zika virus disease and West Nile virus (WNV) disease) that integrates human and veterinary (animals and vectors) surveillance, is issued and revised annually according with the observed epidemiological changes. Here we describe results of the WNV integrated veterinary and human surveillance systems in Italy from 2008 to 2015. A real time data exchange protocol is in place between the surveillance systems to rapidly identify occurrence of human and animal cases and to define and update the map of affected areas i...
September 15, 2016: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
(no author information available yet)
BACKGROUND & OBJECTIVES: In recent years dengue has been witnessed as an emerging public health problem. Therefore, the present study was undertaken in order to assess the knowledge, attitude, behaviour and practices (KABP) adopted by the society for its control and prevention. The changes in behaviour of community after imparting health education were also recorded to determine the effectiveness of information, education and communication (IEC) for dengue prevention and control in Jodhpur City of Rajasthan, India...
July 2016: Journal of Vector Borne Diseases
Clement N Mweya, Sharadhuli I Kimera, Grades Stanley, Gerald Misinzo, Leonard E G Mboera
BACKGROUND: Dengue is the second most important vector-borne disease of humans globally after malaria. Incidence of dengue infections has dramatically increased recently, potentially due to changing climate. Climate projections models predict increases in average annual temperature, precipitation and extreme events in the future. The objective of this study was to assess the effect of changing climate on distribution of dengue vectors in relation to epidemic risk areas in Tanzania. METHODS/FINDINGS: We used ecological niche models that incorporated presence-only infected Aedes aegypti data co-occurrence with dengue virus to estimate potential distribution of epidemic risk areas...
2016: PloS One
Mingyue Duan, Jinfeng Xiong, Dandan Lu, Guoxiu Wang, Hui Ai
Mosquito-transmitted diseases like malaria and dengue fever are global problem and an estimated 50-100 million of dengue or dengue hemorrhagic fever cases are reported worldwide every year. The mermithid nematode Romanomermis wuchangensis has been successfully used as an ecosystem-friendly biocontrol agent for mosquito prevention in laboratory studies. However, this nematode can not undergo sex differentiation in vitro culture, which has seriously affected their application of biocontrol in the field. In this study, based on transcriptome sequencing analysis of R...
2016: PloS One
Tiago França Melo de Lima, Raquel Martins Lana, Tiago Garcia de Senna Carneiro, Cláudia Torres Codeço, Gabriel Souza Machado, Lucas Saraiva Ferreira, Líliam César de Castro Medeiros, Clodoveu Augusto Davis Junior
The prevention and control of dengue are great public health challenges for many countries, particularly since 2015, as other arboviruses have been observed to interact significantly with dengue virus. Different approaches and methodologies have been proposed and discussed by the research community. An important tool widely used is modeling and simulation, which help us to understand epidemic dynamics and create scenarios to support planning and decision making processes. With this aim, we proposed and developed DengueME, a collaborative open source platform to simulate dengue disease and its vector's dynamics...
2016: International Journal of Environmental Research and Public Health
Eliana G Acosta, Ralf Bartenschlager
Dengue virus (DENV) is a human threat of increasing importance. Although a tetravalent vaccine has been recently approved, owing to limited efficacy there is still an urgent need for antiviral drugs to prevent or treat DENV infections. Traditionally, antiviral drug discovery has focused on molecules targeting viral factors. However, thus far the identification of direct-acting antiviral drugs with potent DENV pan-serotypic activity has been problematic. An alternative are host-targeting antiviral drugs that hold great promise for broad-spectrum activity...
September 17, 2016: Current Opinion in Virology
Monika Simmons, Robert Putnak, Peifang Sun, Timothy Burgess, Wayne A Marasco
Passive immunization with anti-dengue virus (DENV) immune serum globulin (ISG) or monoclonal antibodies (Mabs) may serve to supplement or replace vaccination for short-term dengue immune prophylaxis. In the present study, we sought to establish proof-of-concept by evaluating several DENV-neutralizing antibodies for their ability to protect rhesus macaques against viremia following live virus challenge, including human anti-dengue ISG, and a human Mab (Mab11/wt) and its genetically engineered variant (Mab11/mutFc) that is unable to bind to cells with Fc gamma receptors (FcγR) and potentiate antibody-dependent enhancement (ADE)...
September 19, 2016: American Journal of Tropical Medicine and Hygiene
Elvina Viennet, Scott A Ritchie, Craig R Williams, Helen M Faddy, David Harley
Dengue has a negative impact in low- and lower middle-income countries, but also affects upper middle- and high-income countries. Despite the efforts at controlling this disease, it is unclear why dengue remains an issue in affluent countries. A better understanding of dengue epidemiology and its burden, and those of chikungunya virus and Zika virus which share vectors with dengue, is required to prevent the emergence of these diseases in high-income countries in the future. The purpose of this review was to assess the relative burden of dengue in four high-income countries and to appraise the similarities and differences in dengue transmission...
September 2016: PLoS Neglected Tropical Diseases
P Rodpothong, Ch Boonarkart, K Ruangrung, N Onsirisakul, D Kanistanon, P Auewarakul
Viral surface proteins, premembrane protein (prM) and envelope (E) protein have been shown to induce a production of antibodies that are involved in both enhancement and neutralization. To explore the feasibility of modifying the relative immune responses to prM and E proteins, four DNA constructs were created and administered into groups of Balb/c mice; pPW01 contains prM and E genes of DENV1, pPW02 contains prM and E genes of DENV2, pPW03 contains DENV1 prM and DENV2 E, and pPW04 contains DENV2 prM and DENV1 E...
2016: Acta Virologica
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